Radiophone, an instrument, essentially similar in principle to the Photophone (q.v.), for producing sound by means of heat rays.
Radiophone
Chambers's Encyclopaedia, Volume 8: Peasant to Eoumelia, p. 548
Source scan(s): p. 0559
Radiophone, an instrument, essentially similar in principle to the Photophone (q.v.), for producing sound by means of heat rays.