Semicircular, 273. Capillary attraction, 392; veins, 358. Carbon dioxide, 27, 359; monoxide, 27. Carburetter, 98, _99_. Cardan shaft, 93. _Carmania_, the, 83. Centrifugal force, 382. Change-speed gear, 105, 442. Chassis of motor cars, 110. Spot, blind, in eye, 251. Spring balance for watches, 425. Rods of Corti, 274. Ruhmkorff coil, 121, _122_.