Inside Out Library · Explore
Scientific American, Vol. 88, No. 17 (1903) (1903)
leaf 8
record in the form of magnetization induced on it by a small two-pole electro-mag- net which is used in place of the tele- phone receiver of an ordinary tele- phone circuit. The magnet travels along horizontally, touching the steel wire, while the cylinder revolves as magnets ; E, electric motor, A… … part of those generated by the origi- © 1903 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
More pictures from Scientific American, Vol. 88, No. 17 (1903)
More like this
