Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 249
follows : Whena person speaks into the mouthpiece T,the sound waves, produced in the air,make the thin, flexible diaphragm vibrate,and with it the carbon plate fastened atthe back. When the plate moves in,the carbon granules are forced more closely together; andwhen it moves out, they are less… … FIG. 168.—The trans-mitter.
Physics · Home Economics
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
