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The Boy's Playbook of Science
The Boy's Playbook of Science

Chapter III

Chapter 3 of The Boy's Playbook of Science is here in full — 9 sentences across 2 reading sections, with audio for every sentence and word.

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Context Illustration Reading 1/1 · 9 lines
English subtitles · tap any word to listen 1 / 9
CENTRIFUGAL FORCE.
That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.
The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.
The toy called the centrifugal railway is also a very pretty illustration of the same fact.
A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.
[Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.
A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.
The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.
Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]
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LEARNER DICTIONARY
Archivist
/ˈɑːrkɪvɪst/
Editorial verification pending

A keeper or guardian of historical records and memories.

The Boy's Playbook of Science

Chapter III

Chapter 3 of The Boy's Playbook of Science is here in full — 9 sentences across 2 reading sections, with audio for every sentence and word.

Reading 1/1 · 9 reading units · Lines 1–9

Line 1
CENTRIFUGAL FORCE.
/ˈsentrɪfjuːɡəl fɔːrs/
Line 2
That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.
Line 3
The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.
/ðə seɪm fækt meɪ biː ˈɪləstreɪtəd baɪ ə skwer məˈhɑːɡəni rɑːd seɪ wʌn ɪntʃ skwer ənd θriː fiːt lɔːŋ wɪð tuː flæps eɪˈtiːn ˈɪntʃəz ɪn leŋkθ ˈhæŋɪŋ baɪ ˈhɪndʒɪz ənd ˈperəlel tuː ðə saɪdz ʌv ðə ˈsentər rɑːd wɪtʃ ˌɪˈmiːdiːətli flaɪ aʊt ɑːn ðə roʊˈteɪʃən ʌv ðə lɔːŋ ˈsentər piːs/
Line 4
The toy called the centrifugal railway is also a very pretty illustration of the same fact.
/ðə tɔɪ kɔːld ðə ˈsentrɪfjuːɡəl ˈreɪlweɪ ɪz ˈɔːlsoʊ ə ˈveri ˈprɪti ˌɪləˈstreɪʃən ʌv ðə seɪm fækt/
Line 5
A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.
/ə ɡlæs ʌv ˈwɔːtər ɔːr ə kɔɪn meɪ biː pleɪst ɪn ðə ˈlɪtəl ˈkærɪdʒ ənd ˌɔːlˈðoʊ ɪt mʌst biː twaɪs ˈhæŋɪŋ ˌpɜːrpənˈdɪkjələr ɪn ə laɪn wɪð ðə ɜːrθ ðə ˈkærɪdʒ dʌz nɑːt ˈtʌmbəl əˈweɪ frʌm ɪts əˈpɔɪntɪd træk ənd ðə ˈsentrɪfjuːɡəl fɔːrs baɪndz ɪt ˈfɜːrmli tuː ðə ˌɪnˈtɪriər ʌv ðə ˈsɜːrkəl raʊnd wɪtʃ ɪt riˈvɑːlvz/
Line 6
[Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.
Line 7
A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.
/ə huːp wen ˈtrʌndəld wʊd ˈtʌmbəl ɑːn ɪts saɪd ɪf ðə fɔːrs ʌv ˌɡrævɪˈteɪʃən wɑːz nɑːt ˈoʊvərkʌm baɪ ðə ˈsentrɪfjuːɡəl fɔːrs wɪtʃ ˌɪmˈpɑːrts tuː ɪt ə ˈmoʊʃən ɪn ðə dərˈekʃən ʌv ə ˈtændʒənt ˈtæŋɡoʊ tuː tʌtʃ tuː ə ˈsɜːrkəl/
Line 8
The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.
Line 9
Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

Learner Dictionary

These definitions explain words found in the current reading and keep every example grounded in its original sentence.

Oxford-style entry order: headword, part of speech, US IPA, concise definition, contextual example, and audio.

centrifugal adjective US /ˈsentrɪfjuːɡəl/

tending to move away from a center

From this reading “CENTRIFUGAL FORCE.”

imparts verb US /ˌɪmˈpɑːrts/

third-person singular of “impart” — transmit (knowledge or skills)

From this reading “A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.”

revolves verb US /riˈvɑːlvz/

third-person singular of “revolve” — turn on or around an axis or a center

From this reading “A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.”

rotate verb US /ˈroʊteɪt/

turn on or around an axis or a center

From this reading “[Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.”

tangent noun US /ˈtændʒənt/

a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point

From this reading “[Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.”

tango noun US /ˈtæŋɡoʊ/

a ballroom dance of Latin-American origin

torsion noun US /ˈtɔːrʃən/

a tortuous and twisted shape or position

From this reading “[Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.”

trundled verb US /ˈtrʌndəld/

past form of “trundle” — move heavily

From this reading “A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.”

