File:Photographing Sound in 1884. A rare photograph taken at Volta Laboratory by J. Harris Rogers, a friend of Bell and Tainter (Smithsonian photo 44312-E) i009.jpg
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current | 00:47, 18 March 2010 | 801 × 507 (88 KB) | Harryzilber | {{Information |Description={{en|1=A description of the procedure used is found on page 67, of Tainter's unpublished autobiography. There, Tainter quotes Chichester Bell as follows: "A jet of bichromate of potash solution, vibrated by the voice, was direc |
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