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The telephone: an account of the phenomena of electricity, magnetism, and sound, as involved in its action (1877)

Dolbear, A[mos] E[merson], 1837- [from old catalog] · Boston, Lee & Shepard; New York, C. T. Dillingham · leaf 139

An illustration from The telephone: an account of the phenomena of electricity, magnetism, and sound, as involved in its action, 1877, leaf 139
of the country ought to make the youthquite familiar with the general principles ofphysical science, that the inventive ones — andthere are many such — may apply them intelli-gently. Mechanism is all that stands betweenus and aerial navigation; all that is necessary toreproduce human speech in… … •

Telephone

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