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How Two Boys Made Their Own Electrical
How Two Boys Made Their Own Electrical

Chapter XVII · Chapter 17

Chapter 17 of How Two Boys Made Their Own Electrical is here in full — 58 sentences across 12 reading sections, with audio for every sentence and word.

By Thomas M. (Thomas Matthew) St. John • Curated US English Learning Edition
Cover illustration for How Two Boys Made Their Own Electrical
Context Illustration Reading 1/11 · 5 lines
English subtitles · tap any word to listen 1 / 5
COMMUTATORS AND CURRENT REVERSERS.
_224.
Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.
The use of commutators on motors and dynamos should be understood.
The reversers herein shown are, of course, not at all like those used on motors.
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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.

How Two Boys Made Their Own Electrical

Chapter XVII · Chapter 17

Chapter 17 of How Two Boys Made Their Own Electrical is here in full — 58 sentences across 12 reading sections, with audio for every sentence and word.

Reading 1/11 · 5 reading units · Lines 1–5

Line 1
COMMUTATORS AND CURRENT REVERSERS.
Line 2
_224.
Line 3
Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.
Line 4
The use of commutators on motors and dynamos should be understood.
Line 5
The reversers herein shown are, of course, not at all like those used on motors.

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.

coil noun US /kɔɪl/

a structure consisting of something wound in a continuous series of loops

From this reading “Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1
current noun US /ˈkɜːrənt/

a flow of electricity through a conductor

From this reading “COMMUTATORS AND CURRENT REVERSERS.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1
experiments noun US /ɪkˈsperəmənts/

plural of “experiment” — the act of conducting a controlled test or investigation

From this reading “Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1
herein adverb US /hɪˈrɪn/

in this place or thing or document

From this reading “The reversers herein shown are, of course, not at all like those used on motors.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1
motors noun US /ˈmoʊtərz/

plural of “motor” — machine that converts other forms of energy into mechanical energy and so imparts motion

From this reading “The use of commutators on motors and dynamos should be understood.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1
readings noun US /ˈriːdɪŋz/

plural of “reading” — the cognitive process of understanding a written linguistic message

From this reading “Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1
reversed adjective US /rɪˈvɜːrst/

turned inside out and resewn

From this reading “Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1
tangent noun US /ˈtændʒənt/

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

From this reading “Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.”

CMU Pronouncing Dictionary · Princeton WordNet 3.1

All words in this reading · 48

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.

116

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Pending verification
117

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Pending verification
224

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

From this reading _224.

Pending verification
againadverbUS /əˈɡen/

anew

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
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 The reversers herein shown are, of course, not at all like those used on motors.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
ANDconjunctionUS /ənd/

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

From this reading COMMUTATORS AND CURRENT REVERSERS.

Velmora grammar entry · CMU Pronouncing Dictionary
App

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Pending verification
areauxiliary verbUS /ɑːr/

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
aroundprepositionUS /ərˈaʊnd/

surrounding, or on every side of, something

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
asconjunctionUS /æz/

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
atprepositionUS /æt/

in or near a particular place or position

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
beauxiliary verbUS /biː/

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

From this reading The use of commutators on motors and dynamos should be understood.

Velmora grammar entry · CMU Pronouncing Dictionary
coilnounUS /kɔɪl/

a structure consisting of something wound in a continuous series of loops

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
COMMUTATORS

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

From this reading COMMUTATORS AND CURRENT REVERSERS.

Pending verification
coursenounUS /kɔːrs/

education imparted in a series of lessons or meetings

From this reading The reversers herein shown are, of course, not at all like those used on motors.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
CURRENTnounUS /ˈkɜːrənt/

a flow of electricity through a conductor

From this reading COMMUTATORS AND CURRENT REVERSERS.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
directionnounUS /dərˈekʃən/

a line leading to a place or point

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
dynamos

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

From this reading The use of commutators on motors and dynamos should be understood.

Pending verification
examplenounUS /ɪɡˈzæmpəl/

an item of information that is typical of a class or group

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
experimentsnounUS /ɪkˈsperəmənts/

plural of “experiment” — the act of conducting a controlled test or investigation

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
forprepositionUS /fɔːr/

intended to be given to, or used by, somebody

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
galvanometers

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Pending verification
hereinadverbUS /hɪˈrɪn/

in this place or thing or document

From this reading The reversers herein shown are, of course, not at all like those used on motors.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
inprepositionUS /ɪn/

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
likeverbUS /laɪk/

prefer or wish to do something

From this reading The reversers herein shown are, of course, not at all like those used on motors.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
madeadjectiveUS /meɪd/

produced by a manufacturing process

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
motorsnounUS /ˈmoʊtərz/

plural of “motor” — machine that converts other forms of energy into mechanical energy and so imparts motion

From this reading The use of commutators on motors and dynamos should be understood.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
notadverbUS /nɑːt/

used to make a word, phrase, or sentence negative

From this reading The reversers herein shown are, of course, not at all like those used on motors.

