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Scientific American, Vol. 57, No. 9 (1887) (1887)

leaf 4

An illustration from Scientific American, Vol. 57, No. 9 (1887), 1887, leaf 4
s a holder or shallow space to receive the According to the Electrician, the word -microphone to the cloth, thus avoiding mistakes and reducing to a minimum the labor of measuring and cutting. edge there are fitted, in shallow recesses on the face of invented by Wheatstone, and designed to render… … and the can body ‘slid endwise off from the former. This arm is held in closed position by a catch, and the crank shaft is. prevented from being turned in the wrong direc- tion by a catch attached to the main frame, and adapt- The word telephone was used in 1845 to designate an apparatus invented…

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