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Harper's Electricity Book for Boys
Harper's Electricity Book for Boys

Chapter XV

Chapter 15 of Harper's Electricity Book for Boys is here in full — 75 sentences across 15 reading sections, with audio for every sentence and word.

Cover illustration for Harper's Electricity Book for Boys
Context Illustration Reading 1/15 · 5 lines
English subtitles · tap any word to listen 1 / 5
FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.
Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.
The amateur will not need a large number of compounds, but such as are necessary should be of the best.
Those which are described in this chapter can be relied upon to give working results.
Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.
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AI-generated narration by OpenAI · Slow US English
LEARNER DICTIONARY
Archivist
/ˈɑːrkɪvɪst/
Editorial verification pending

A keeper or guardian of historical records and memories.

Harper's Electricity Book for Boys

Chapter XV

Chapter 15 of Harper's Electricity Book for Boys is here in full — 75 sentences across 15 reading sections, with audio for every sentence and word.

Reading 1/15 · 5 reading units · Lines 1–5

Line 1
FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.
Line 2
Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.
Line 3
The amateur will not need a large number of compounds, but such as are necessary should be of the best.
/ðə ˈæmətɜːr wɪl nɑːt niːd ə lɑːrdʒ ˈnʌmbər ʌv ˈkɑːmpaʊndz bʌt sʌtʃ æz ɑːr ˈnesəseri ʃʊd biː ʌv ðə best/
Line 4
Those which are described in this chapter can be relied upon to give working results.
/ðoʊz wɪtʃ ɑːr dɪˈskraɪbd ɪn ðɪs ˈtʃæptər kæn biː rɪˈlaɪd əˈpɑːn tuː ɡɪv ˈwɜːrkɪŋ rɪˈzʌlts/
Line 5
Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

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.

assembling noun US /əˈsembəlɪŋ/

the act of gathering something together

From this reading “FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.”

cement noun US /səˈment/

concrete pavement is sometimes referred to as cement

From this reading “FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.”

compounds noun US /ˈkɑːmpaʊndz/

plural of “compound” — a whole formed by a union of two or more elements or parts

From this reading “FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.”

consistency noun US /kənˈsɪstənsi/

the property of holding together and retaining its shape

From this reading “Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.”

formulas noun US /ˈfɔːrmjələz/

plural of “formula” — a group of symbols that make a mathematical statement

From this reading “Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.”

outfits noun US /ˈaʊtfɪts/

plural of “outfit” — any cohesive unit such as a military company

From this reading “FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.”

shellac noun US /ˈʃelæk/

lac purified by heating and filtering; usually in thin orange or yellow flakes but sometimes bleached white

From this reading “Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.”

substances noun US /ˈsʌbstənsəz/

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

From this reading “FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.”

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.

relied upon verb + particle counted as “rely upon”

put trust in with confidence

In this reading “Those which are described in this chapter can be relied upon to give working results.”

large number adjective + noun

a large indefinite number

In this reading “The amateur will not need a large number of compounds, but such as are necessary should be of the best.”

many things adjective + noun

In this reading “FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.”

make up verb + adjective

form or compose

In this reading “FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.”

All words in this reading · 92

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 The amateur will not need a large number of compounds, but such as are necessary should be of the best.

abundantadjectiveUS /əˈbʌndənt/

present in great quantity

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

AccurateadjectiveUS /ˈækjərət/

conforming exactly or almost exactly to fact or to a standard or performing with total accuracy

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

acid-proof

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

addingverbUS /ˈædɪŋ/

-ing form of “add” — make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

alcoholnounUS /ˈælkəhɑːl/

a liquor or brew containing alcohol as the active agent

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

alongprepositionUS /əˈlɔːŋ/

following the length of something from one end toward the other

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

amateurnounUS /ˈæmətɜːr/

someone who pursues a study or sport as a pastime

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

andconjunctionUS /ənd/

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

apparatusnounUS /ˌæpərˈætəs/

equipment designed to serve a specific function

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

areauxiliary verbUS /ɑːr/

the form of “be” used with you, we, they, or a plural noun

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

asconjunctionUS /æz/

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

assemblingnounUS /əˈsembəlɪŋ/

the act of gathering something together

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

atprepositionUS /æt/

in or near a particular place or position

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

beauxiliary verbUS /biː/

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

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

beenauxiliary verbUS /bɪn/

the past participle of “be”

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

bestnounUS /best/

the supreme effort one can make

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

butconjunctionUS /bʌt/

used to introduce something that contrasts with what came before

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

byprepositionUS /baɪ/

showing who or what does the action

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

canmodal verbUS /kæn/

to be able to, or to be allowed to

From this reading Those which are described in this chapter can be relied upon to give working results.

