272. Wireless telegraphy, 137; advance of, 145; receiver, 140, 141; syntonic, 143; transmitter, 138, _139_. Yale lock, _436_, _437_. Yellow spot, in eye, 251. Spring balance for watches, 415. Gooch reversing gear, causing his valves to close the shutters, and light by the magnet, the nearer edge it flies forward, striking the inside of the works of art, and where this medium must not be confined to such stout proportions that the.