Word partnerships in these lines

English keeps certain words together, and knowing the pair is worth more than knowing each word alone. Every partnership below was counted across our whole published library, and earns its place by appearing far more often than two unrelated words of the same frequency would.

Shown as this reading writes them, with the form the library counts, what kind of pairing it is, and how often it occurs.

eighteen inches adjective + noun counted as “eighteen inch”

In this reading “The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.”

rapid motion adjective + noun

In this reading “The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.”

turning round noun + noun

In this reading “[Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.”

circle round noun + noun

move around in a circular motion

In this reading “A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.”

overcome by verb + particle

In this reading “A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.”

on the floor preposition + article + noun counted as “on … floor”

In this reading “[Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.”

same principle adjective + noun

In this reading “The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.”

illustrated by verb + particle counted as “illustrate by”

In this reading “That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.”

All words in this reading · 176

Every word in these five lines is listed here, and every one of them can be played on its own.

Dictionary details are shown only when verified; these are not licensed Oxford entries.

18

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

19

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

adeterminerUS /ə/

used before a singular noun to mean one of a group, when it is not a particular one

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

accompanyingadjectiveUS /əˈkʌmpəniɪŋ/

occurring with or following as a consequence

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

againadverbUS /əˈɡen/

anew

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

alsoadverbUS /ˈɔːlsoʊ/

in addition

From this reading The toy called the centrifugal railway is also a very pretty illustration of the same fact.

althoughconjunctionUS /ˌɔːlˈðoʊ/

in spite of the fact that

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

andconjunctionUS /ənd/

used to join words or parts of a sentence that go together

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

AnotherdeterminerUS /əˈnʌðər/

one more of the same kind, or a different one

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

appliesverbUS /əˈplaɪz/

third-person singular of “apply” — put into service; make work or employ for a particular purpose or for its inherent or natural purpose

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

appointedadjectiveUS /əˈpɔɪntɪd/

subject to appointment

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

asconjunctionUS /æz/

at the same time that; because; in the way that

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

astronomynounUS /əˈstrɑːnəmi/

the branch of physics that studies celestial bodies and the universe as a whole

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

atprepositionUS /æt/

in or near a particular place or position

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

attachingverbUS /əˈtætʃɪŋ/

-ing form of “attach” — cause to be attached

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

awayadverbUS /əˈweɪ/

from a particular thing or place or position (“forth” is obsolete)

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

axisnounUS /ˈæksəs/

a straight line through a body or figure that satisfies certain conditions

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

beauxiliary verbUS /biː/

used with a past participle to form the passive, or with -ing for continuous tenses

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

beingauxiliary verbUS /ˈbiːɪŋ/

the -ing form of “be”

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

bindsnounUS /baɪndz/

plural of “bind” — something that hinders as if with bonds

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

bodynounUS /ˈbɑːdi/

the entire physical structure of an organism (an animal, plant, or human being)

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

bulletnounUS /ˈbʊlət/

a projectile that is fired from a gun

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

byprepositionUS /baɪ/

showing who or what does the action

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

calledverbUS /kɔːld/

past form of “call” — assign a specified (usually proper) proper name to

From this reading The toy called the centrifugal railway is also a very pretty illustration of the same fact.

cannot

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

carriagenounUS /ˈkærɪdʒ/

a railcar where passengers ride

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

causesnounUS /ˈkɑːzəz/

plural of “cause” — events that provide the generative force that is the origin of something

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

centrenounUS /ˈsentər/

a low-lying region in central France

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

CENTRIFUGALadjectiveUS /ˈsentrɪfjuːɡəl/

tending to move away from a center

From this reading CENTRIFUGAL FORCE.

