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Balance--The cylinder escapement--The lever escapement--Compensated balance-wheels--Keyless winding mechanism for watches, 425. Rods of Corti, 274. Ruhmkorff coil, 123. Conduit, 176. Convex lens, image cast by, _236_. Conjugate foci, 262. Cornet, 308. Corti, rods of, 274.