Velmora grammar entry · CMU Pronouncing Dictionary
ofprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading The use of commutators on motors and dynamos should be understood.

Velmora grammar entry · CMU Pronouncing Dictionary
onprepositionUS /ɑːn/

touching and supported by a surface

From this reading The use of commutators on motors and dynamos should be understood.

Velmora grammar entry · CMU Pronouncing Dictionary
onceadverbUS /wʌns/

on one occasion

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
onepronounUS /wʌn/

used to mean any person in general, including the speaker

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
passingnounUS /ˈpæsɪŋ/

(American football) a play that involves one player throwing the ball to a teammate

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
readingsnounUS /ˈriːdɪŋz/

plural of “reading” — the cognitive process of understanding a written linguistic message

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
reversedadjectiveUS /rɪˈvɜːrst/

turned inside out and resewn

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
REVERSERS

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

From this reading COMMUTATORS AND CURRENT REVERSERS.

Pending verification
shouldmodal verbUS /ʃʊd/

used to say what is right, expected, or advisable

From this reading The use of commutators on motors and dynamos should be understood.

Velmora grammar entry · CMU Pronouncing Dictionary
shownverbUS /ʃoʊn/

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

From this reading The reversers herein shown are, of course, not at all like those used on motors.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
someadjectiveUS /sʌm/

(quantifier) used with either mass nouns or plural count nouns to indicate an unspecified number or quantity

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
tangentnounUS /ˈtændʒənt/

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
thedeterminerUS /ðə/

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
thosedeterminerUS /ðoʊz/

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
understoodadjectiveUS /ˌʌndərˈstʊd/

fully apprehended as to purport or meaning or explanation

From this reading The use of commutators on motors and dynamos should be understood.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
usenounUS /juːs/

the act of using

From this reading The use of commutators on motors and dynamos should be understood.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
usedadjectiveUS /juːzd/

employed in accomplishing something

From this reading The reversers herein shown are, of course, not at all like those used on motors.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
usefuladjectiveUS /ˈjuːsfəl/

being of use or service

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

CMU Pronouncing Dictionary · Princeton WordNet 3.1
whichpronounUS /wɪtʃ/

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

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary
withprepositionUS /wɪð/

in the company of; together with

From this reading Commutators and Current Reversers_ are useful in some experiments, as, for example, those with tangent galvanometers (App. 116, 117), in which readings are made with the current passing around the coil in one direction, and again made at once with the current reversed.

Velmora grammar entry · CMU Pronouncing Dictionary

Chapter 17 of How Two Boys Made Their Own Electrical by Thomas M. (Thomas Matthew) St. John holds 58 sentences, grouped into 12 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 17 of How Two Boys Made Their Own Electrical contain?

Chapter 17 holds 58 sentences of How Two Boys Made Their Own Electrical, unabridged, divided into 12 reading sections.

This page carries chapter 17 of How Two Boys Made Their Own Electrical by Thomas M. (Thomas Matthew) St. John exactly as it stands in the source edition, without abridgement. It runs to 58 sentences, grouped into 12 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 17 of How Two Boys Made Their Own Electrical?

Work through the 12 sections in order, replaying any sentence and tapping unfamiliar words for their entries.

Each of the 12 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 17 be read aloud to me?

Yes — every sentence and every individual word in chapter 17 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 How Two Boys Made Their Own Electrical

Common questions about reading How Two Boys Made Their Own Electrical by Thomas M. (Thomas Matthew) St. John on this page, its source edition and its audio.

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Which edition of How Two Boys Made Their Own Electrical is used?

Project Gutenberg eBook #28335, unabridged. The Project Gutenberg header, footer and licence are removed.

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About 247 minutes of reading across 593 sections of 5 sentences each, at an unhurried pace.

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Vocabulary met early in How Two Boys Made Their Own Electrical

Words and structures a reader meets early in How Two Boys Made Their Own Electrical, each tappable for pronunciation and meaning.

Thomas
A word that appears in the opening chapter of How Two Boys Made Their Own Electrical; the reader can tap it to hear it and see its dictionary entry.
Contains
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Pages
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Illustrations
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