718 



INDEX 



U 



Units, legal electrical in U. 8., 705 

 Universal shunt, Ary ton and Mather, 

 52, 202 



V 



Varley loop test, 679 

 Vibration galvanometer, 434 

 current, sensitivity of, 436 

 voltage, sensitivity of, 438 

 Voltmeter 



alternating-current, 239. -Ml 

 direct -current, 236 



effect of temperature 01 

 electrodynamometer voltmet ct . 



239 



hot wire voltmeter, 241 

 Hartmann and Braun, 1MJ 

 roller, 242 

 induction, 449 

 electrostatic, 253 



condenser multiplier for, 256 

 high range, 258 

 use of false zero, 256 

 Volt-ammeter method for resistance 



measurement, 155 

 Vreeland oscillator, 420 



W 



Wagner earth connection, 397 

 Walker, Miles, connections for elec- 

 trostatic wattmeter, 321 

 Water rheostats, 145 

 Wattmeter 



electrodynamometer, 304 



designation of terminals of, 



329 

 heating losses in, 306 



compensation for heating 



in potential circuit, 307 

 local field effects, 308 

 mutual inductance between 

 current and potential cir- 

 cuits, effect of, 315 

 reactance in potential circuit, 

 effect of, 309 



Wattmeter , electrodynamometer, 

 reactance in potent ml 

 circuit, compensation for, 

 313 



correction for, 3 1 1 

 voltage between fixed and 



movable coils, 309 

 electrostatic wattmeter, 320 

 induction wattmeter, 452 

 lagging device for, 453 

 polyphase wattmeter, 333 

 interference of elements of, 



333 

 Wattmeter method for measuring 



large alternating currents, 86 

 Watt-hour meter 



accuracy, relative, of induction 

 and com mutating types under 

 service conditions, 468 

 com unit at ing meters for direct 



current, 457 



on alternating current cir- 

 cuit, 471 



essential characteristics of watt- 

 hour meters, 461 

 induction watt-hour meter, 

 473 



lagging device for, 475 

 polyphase, 482 



mercury watt-hour meter, 488 

 meter testing, 490 

 three wire meter for direct cur- 

 rent, 469 

 Wave analysis, 650 



Fischer-Hinnen method, 661 

 harmonic analyzers, 666 

 Chubb analyzer, 666 

 Laws method of experimental 



analysis, 669 

 Runge method of grouping 



terms, 652 

 example of 12 point schedule, 



656 



WAVE FORM, DETERMINATION OF 

 Chapter XIV, 612 

 Braun tube, 644 

 contact method, 613 