certainadjectiveUS /ˈsɜːrtən/

definite but not specified or identified

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

circlenounUS /ˈsɜːrkəl/

ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

closedadjectiveUS /kloʊzd/

not open or affording passage or access

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

coinverbUS /kɔɪn/

make up

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

considerverbUS /kənˈsɪdər/

deem to be

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

cordnounUS /kɔːrd/

a line made of twisted fibers or threads

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

cordsnounUS /kɔːrdz/

cotton trousers made of corduroy cloth

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

cupnounUS /kʌp/

a small open container usually used for drinking; usually has a handle

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

cutverbUS /kʌt/

separate with or as if with an instrument

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

describesverbUS /dɪˈskraɪbz/

third-person singular of “describe” — give a description of

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

directionnounUS /dərˈekʃən/

a line leading to a place or point

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

directlyadverbUS /dərˈektli/

without deviation

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

discoververbUS /dɪˈskʌvər/

discover or determine the existence, presence, or fact of

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

doesauxiliary verbUS /dʌz/

the form of “do” used with he, she, it, or a singular noun

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

drawingnounUS /ˈdrɔːɪŋ/

an illustration that is drawn by hand and published in a book, magazine, or newspaper

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

drivesnounUS /draɪvz/

plural of “drive” — the act of applying force to propel something

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

eachdeterminerUS /iːtʃ/

every one of two or more people or things, taken separately

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

earthnounUS /ɜːrθ/

the 3rd planet from the sun; the planet we live on

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

eighteenadjectiveUS /eɪˈtiːn/

being one more than seventeen

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

endnounUS /end/

either extremity of something that has length

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

examplesnounUS /ɪɡˈzæmpəlz/

plural of “example” — an item of information that is typical of a class or group

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

factnounUS /fækt/

a piece of information about circumstances that exist or events that have occurred

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

feetnounUS /fiːt/

plural of “foot” — the part of the leg of a human being below the ankle joint

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

filledadjectiveUS /fɪld/

(usually followed by “with” or used as a combining form) generously supplied with

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

firmlyadverbUS /ˈfɜːrmli/

with resolute determination

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

flapsnounUS /flæps/

a movable airfoil that is part of an aircraft wing; used to increase lift or drag

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

floornounUS /flɔːr/

the inside lower horizontal surface (as of a room, hallway, tent, or other structure)

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

flyverbUS /flaɪ/

travel through the air; be airborne

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

flyingadjectiveUS /ˈflaɪɪŋ/

moving swiftly

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

FORCEnounUS /fɔːrs/

a powerful effect or influence

From this reading CENTRIFUGAL FORCE.

frictionnounUS /ˈfrɪkʃən/

a state of conflict between persons

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

fromprepositionUS /frʌm/

showing where something starts, or who sent it

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

glassnounUS /ɡlæs/

a brittle transparent solid with irregular atomic structure

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

gravitationnounUS /ˌɡrævɪˈteɪʃən/

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

handnounUS /hænd/

the (prehensile) extremity of the superior limb

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

hangingnounUS /ˈhæŋɪŋ/

decoration that is hung (as a tapestry) on a wall or over a window

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

havingauxiliary verbUS /ˈhævɪŋ/

the -ing form of “have”

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

hemisphericaladjective

of or relating to or being a hemisphere

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

hingesnounUS /ˈhɪndʒɪz/

plural of “hinge” — a joint that holds two parts together so that one can swing relative to the other

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

hoopnounUS /huːp/

a light curved skeleton to spread out a skirt

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

ifconjunctionUS /ɪf/

on condition that; in the event that

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

illustratedverbUS /ˈɪləstreɪtəd/

past form of “illustrate” — clarify by giving an example of

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

illustrationnounUS /ˌɪləˈstreɪʃən/

artwork that helps make something clear or attractive

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

immediatelyadverbUS /ˌɪˈmiːdiːətli/

without delay or hesitation; with no time intervening

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

impartsverbUS /ˌɪmˈpɑːrts/

third-person singular of “impart” — transmit (knowledge or skills)

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

inprepositionUS /ɪn/

inside something, or within a place, period, or state

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

inchnounUS /ɪntʃ/

a unit of length equal to one twelfth of a foot

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

inchesnounUS /ˈɪntʃəz/

plural of “inch” — a unit of length equal to one twelfth of a foot

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

interioradjectiveUS /ˌɪnˈtɪriər/

situated within or suitable for inside a building

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

isauxiliary verbUS /ɪz/

the form of “be” used with he, she, it, or a singular noun

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

itpronounUS /ɪt/

a thing, animal, or idea already mentioned

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

itsdeterminerUS /ɪts/

belonging to the thing or animal already mentioned

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

lengthnounUS /leŋkθ/

the linear extent in space from one end to the other; the longest dimension of something that is fixed in place

