PHOTOPHONE
Source: 567
Pho″to‐phone (?), n. [[Photo- + Gr. � sound.]] (Physics) An apparatus for the production of sound by the action of rays of light. A. G. Bell.
Source: 567
Pho″to‐phone (?), n. [[Photo- + Gr. � sound.]] (Physics) An apparatus for the production of sound by the action of rays of light. A. G. Bell.