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Scottish National Dictionary (1700–)
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About this entry:
First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
PHOTOPHONE. An apparatus for transmitting sounds like a telephone by means of a beam of reflected light, invented and named by A. G. Bell (see Bel) and the American Summer Tainter (1880 A. G. Bell in Jnl. Franklin Instit. CX. 246).
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"Photophone ". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 19 Dec 2025 <http://www.dsl.ac.uk/entry/snd/snd00090183>