cementnounUS /səˈment/

concrete pavement is sometimes referred to as cement

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

Cements

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

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

chapternounUS /ˈtʃæptər/

a subdivision of a written work; usually numbered and titled

From this reading Those which are described in this chapter can be relied upon to give working results.

completeverbUS /kəmˈpliːt/

come or bring to a finish or an end

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

compoundsnounUS /ˈkɑːmpaʊndz/

plural of “compound” — a whole formed by a union of two or more elements or parts

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

consistencynounUS /kənˈsɪstənsi/

the property of holding together and retaining its shape

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

constructionnounUS /kənˈstrʌkʃən/

the act of constructing something

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

describedadjectiveUS /dɪˈskraɪbd/

represented in words especially with sharpness and detail

From this reading Those which are described in this chapter can be relied upon to give working results.

directionsnounUS /dərˈekʃənz/

plural of “direction” — a line leading to a place or point

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

dissolvedadjectiveUS /dɪˈzɑːlvd/

(of solid matter) reduced to a liquid form

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

electricaladjectiveUS /ɪˈlektrɪkəl/

relating to or concerned with electricity

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

expensenounUS /ɪkˈspens/

amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures)

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

experienceverbUS /ɪkˈspɪriəns/

undergo or live through a difficult experience

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

forprepositionUS /fɔːr/

intended to be given to, or used by, somebody

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

formulasnounUS /ˈfɔːrmjələz/

plural of “formula” — a group of symbols that make a mathematical statement

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

FORMULÆ

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

giveverbUS /ɡɪv/

cause to have, in the abstract sense or physical sense

From this reading Those which are described in this chapter can be relied upon to give working results.

grainnounUS /ɡreɪn/

a relatively small granular particle of a substance

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

hadauxiliary verbUS /hæd/

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

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

haveauxiliary verbUS /hæv/

used with a past participle to form the perfect tenses

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

InprepositionUS /ɪn/

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

indicateverbUS /ˈɪndəkeɪt/

be a signal for or a symptom of

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

isauxiliary verbUS /ɪz/

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

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

itpronounUS /ɪt/

a thing, animal, or idea already mentioned

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

largeadjectiveUS /lɑːrdʒ/

above average in size or number or quantity or magnitude or extent

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

linesnounUS /laɪnz/

plural of “line” — a formation of people or things one beside another

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

madeadjectiveUS /meɪd/

produced by a manufacturing process

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

makeverbUS /meɪk/

engage in

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

manyadjectiveUS /ˈmeni/

a quantifier that can be used with count nouns and is often preceded by “as” or “too” or “so” or “that”; amounting to a large but indefinite number

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

materialsnounUS /məˈtɪriəlz/

plural of “material” — the tangible substance that goes into the makeup of a physical object

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

necessaryadjectiveUS /ˈnesəseri/

absolutely essential

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

neednounUS /niːd/

a condition requiring relief

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

non-conductingadjective

not able to conduct heat or electricity or sound

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

notadverbUS /nɑːt/

used to make a word, phrase, or sentence negative

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

numbernounUS /ˈnʌmbər/

the property possessed by a sum or total or indefinite quantity of units or individuals

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

ofprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

OnepronounUS /wʌn/

used to mean any person in general, including the speaker

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

others

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

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

outfitsnounUS /ˈaʊtfɪts/

plural of “outfit” — any cohesive unit such as a military company

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

paintverbUS /peɪnt/

make a painting

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

partsnounUS /pɑːrts/

the local environment

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

putverbUS /pʊt/

put into a certain place or abstract location

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

red-lead

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

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

reliedverbUS /rɪˈlaɪd/

inflected form of “rely” — have faith or confidence in

From this reading Those which are described in this chapter can be relied upon to give working results.

resultsnounUS /rɪˈzʌlts/

plural of “result” — a phenomenon that follows and is caused by some previous phenomenon

From this reading Those which are described in this chapter can be relied upon to give working results.

rightadverbUS /raɪt/

precisely, exactly

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

saveprepositionUS /seɪv/

except for; apart from

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

shellacnounUS /ˈʃelæk/

lac purified by heating and filtering; usually in thin orange or yellow flakes but sometimes bleached white

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

shouldmodal verbUS /ʃʊd/

used to say what is right, expected, or advisable

From this reading The amateur will not need a large number of compounds, but such as are necessary should be of the best.

