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The Voice by wire and post-card. All about the telephone and phonograph : containing description of Bell's and Dolbear's telephones and Edison's phonograph .. (1875)

Wykes, W.M. · London : Ward, Lock and Co. ... · leaf 54

An illustration from The Voice by wire and post-card. All about the telephone and phonograph : containing description of Bell's and Dolbear's telephones and Edison's phonograph .., 1875, leaf 54
57 and Phonograph. trumpet). These two parts are screwed together, and the latter is cut away at the centre, so as to expose a … portion of the iron plate about half an inch in diameter. The best thickness of the iron plate is

Telephone · Popular works · Phonograph · Telephone -- Popular works · Phonograph -- Popular works

Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.

More pictures from The Voice by wire and post-card. All about the telephone and phonograph : containing description of Bell's and Dolbear's telephones and Edison's phonograph ..

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