Chapter 21 of How Two Boys Made Their Own Electrical is here in full — 80 sentences across 16 reading sections, with audio for every sentence and word.
A keeper or guardian of historical records and memories.
Chapter XXI
Chapter 21 of How Two Boys Made Their Own Electrical is here in full — 80 sentences across 16 reading sections, with audio for every sentence and word.
ODDS AND ENDS. APPARATUS 148. _272. Graduated Circles._ Fig. 123. For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
Chapter 21 of How Two Boys Made Their Own Electrical is here in full — 80 sentences across 16 reading sections, with audio for every sentence and word.
Reading 1/16 · 5 reading units · Lines 1–5
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.
equipment designed to serve a specific function
From this reading “APPARATUS 148.”
plural of “circle” — ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point
From this reading “Graduated Circles._ Fig. 123.”
a relation between things or events (as in the case of one causing the other or sharing features with it)
From this reading “For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.”
plural of “end” — either extremity of something that has length
From this reading “ODDS AND ENDS.”
a diagram or picture illustrating textual material
From this reading “Graduated Circles._ Fig. 123.”
marked with or divided into degrees
From this reading “Graduated Circles._ Fig. 123.”
the likelihood of a thing occurring rather than not occurring
From this reading “ODDS AND ENDS.”
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 “For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.”
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.
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.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading Graduated Circles._ Fig. 123.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading APPARATUS 148.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading _272.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
used before a singular noun to mean one of a group, when it is not a particular one
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
used to join words or parts of a sentence that go together
From this reading ODDS AND ENDS.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
equipment designed to serve a specific function
From this reading APPARATUS 148.
ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
plural of “circle” — ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point
From this reading Graduated Circles._ Fig. 123.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
a relation between things or events (as in the case of one causing the other or sharing features with it)
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
plural of “end” — either extremity of something that has length
From this reading ODDS AND ENDS.
a diagram or picture illustrating textual material
From this reading Graduated Circles._ Fig. 123.
intended to be given to, or used by, somebody
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
marked with or divided into degrees
From this reading Graduated Circles._ Fig. 123.
inside something, or within a place, period, or state
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
the form of “be” used with he, she, it, or a singular noun
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
absolutely essential
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
the likelihood of a thing occurring rather than not occurring
From this reading ODDS AND ENDS.
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 For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
the act of using
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
in the company of; together with
From this reading For compasses (App. 67), and for use in connection with tangent galvanometers (App. 116), a graduated circle is necessary.
Chapter 21 of How Two Boys Made Their Own Electrical by Thomas M. (Thomas Matthew) St. John holds 80 sentences, grouped into 16 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.
Chapter 21 holds 80 sentences of How Two Boys Made Their Own Electrical, unabridged, divided into 16 reading sections.
This page carries chapter 21 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 80 sentences, grouped into 16 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.
Work through the 16 sections in order, replaying any sentence and tapping unfamiliar words for their entries.
Each of the 16 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.
Yes — every sentence and every individual word in chapter 21 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.
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.
Yes. All 2964 sentences of Project Gutenberg eBook #28335 are kept, with a record of which sentences cover which part.
Project Gutenberg eBook #28335, unabridged. The Project Gutenberg header, footer and licence are removed.
About 247 minutes of reading across 593 sections of 5 sentences each, at an unhurried pace.
How to work through How Two Boys Made Their Own Electrical section by section, using the audio and the tap-to-define vocabulary.
Choose one of the 22 chapters of How Two Boys Made Their Own Electrical to begin.
Each section holds 5 sentences; read it once through.
Play the section aloud, then tap any unfamiliar word for its entry.
Words and structures a reader meets early in How Two Boys Made Their Own Electrical, each tappable for pronunciation and meaning.
