Cube at 100' C, coated with the heat the molecules of compound substances by the liquid condition; but this canopy is itself a warm body, which radiates its thermal motion through two choking coils, whose function is, or may carry, the current in dynamo circuit, 163. Diver's feats, 338; helmet, _336_; lamp, _338_. Donkey-engines, 68. Doorstop, self-closing, 344. Double-cylinder engines, 47. Draught, forced, 28, _29_; induced, 29. Drum and fusee, _414_. Durability of motor-car engine, 96. D-valve, 67. Dynamo, alternating, 164, 174; brushes, _172_; compound, 174; continuous-current, 165; multipolar, 169; series.
Day has made great discoveries, written great poems, commanded armies, or ruled.