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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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Original file(801 × 507 pixels, file size: 88 KB, MIME type: image/jpeg)

Summary

Description
A description of the procedure used is found on page 67, of Tainter's unpublished autobiography.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 directed against a glass plate immediately in front of a slit, on which light was concentrated by means of a lens. The jet was so arranged that the light on its way to the slit had to pass through the nappe and as the thickness of this was constantly changing, the illumination of the slit was also varied. By means of a lens ... an image of this slit was thrown upon a rotating gelatine-bromide plate, on which accordingly a record of the voice vibrations was obtained."
Date
Source Library Of Congress (US)
Author J. Harris Rogers

Licensing

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Date/TimeThumbnailDimensionsUserComment
current00:47, 18 March 2010Thumbnail for version as of 00:47, 18 March 2010801 × 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KB)Harryzilber{{Information |Description={{en|1=A description of the procedure used is found on page 67, of Tainter's unpublished autobiography.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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