sinceprepositionUS /sɪns/

from a time in the past until now

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

substancesnounUS /ˈsʌbstənsəz/

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

suchdeterminerUS /sʌtʃ/

of the kind already mentioned

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

testnounUS /test/

trying something to find out about it

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

thatconjunctionUS /ðæt/

used to introduce what somebody said, thought, or felt

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

thedeterminerUS /ðə/

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

thereadverbUS /ðer/

in or at that place or location

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

thesedeterminerUS /ðiːz/

the plural of “this”: the people or things near, or just mentioned

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

theypronounUS /ðeɪ/

the people, animals, or things already mentioned, as the subject

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

thingsnounUS /θɪŋz/

any movable possession (especially articles of clothing)

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

thisdeterminerUS /ðɪs/

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

From this reading Those which are described in this chapter can be relied upon to give working results.

ThosedeterminerUS /ðoʊz/

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

From this reading Those which are described in this chapter can be relied upon to give working results.

timenounUS /taɪm/

an instance or single occasion for some event

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

toparticleUS /tuː/

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

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

troublenounUS /ˈtrʌbəl/

a source of difficulty

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

untilprepositionUS /ənˈtɪl/

up to a particular time

From this reading Acid-proof Cements One of the best acid-proof cements is made by adding shellac, dissolved in grain alcohol, to red-lead until it is at the right consistency.

upadjectiveUS /ʌp/

being or moving higher in position or greater in some value; being above a former position or level

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

uponprepositionUS /əˈpɑːn/

a formal word for “on”

From this reading Those which are described in this chapter can be relied upon to give working results.

wearverbUS /wer/

be dressed in

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

whichpronounUS /wɪtʃ/

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

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

whopronounUS /huː/

which person or people

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

willmodal verbUS /wɪl/

used to talk about the future, or about willingness

From this reading Accurate formulas and directions for these things will save the amateur trouble and expense, since they indicate the materials which have been put to the test of time and wear by others who have had abundant experience along these lines.

workingadjectiveUS /ˈwɜːrkɪŋ/

actively engaged in paid work

From this reading FORMULÆ In the construction of electrical apparatus there are many things, such as paint, cement, non-conducting compounds, and acid-proof substances, that are necessary in assembling the parts which make up complete working outfits.

Chapter 15 of Harper's Electricity Book for Boys by Joseph H. (Joseph Henry) Adams holds 75 sentences, grouped into 15 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 15 of Harper's Electricity Book for Boys contain?

Chapter 15 holds 75 sentences of Harper's Electricity Book for Boys, unabridged, divided into 15 reading sections.

This page carries chapter 15 of Harper's Electricity Book for Boys by Joseph H. (Joseph Henry) Adams exactly as it stands in the source edition, without abridgement. It runs to 75 sentences, grouped into 15 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 15 of Harper's Electricity Book for Boys?

Work through the 15 sections in order, replaying any sentence and tapping unfamiliar words for their entries.

Each of the 15 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 15 be read aloud to me?

Yes — every sentence and every individual word in chapter 15 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 Harper's Electricity Book for Boys

Common questions about reading Harper's Electricity Book for Boys by Joseph H. (Joseph Henry) Adams on this page, its source edition and its audio.

Is this the complete text of Harper's Electricity Book for Boys?

Yes. All 4571 sentences of Project Gutenberg eBook #64592 are kept, with a record of which sentences cover which part.

Which edition of Harper's Electricity Book for Boys is used?

Project Gutenberg eBook #64592, unabridged. The Project Gutenberg header, footer and licence are removed.

How long does Harper's Electricity Book for Boys take to read?

About 380 minutes of reading across 915 sections of 5 sentences each, at an unhurried pace.

How to read Harper's Electricity Book for Boys section by section

How to work through Harper's Electricity Book for Boys section by section, using the audio and the tap-to-define vocabulary.

  1. Open a chapter

    Choose one of the 16 chapters of Harper's Electricity Book for Boys 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 Harper's Electricity Book for Boys

Words and structures a reader meets early in Harper's Electricity Book for Boys, each tappable for pronunciation and meaning.

Printed
A word that appears in the opening chapter of Harper's Electricity Book for Boys; the reader can tap it to hear it and see its dictionary entry.
Italics
A word that appears in the opening chapter of Harper's Electricity Book for Boys; the reader can tap it to hear it and see its dictionary entry.
Transcribed
A word that appears in the opening chapter of Harper's Electricity Book for Boys; the reader can tap it to hear it and see its dictionary entry.
Between
A word that appears in the opening chapter of Harper's Electricity Book for Boys; the reader can tap it to hear it and see its dictionary entry.