Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 541
External appearance of BellTelephone. … a Bobbin ofcoil wire round magnet, i. Dia-phragm, c. Mouthpiece, d. Permanent™gn«. f. Wires to binding screws.f. Both wires as one for convenience,.r- Adjusting screw-holding magnet. into sound. The accompanying illustrations {see page 182)show Mr. Bells Telephone as described. The Telephone,…
Scientific recreations
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