93. _Carmania_, the, 83. Centrifugal force, 382. Change-speed gear, 105, 442. Chassis of motor car, 105. Gearing of cycle, 439. Glaisher, 348. Gland, 50, 363. Glass, flint and crown, 242. Going-barrel for watches, 415. Gooch reversing gear, 65. Governors, speed, 67; of motor car, 105. Coal, as fuel, 15; gas, 394; gas plant, _396_; gas, purification of, 397. Cochlea, 273.