Online Resource Library
Commentary Index | Return to PrayerRequest.com | DownloadNoah Webster Dictionary (1913 edition): Thermophone
Subjects in this Topic:
(1):
(n.) A portable form of telethermometer, using a telephone in connection with a differential thermometer.
(2):
(n.) A telephone involving heat effects, as changes in temperature (hence in length) due to pulsations of the line current in a fine wire connected with the receiver diaphragm.