None
Return-loop wiring scheme, 292 Rheostat, starting, the, 112 Ring armature, the, 418 Safety, personal, rules for, 133 Series connections, 24 generator and motor compared, 96 connections of, 78 the, 46 _grouping of glow lamps, 266 motor, the, 118 parallel controller, 121 system of distribution, 266 Shades, lamp, 338 Shunt booster, the, 257 generator and motor compared, 95 connections of, 79 the, 45 motor, IOI speed control of, 105 regulation of, 104 starting, 112 Siemens’ law of efficiency of a motor, 99 Sign, algebraic, of magnet pole, 3 Simplex armature winding, 429 INDEX. Size of wires for electric distribution, 275 Solenoid, definition of, 19 Sparking of dynamos, 151 conditions of, 161 Specific gravity (see density). resistance, 21 Spectro-photometry, 309 Speed control of motors, comparison of. methods, 109 of shunt motor, 105 regulation of shunt motor, 104 Speeds of dynamos, 145 Standard lamps, 310 ratings and guarantees, 164 Starting a generator or motor, method of, 174 of shunt motor, 112 rheostat, the, 112 Steam power, cost of, 221 Steel and iron wire, weights and resis- tances of, 307 magnetic properties of, 365 Storage batteries, management and care of, 250 use of, 254 weights and costs, 250 battery, action of, 242-247 grids, 247 the, 242 cell, the, 242 Stray power loss in generators and motors, 129, 130 Street lighting, 325 Table of armature-winding conditions, 436 candle-power and efficiency of glow lamps, 344 carrying capacities, 284 costs of installation, 230 » of operation, 231 density of wires, 283 hysteretic coefficients, 380 magnetic: properties of iron and steel, 365 resistances and weights of copper wires, 306 —— a INDEX. 517 Table of tensile strengths of wood, 278 of wires, 283 units, 34 Tantalum lamp, the; 348 Tensile strength of wood, table, 278 strengths of wires, table, 283 Three-wire balancers, 273 generators, 271 system, the Edison, 268 Torque of a motor, 98 Total characteristics of generators (see internal characteristics). Transformer, the constant-current, 341 Two-rate meter, the, 235 Underwriter’s rules, 219 Unipolar dynamo, the, 71 Units, table of, 34 Voltaic action and local action, 240 battery, the, 239 cell, the, 239 Voltage control of generators, 88 regulation of generators, 88 Volt, definition of the, 24 Voltmeter multiplying coils, 202 Voltmeters, 201 errors of, 479 Volts-per-commutator-segment of a dy- namo, 474 Ward Leonard method of speed control of motors, 108 Watt-hour meter, the, 204 Wattmeter, the, 202 Wattmeters, errors of, 480 Wave windings, 426 Weight of galvanized wire, 283 Weights and resistances of copper wire, 306 of wires, 283 Windings, armature, see armature. Wire, weights of, 283 weights and resistances of, 306 Wires for electric distribution, size of, 275 heating of, 284 information concerning (reference), 305 mechanical stresses in, 276 testile strengths of, 283 Wiring calculations for concentrated loads, 286 based on power loss, 296 distributed loads, 288 in constant-voltage systems, 286 for return-loop scheme, 294 charts, 287 outside and inside (reference), 305 Wood, tensile strength of, table, 278 Wrought iron, magnetic properties of, 365 M y ae 4 e ‘ he ~ “ ee Mon aie et == oa a - BAe,’ a aa oP bi AOI Tf MN tay ie ER iE Ny) fs rea } 4 s\ he ty RL f REY Sing tay Lat any, itindaerat PLEASE DO NOT REMOVE CARDS OR SLIPS FROM THIS POCKET UNIVERSITY OF TORONTO LIBRARY ** *e* PT Ps se oe ers , Sroreey ras ta — *. Pr 2 ot ah oo te tie +o" i ; : ise z retinas ’ Givers i ove Tas et 7 wae Ae rere piabitatstetey oe ent: aad ~a¢ sieve payee See tt ee “. et er 3 : ue ae ar fal . | rare : . o a he gee: ae te. ay ‘ ae alae : , ' nae , : : : 7? , | } ~ +e ‘ ta Sse : : ; Eon oe , ree er y : ”- . | : A Ax : . ; rer mons : ae we ee 8 AOE e relate ; Pe aes me * : ota ' ae eel Aube oe arses pea nes? os ee iteter as 8 * ‘ ; eet elle. , : sé ze | os Fosa:3 sar? (eae: 5 . | ee af : rptacetrtts nies een : 3 3 : ate) wr , 3 : | ecocete : | | | mat see 3 f. pa st 3 rs | . ‘ nee y oe rors ue ‘a 4 es 5 +. aT bot OT Ee Cue Fe. 