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

linenounUS /laɪn/

a formation of people or things one beside another

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

littleadjectiveUS /ˈlɪtəl/

limited or below average in number or quantity or magnitude or extent

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

longadjectiveUS /lɔːŋ/

primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

madeadjectiveUS /meɪd/

produced by a manufacturing process

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

magnificentadjectiveUS /mæɡˈnɪfəsənt/

characterized by grandeur

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

mahoganynounUS /məˈhɑːɡəni/

wood of any of various mahogany trees; much used for cabinetwork and furniture

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

maymodal verbUS /meɪ/

used to say something is possible, or to give permission

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

moreadjectiveUS /mɔːr/

(comparative of “much” used with mass nouns) a quantifier meaning greater in size or amount or extent or degree

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

motionnounUS /ˈmoʊʃən/

the use of movements (especially of the hands) to communicate familiar or prearranged signals

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

muchadverbUS /mʌtʃ/

to a great degree or extent

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

mustmodal verbUS /mʌst/

used to say something is necessary, or almost certainly true

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

notadverbUS /nɑːt/

used to make a word, phrase, or sentence negative

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

noticedadjectiveUS /ˈnoʊtəst/

being perceived or observed

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

nowadverbUS /naʊ/

in the historical present; at this point in the narration of a series of past events

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

ofprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

offadverbUS /ɔːf/

from a particular thing or place or position (“forth” is obsolete)

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

onprepositionUS /ɑːn/

touching and supported by a surface

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

onepronounUS /wʌn/

used to mean any person in general, including the speaker

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

orconjunctionUS /ɔːr/

used to join alternatives or possibilities

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

otheradjectiveUS /ˈʌðər/

not the same one or ones already mentioned or implied

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

ourdeterminerUS /ˈaʊər/

belonging to the speaker and others

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

outadjectiveUS /aʊt/

not allowed to continue to bat or run

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

overcomeverbUS /ˈoʊvərkʌm/

win a victory over

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

PagenounUS /peɪdʒ/

one side of one leaf (of a book or magazine or newspaper or letter etc.) or the written or pictorial matter it contains

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

parallelnounUS /ˈperəlel/

something having the property of being analogous to something else

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

parasolnoun

a handheld collapsible source of shade

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

partsnounUS /pɑːrts/

the local environment

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

perpendicularnounUS /ˌpɜːrpənˈdɪkjələr/

a straight line at right angles to another line

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

piecenounUS /piːs/

a separate part of a whole

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

placedadjectiveUS /pleɪst/

situated in a particular spot or position

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

pointnounUS /pɔɪnt/

a geometric element that has position but no extension

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

powernounUS /ˈpaʊər/

possession of controlling influence

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

prettyadjectiveUS /ˈprɪti/

pleasing by delicacy or grace; not imposing

From this reading The toy called the centrifugal railway is also a very pretty illustration of the same fact.

principlenounUS /ˈprɪnsəpəl/

a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

railwaynounUS /ˈreɪlweɪ/

line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight

From this reading The toy called the centrifugal railway is also a very pretty illustration of the same fact.

rapidadjectiveUS /ˈræpəd/

done or occurring in a brief period of time

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

rapidlyadverbUS /ˈræpədli/

with speed

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

relationnounUS /riˈleɪʃən/

an abstraction belonging to or characteristic of two entities or parts together

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

ReturningadjectiveUS /rɪˈtɜːrnɪŋ/

tending to return to an earlier state

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

revolvesverbUS /riˈvɑːlvz/

third-person singular of “revolve” — turn on or around an axis or a center

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

revolvingverbUS /riˈvɑːlvɪŋ/

-ing form of “revolve” — turn on or around an axis or a center

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

ribnounUS /rɪb/

support resembling the rib of an animal

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

ribsnounUS /rɪbz/

plural of “rib” — support resembling the rib of an animal

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

rodnounUS /rɑːd/

a long thin implement made of metal or wood

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

rotateverbUS /ˈroʊteɪt/

turn on or around an axis or a center

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

rotationnounUS /roʊˈteɪʃən/

the act of rotating as if on an axis

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

roundnounUS /raʊnd/

a charge of ammunition for a single shot

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

sameadjectiveUS /seɪm/

Identical; not different.

