Page:Motors and motor-driving (1902).djvu/489

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*Densitometer for determining specific gravity of petrol, 166
 * Deprez, M. Marcel, 11, 390
 * Derby motor bicycle, the, 316
 * Deutscher Automobil Club, head-quarters, officers, &c., 394
 * Dover, exhibition of motors at, 366
 * Dress, ladies,' for motoring, 60; for long journeys, 67; underclothing, gown and coat, 68; head covering, 69; veil, 70, 71
 * Dress, men's, for motoring, 72; cloth suit lined with punctured chamois leather, 73; underclothing, 73; overcoats, 73; dust-coats, 74; waterproof tent-shaped coat, 74; rugs, 74; coat built to avoid the use of rugs, 75; device to secure dry seats, and avoid rain, 75; waterproof kilt, 76; snow boots, 76; hats, 76; gloves, 77; goggles, 77, 81; warm clothing, 82
 * Dubrulle mechanical lubricator, the, for petrol motors, 172
 * Dundonald, Lord, and carriage warming, 54
 * Duryea transmission gear, 198, 199


 * and Swan Co.'s electric lamps for motor-houses, 87
 * Edmunds, Mr.: tale of a sideslip, 372
 * Electric cars, construction of, 276; principle of propulsion, 277; description of the ordinary magnet, 277; effects and action of the electric current, 278; magnetic conditions produced by the electric current, 279; production of rotary pull or torque, 281, 298; current conveyed to the drum armature, 282; two-pole electric motors, 283; shunt-wound and series-wound motors, 284-286; compound motors, 284; four-pole motors, 286; qualities of the modern electric motor, 287; source of electricity to feed motors and secure propulsion, 287; primary batteries, 287; description of the ordinary galvanic battery, 288; the Bunsen battery, 289; process of the secondary battery, or accumulator, in supplying the motor with electricity, 289; lowest point of discharge, 289; recharging the accumulator, 290; pasted plates in accumulators, 290; Planté batteries, 290; process of manufacture of an accumulator cell, 290-293; accommodation of the battery of accumulators to power of motors, 293; overloading accumulator and motor, 293; nesting-boxes for accumulators, 294; arrangement of running gear of a car, 294-295; the controller, 295; differences of structure in running gear and controlling arrangements, 296; one and two motor vehicles contrasted, 297; principle of separate excitation, 298; differences of speed arranged by