28
Wireless Telegraphy
with a telephone receiver, the telephone being sensitive to very weak currents of electricity, which are made manifest by a “noise’” in the telephone receiver. This
Fig. 13.—Detector Mounted on Wave Meter.
noise, or buzzing sound, corresponds to the sound of the spark at the sending station; thus an operator may often recognize a distant station by the sound of the “‘spark”’ in his telephone receiver.
