A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 1034
ue to A. GrahamBell known as the telephone.The sound waves arriving atthe thin sheet-iron diaphragm A(Fig. 951) causing it to vibrate,a compression of the air (p. 682) driving it inwards and a rarefactioncausing it to bulge outwards. Behind the diaphragm is a permanenthorseshoe magnet NS, provided… … Fir;. 950.—Siphon recorder.
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
