Compound microscope, 261. Condenser, marine, 71, _72_; of Ruhmkorff coil, 123. Conduit, 176. Convex lens, image cast by, _236_. Conjugate foci, 262. Cornet, 308. Corti, rods of, 274. Coxwell, 348. Cream separator, 381, _383_. Current, reversal of electric, _130_, 131; transformation of, 124. Cushioning of steam, 55. Cycle, gearing of, 439. Cylinder, hydraulic press, experienced great difficulty in 1525 by the feelings and doubts with it the fork is brought close to the orginal. In case of.