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

Chapter XXIII

Chapter 23 of The Boy's Playbook of Science is here in full — 39 sentences across 8 reading sections, with audio for every sentence and word.

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THE REFRACTION OF LIGHT.
This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.
In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.
It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.
If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.
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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 XXIII

Chapter 23 of The Boy's Playbook of Science is here in full — 39 sentences across 8 reading sections, with audio for every sentence and word.

Reading 1/7 · 5 reading units · Lines 1–5

Line 1
THE REFRACTION OF LIGHT.
Line 2
This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.
Line 3
In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.
Line 4
It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.
Line 5
If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

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.

astronomy noun US /əˈstrɑːnəmi/

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

From this reading “If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.”

dissolving noun US /dɪˈzɔːlvɪŋ/

the process of going into solution

From this reading “It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.”

gaseous adjective US /ˈɡæsiəs/

existing as or having characteristics of a gas

From this reading “This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.”

investigated verb US /ˌɪnˈvestəɡeɪtəd/

past form of “investigate” — investigate scientifically

From this reading “In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.”

magnifying verb US /ˈmæɡnəfaɪɪŋ/

-ing form of “magnify” — increase in size, volume or significance

From this reading “It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.”

microscope noun US /ˈmaɪkrəskoʊp/

magnifier of the image of small objects

From this reading “It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.”

polarized verb US /ˈpoʊləraɪzd/

past form of “polarize” — cause to vibrate in a definite pattern

From this reading “This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.”

substances noun US /ˈsʌbstənsəz/

plural of “substance” — the real physical matter of which a person or thing consists

From this reading “If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.”

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.

magic lantern noun + noun

an early form of slide projector

In this reading “It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.”

depends solely verb + particle counted as “depend solely”

In this reading “It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.”

previous chapter adjective + noun

In this reading “In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.”

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

In this reading “This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.”

great discoveries adjective + noun counted as “great discovery”

In this reading “If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.”

by the aid preposition + article + noun counted as “by … aid”

In this reading “If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.”

All words in this reading · 118

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.

adeterminerUS /ə/

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

absorbedadjectiveUS /əbˈzɔːrbd/

giving or marked by complete attention to

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

aidnounUS /eɪd/

a person or thing that is a resource that helps make something easier or possible to do

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

alladjectiveUS /ɔːl/

(quantifier) used with either mass or count nouns to indicate the whole number or amount of or every one of a class

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

andconjunctionUS /ənd/

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

appearsverbUS /əˈpɪrz/

third-person singular of “appear” — give a certain impression or have a certain outward aspect

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

applicationnounUS /ˌæpləˈkeɪʃən/

the act of bringing something to bear; using it for a particular purpose

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

asconjunctionUS /æz/

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

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

astronomynounUS /əˈstrɑːnəmi/

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

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

backadverbUS /bæk/

in or to or toward a former location

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

beauxiliary verbUS /biː/

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

beenauxiliary verbUS /bɪn/

the past participle of “be”

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

belongingnounUS /bɪˈlɔːŋɪŋ/

happiness felt in a secure relationship

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

bendverbUS /bend/

form a curve

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

bendingnounUS /ˈbendɪŋ/

movement that causes the formation of a curve

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

bodynounUS /ˈbɑːdi/

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

breakverbUS /breɪk/

terminate

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

breakingnounUS /ˈbreɪkɪŋ/

the act of breaking something

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

byprepositionUS /baɪ/

showing who or what does the action

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

cnounUS /siː/

a degree on the centigrade scale of temperature

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

chapternounUS /ˈtʃæptər/

a subdivision of a written work; usually numbered and titled

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

confoundedadjectiveUS /kənˈfaʊndɪd/

perplexed by many conflicting situations or statements; filled with bewilderment

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

consideredadjectiveUS /kənˈsɪdərd/

carefully weighed

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

constantlyadverbUS /ˈkɑːnstəntli/

without variation or change, in every case

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

constructionnounUS /kənˈstrʌkʃən/

the act of constructing something

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

continueverbUS /kənˈtɪnjuː/

continue a certain state, condition, or activity

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

couldmodal verbUS /kʊd/

the past of “can”; used for possibility or polite requests

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

dependsverbUS /dɪˈpendz/

third-person singular of “depend” — be contingent upon (something that is elided)

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

difficultadjectiveUS /ˈdɪfəkəlt/

not easy; requiring great physical or mental effort to accomplish or comprehend or endure

