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, 7 1 

 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 



H 