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

sayverbUS /seɪ/

express in words

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

sciencenounUS /ˈsaɪəns/

a particular branch of scientific knowledge

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

setverbUS /set/

put into a certain place or abstract location

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

shownverbUS /ʃoʊn/

inflected form of “show” — give an exhibition of to an interested audience

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

sidenounUS /saɪd/

a place within a region identified relative to a center or reference location

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

sidesnounUS /saɪdz/

plural of “side” — a place within a region identified relative to a center or reference location

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

simpleadjectiveUS /ˈsɪmpəl/

having few parts; not complex or complicated or involved

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

spinning-top

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

squareverbUS /skwer/

make square

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

standverbUS /stænd/

be standing; be upright

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

stickverbUS /stɪk/

put, fix, force, or implant

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

strikingadjectiveUS /ˈstraɪkɪŋ/

sensational in appearance or thrilling in effect

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

studyingnounUS /ˈstʌdiɪŋ/

reading carefully with intent to remember

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

subjectnounUS /səbˈdʒekt/

the subject matter of a conversation or discussion

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

suspendverbUS /səˈspend/

hang freely

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

tangentnounUS /ˈtændʒənt/

a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

tangonounUS /ˈtæŋɡoʊ/

a ballroom dance of Latin-American origin

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

ThatconjunctionUS /ðæt/

used to introduce what somebody said, thought, or felt

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

thedeterminerUS /ðə/

used before a noun that is already known, already mentioned, or the only one of its kind

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

thempronounUS /ðem/

the people or things already mentioned, as the object

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

thereadverbUS /ðer/

in or at that place or location

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

thisdeterminerUS /ðɪs/

used for a person or thing that is near, or that has just been mentioned

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

threenounUS /θriː/

the cardinal number that is the sum of one and one and one

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

toparticleUS /tuː/

used before the base form of a verb to make the infinitive

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

torsionnounUS /ˈtɔːrʃən/

a tortuous and twisted shape or position

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

touchverbUS /tʌtʃ/

make physical contact with, come in contact with

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

toynounUS /tɔɪ/

an artifact designed to be played with

From this reading The toy called the centrifugal railway is also a very pretty illustration of the same fact.

tracknounUS /træk/

a line or route along which something travels or moves

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

trundledverbUS /ˈtrʌndəld/

past form of “trundle” — move heavily

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

tumbleverbUS /ˈtʌmbəl/

fall down, as if collapsing

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

turningnounUS /ˈtɜːrnɪŋ/

the act of changing or reversing the direction of the course

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

twiceadverbUS /twaɪs/

two times

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

twistedadjectiveUS /ˈtwɪstɪd/

having an intended meaning altered or misrepresented

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

twonounUS /tuː/

the cardinal number that is the sum of one and one or a numeral representing this number

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

umbrellanounUS /əmˈbrelə/

a lightweight handheld collapsible canopy

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

untilprepositionUS /ənˈtɪl/

up to a particular time

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

uponprepositionUS /əˈpɑːn/

a formal word for “on”

From this reading The same principle applies to the spinning-top--this toy cannot be made to stand upon its point until set in rapid motion.

veryadjectiveUS /ˈveri/

precisely as stated

From this reading The toy called the centrifugal railway is also a very pretty illustration of the same fact.

wasauxiliary verbUS /wɑːz/

the past form of “be” used with I, he, she, it, or a singular noun

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

waternounUS /ˈwɔːtər/

binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent

From this reading A glass of water, or a coin, may be placed in the little carriage, and although it must be twice hanging perpendicular in a line with the earth, the carriage does not tumble away from its appointed track, and the centrifugal force binds it firmly to the interior of the circle round which it revolves.

wepronounUS /wiː/

the speaker together with one or more other people

From this reading Returning again to the subject of gravitation, we may now consider it in relation to other and more magnificent examples which we discover by studying the science of astronomy. [Page 19]

whenconjunctionUS /wen/

at the time that

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

whichpronounUS /wɪtʃ/

used to introduce a clause giving more about a thing just mentioned

From this reading That power which drives a revolving body from a centre, and it may be illustrated by turning a closed parasol, or umbrella, rapidly round on its centre, the stick being the axis--the ribs fly out, and if there is much friction in the parts, the illustration is more certain by attaching a bullet to the end of each rib, as shown in our drawing.

withprepositionUS /wɪð/

in the company of; together with

From this reading The same fact may be illustrated by a square mahogany rod, say one inch square and three feet long, with two flaps eighteen inches in length, hanging by hinges, and parallel to the sides of the centre rod, which immediately fly out on the rotation of the long centre piece.