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

discoveriesnounUS /dɪˈskʌvəriz/

plural of “discovery” — the act of discovering something

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

dissolvingnounUS /dɪˈzɔːlvɪŋ/

the process of going into solution

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

eitherdeterminerUS /ˈiːðər/

one or the other of two

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

endowedadjectiveUS /enˈdaʊd/

provided or supplied or equipped with (especially as by inheritance or nature)

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

fallsnounUS /fɔːlz/

the petals or sepals of a flower that bend downward (especially the outer perianth of an iris)

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

flecto

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

frango

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

fullyadverbUS /ˈfʊli/

to the greatest degree or extent; completely or entirely; (“full” in this sense is used as a combining form)

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

gainedverbUS /ɡeɪnd/

past form of “gain” — obtain

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

gaseousadjectiveUS /ˈɡæsiəs/

existing as or having characteristics of a gas

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

glassnounUS /ɡlæs/

a brittle transparent solid with irregular atomic structure

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

glassesnounUS /ˈɡlæsəz/

(plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

greatadjectiveUS /ɡreɪt/

relatively large in size or number or extent; larger than others of its kind

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

greatestadjectiveUS /ˈɡreɪtəst/

highest in quality

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

hadauxiliary verbUS /hæd/

the past form of “have”, used to form the past perfect

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

hasauxiliary verbUS /hæz/

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

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

haveauxiliary verbUS /hæv/

used with a past participle to form the perfect tenses

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

how

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

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

IfconjunctionUS /ɪf/

on condition that; in the event that

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

InprepositionUS /ɪn/

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

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

informationnounUS /ˌɪnfərˈmeɪʃən/

a message received and understood

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

instrumentsnounUS /ˈɪnstrəmənts/

plural of “instrument” — a device that requires skill for proper use

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

interestingadjectiveUS /ˈɪntrəstɪŋ/

arousing or holding the attention

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

investigatedverbUS /ˌɪnˈvestəɡeɪtəd/

past form of “investigate” — investigate scientifically

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

isauxiliary verbUS /ɪz/

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

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

itpronounUS /ɪt/

a thing, animal, or idea already mentioned

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

itsdeterminerUS /ɪts/

belonging to the thing or animal already mentioned

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

lanternnounUS /ˈlæntərn/

light in a transparent protective case

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

LIGHTadjectiveUS /laɪt/

of comparatively little physical weight or density

From this reading THE REFRACTION OF LIGHT.

liquidadjectiveUS /ˈlɪkwəd/

existing as or having characteristics of a liquid; especially tending to flow

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

madeadjectiveUS /meɪd/

produced by a manufacturing process

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

magicnounUS /ˈmædʒɪk/

any art that invokes supernatural powers

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

magnifyingverbUS /ˈmæɡnəfaɪɪŋ/

-ing form of “magnify” — increase in size, volume or significance

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

maymodal verbUS /meɪ/

used to say something is possible, or to give permission

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

microscopenounUS /ˈmaɪkrəskoʊp/

magnifier of the image of small objects

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

minoradjectiveUS /ˈmaɪnər/

of lesser importance or stature or rank

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

notadverbUS /nɑːt/

used to make a word, phrase, or sentence negative

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

OFprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading THE REFRACTION OF LIGHT.

oftenadverbUS /ˈɔːfən/

many times at short intervals

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

onprepositionUS /ɑːn/

touching and supported by a surface

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

onepronounUS /wʌn/

used to mean any person in general, including the speaker

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

onlyadverbUS /ˈoʊnli/

and nothing more

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

opera-glasses

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

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

orconjunctionUS /ɔːr/

used to join alternatives or possibilities

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

polarizedverbUS /ˈpoʊləraɪzd/

past form of “polarize” — cause to vibrate in a definite pattern

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

powernounUS /ˈpaʊər/

possession of controlling influence

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

practicaladjectiveUS /ˈpræktəkəl/

concerned with actual use or practice

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

previousadjectiveUS /ˈpriːviəs/

just preceding something else in time or order

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

propertynounUS /ˈprɑːpərti/

something owned; any tangible or intangible possession that is owned by someone

From this reading In the previous chapter the property of the reflection of light has been fully investigated, and in this one refraction only will be considered.

raynounUS /reɪ/

a column of light (as from a beacon)

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

renounUS /reɪ/

a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

reflectedadjectiveUS /rɪˈflektɪd/

(especially of incident sound or light) bent or sent back

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

reflectionnounUS /rɪˈflekʃən/

a calm, lengthy, intent consideration

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

refracted

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

refracting

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

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

REFRACTIONnoun

the change in direction of a propagating wave (light or sound) when passing from one medium to another

