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 31
indicate itsdirection. If the mag-net be now withdrawn,a current will move inthe opposite directionthrough the whole cir-cuit. The electricity FIG. 2. that is thus originated is said to be induced. The quantity of electricitythat can be induced thus is almost unlimited,depending upon the size and… … MAGNETIC INDUCTION. 27 permanent magnets. They are generally calledmagneto-electric machines. The action involvedin these machines is so important in its bearingupon telephony as to necessitate a fuller descrip-tion of them. MAGNETIC INDUCTION. Let N S, Fig. 3, be a bar of hardened steel ren-dered…
Telephone
Internet Archive · Prelinger Library · Public Domain Mark 1.0. Free to use for anything.