withdrawnadjectiveUS /wɪθˈdrɔːn/

withdrawn from society; seeking solitude

From this reading [Page 18] Another striking and very simple illustration is to suspend a hemispherical cup by three cords, and having twisted them, by turning round the cup, it may be filled with water, and directly the hand is withdrawn, the torsion of the cord causes the cup to rotate, and the water describes a circle on the floor, flying off at a tangent from the cup, as may be noticed in the accompanying cut.

wouldmodal verbUS /wʊd/

used for something imagined, polite, or habitual in the past

From this reading A hoop when trundled would tumble on its side if the force of gravitation was not overcome by the centrifugal force which imparts to it a motion in the direction of a tangent (_tango_, to touch) to a circle.

Chapter 3 of The Boy's Playbook of Science by John Henry Pepper holds 9 sentences, grouped into 2 reading sections of at most 5 sentences. The text is the source edition, unabridged, and the chapter records which sentences cover which part of the work so that nothing is dropped. Every word can be tapped for its pronunciation and dictionary entry.

What does chapter 3 of The Boy's Playbook of Science contain?

Chapter 3 holds 9 sentences of The Boy's Playbook of Science, unabridged, divided into 2 reading sections.

This page carries chapter 3 of The Boy's Playbook of Science by John Henry Pepper exactly as it stands in the source edition, without abridgement. It runs to 9 sentences, grouped into 2 sections of at most 5 sentences so that a reader can take the chapter in steady, finishable pieces. The chapter also stores a coverage record mapping every one of its sentences to a part of the work, which is how the edition demonstrates that no line was dropped.

How do I study chapter 3 of The Boy's Playbook of Science?

Work through the 2 sections in order, replaying any sentence and tapping unfamiliar words for their entries.

Each of the 2 sections in this chapter is short enough to read once, hear once, and then re-read with the vocabulary in view. Tapping a word plays it alone and opens its dictionary entry with IPA, part of speech and meaning, so the reader is never forced to guess a pronunciation from spelling. Working section by section keeps a long chapter from becoming an undifferentiated wall of text, which is the usual reason a reader abandons a work of this period.

Can chapter 3 be read aloud to me?

Yes — every sentence and every individual word in chapter 3 can be played aloud in United States English.

Audio covers the whole chapter: any sentence can be played, and any single word within it can be played on its own. The voice uses United States English. For a work of this period that matters, because spelling is an unreliable guide to pronunciation for vocabulary that has fallen out of daily use, and a learner who guesses wrong tends to keep the error. Hearing the word in its own sentence, and then alone, settles it.

Questions about reading The Boy's Playbook of Science

Common questions about reading The Boy's Playbook of Science by John Henry Pepper on this page, its source edition and its audio.

Is this the complete text of The Boy's Playbook of Science?

Yes. All 4206 sentences of Project Gutenberg eBook #41839 are kept, with a record of which sentences cover which part.

Which edition of The Boy's Playbook of Science is used?

Project Gutenberg eBook #41839, unabridged. The Project Gutenberg header, footer and licence are removed.

How long does The Boy's Playbook of Science take to read?

About 350 minutes of reading across 842 sections of 5 sentences each, at an unhurried pace.

How to read The Boy's Playbook of Science section by section

How to work through The Boy's Playbook of Science section by section, using the audio and the tap-to-define vocabulary.

  1. Open a chapter

    Choose one of the 31 chapters of The Boy's Playbook of Science to begin.

  2. Read one section

    Each section holds 5 sentences; read it once through.

  3. Listen and tap

    Play the section aloud, then tap any unfamiliar word for its entry.

Vocabulary met early in The Boy's Playbook of Science

Words and structures a reader meets early in The Boy's Playbook of Science, each tappable for pronunciation and meaning.

Chemical
A word that appears in the opening chapter of The Boy's Playbook of Science; the reader can tap it to hear it and see its dictionary entry.
Philosophical
A word that appears in the opening chapter of The Boy's Playbook of Science; the reader can tap it to hear it and see its dictionary entry.
Apparatus
A word that appears in the opening chapter of The Boy's Playbook of Science; the reader can tap it to hear it and see its dictionary entry.
Required
A word that appears in the opening chapter of The Boy's Playbook of Science; the reader can tap it to hear it and see its dictionary entry.