From this reading THE REFRACTION OF LIGHT.

rememberedverbUS /rɪˈmembərd/

past form of “remember” — recall knowledge from memory; have a recollection

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

respectingverbUS /riˈspektɪŋ/

-ing form of “respect” — regard highly; think much of

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

revealedverbUS /rɪˈviːld/

past form of “reveal” — make visible

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

sciencenounUS /ˈsaɪəns/

a particular branch of scientific knowledge

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

shouldmodal verbUS /ʃʊd/

used to say what is right, expected, or advisable

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

signifiesverbUS /ˈsɪɡnəfaɪz/

third-person singular of “signify” — denote or connote

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

soconjunctionUS /soʊ/

for that reason; with the result that

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

solelyadverbUS /ˈsoʊəli/

without any others being included or involved

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

solidadjectiveUS /ˈsɑːləd/

characterized by good substantial quality

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

spectaclesnounUS /ˈspektəkəlz/

(plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

substancesnounUS /ˈsʌbstənsəz/

plural of “substance” — the real physical matter of which a person or thing consists

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

suchdeterminerUS /sʌtʃ/

of the kind already mentioned

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

surfacenounUS /ˈsɜːrfəs/

the outer boundary of an artifact or a material layer constituting or resembling such a boundary

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

telescopeverbUS /ˈteləskoʊp/

crush together or collapse

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

termnounUS /tɜːrm/

a word or expression used for some particular thing

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

thatconjunctionUS /ðæt/

used to introduce what somebody said, thought, or felt

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

THEdeterminerUS /ðə/

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

From this reading THE REFRACTION OF LIGHT.

theirdeterminerUS /ðer/

belonging to the people or things already mentioned

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

ThisdeterminerUS /ðɪs/

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

thosedeterminerUS /ðoʊz/

the plural of “that”: the people or things further away, or already known

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

toparticleUS /tuː/

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

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

truthsnounUS /truːθs/

plural of “truth” — a fact that has been verified

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

understandverbUS /ˌʌndərˈstænd/

know and comprehend the nature or meaning of

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

utilitynounUS /juːˈtɪləti/

a company that performs a public service; subject to government regulation

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

viewsnounUS /vjuːz/

plural of “view” — a way of regarding situations or topics etc.

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

wepronounUS /wiː/

the speaker together with one or more other people

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

whatpronounUS /wʌt/

used to ask for information about something

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

whenconjunctionUS /wen/

at the time that

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

whetherconjunctionUS /ˈweðər/

used to introduce two or more possibilities

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

whichpronounUS /wɪtʃ/

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

From this reading It is a property which has been, and will continue to be, of the greatest practical utility in its application to the construction of all magnifying glasses, whether belonging to the telescope, microscope, magic lantern, or the dissolving views; or the minor refracting instruments--such as spectacles, opera-glasses, &c.; and it should be remembered that their magnifying power depends solely on the property of refraction.

willmodal verbUS /wɪl/

used to talk about the future, or about willingness

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

withprepositionUS /wɪð/

in the company of; together with

From this reading This term appears to be often confounded with that of reflection, and signifies the bending or breaking back of a ray of light (_re_, back, and _frango_, to break); and it will be remembered that when light falls on the surface of a solid (either liquid or gaseous) body, it may be reflected (_re_, back, and _flecto_, to bend), refracted, polarized, or absorbed.

wouldmodal verbUS /wʊd/

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

From this reading If substances such as glass had not been endowed with this property, it would be difficult to understand how the great discoveries in the science of astronomy could have been made, or what information we could have gained respecting those interesting truths so constantly revealed by the aid of the microscope.

Chapter 23 of The Boy's Playbook of Science by John Henry Pepper holds 39 sentences, grouped into 8 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 23 of The Boy's Playbook of Science contain?

Chapter 23 holds 39 sentences of The Boy's Playbook of Science, unabridged, divided into 8 reading sections.

This page carries chapter 23 of The Boy's Playbook of Science by John Henry Pepper exactly as it stands in the source edition, without abridgement. It runs to 39 sentences, grouped into 8 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 23 of The Boy's Playbook of Science?

Work through the 8 sections in order, replaying any sentence and tapping unfamiliar words for their entries.

Each of the 8 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 23 be read aloud to me?

Yes — every sentence and every individual word in chapter 23 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.