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Scientific American, Vol. 70, No. 5 (February 1894) (1894)

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An illustration from Scientific American, Vol. 70, No. 5 (February 1894), 1894, leaf 0
le conditions, perspective and sectional views of the latest and most pole piece, e, at one end, and the soft iron distance over a line eight or ten miles long, no battery being re- improved form of telephone, all of the parts of which piece, d, at the opposite end, the magnets being quired. are… … DETAILS OF CONSTRUCTION OF THE BELL TELEPHONE. ©1894 SCIENTIFIC AMERICAN, INC.

Munn · Rubies · Ruby · Device · Connected · Scientific American · Motor · Electric current · Binding posts · Horse power · Meteorological station · Years ago · Large number · Express money · Largest circulation · American supplement

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