Abstract
IT may be of interest to readers of the Note in NATURE of September 29, p. 161, to learn that the photo-electrical equipment of the “speaking-film” is quite new. It consists of an antimonite cell, and was constructed especially for this purpose by the present writer. A fragment of a single crystal of the mineral antimonite (found in Japan and Borneo) is connected to electrodes (of very large surface) in such a manner that air and humidity are excluded. An even flow of current is thus attained and the sudden, unexpected jerks which formerly destroyed the acoustic effect are avoided.
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GRIPENBERG, W. The Film-Photophone. Nature 108, 307 (1921). https://doi.org/10.1038/108307a0
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DOI: https://doi.org/10.1038/108307a0
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