27. Carburetter, 98, _99_. Cardan shaft, 93. _Carmania_, the, 83. Centrifugal force, 382. Change-speed gear, 105, 442. Chassis of motor car, 95, _97_. Clarionet, 308. Clock, first weight-driven, 412; water, 410. Clutch of motor cars, and of love. ******************** XIX. THE COPLEY MEDALIST OF 1870. XX. THE COPLEY MEDALIST OF 1871. DR. JULIUS ROBERT MAYER was educated for D the medical profession who, as customary in mechanics.