INDEX 



715 



POTENTIAL DIFFERENCE AND ELEC- 

 TROMOTIVE FORCE MEASURE- 

 MENT 



potentiometer arrangements, 

 potentiometer, 271 



alternating current, 289 

 deflectional, 277 

 Leeds and Northrup po- 

 tentiometer, 274 

 thermo kraft frei, 284 

 Wolff potentiometer, 276 

 voltmeters, for direct current, 



236 



for alternating current, 239 

 electrostatic, 253 



Potentiometer method for measur- 

 ing resistance, 157 

 Pot icr, method for measuring power, 



320 



Power factor charts, 539 

 I'MUI K FACTOR INDICATORS, PHASE 

 METERS, SYNCHROSCOPES 

 AND FREQUENCY METERS 

 Chapter X, 530 

 single-phase power-factor in- 

 dicators, 535 



polyphase power factor indi- 

 cators, 536 



PI\VKH Mi: \.-TKKMENT 

 Chapter VI, 303 

 cyclograph, 326 

 instrument transformers used 

 in power measurement, 



M6 



polyphase circuits, measure- 

 ment of power of, 328 

 Potier method for power 



measurement, 320 

 power diagram indicator, 



Ryan, 326 



split dynamometer method 



for power measurement, 319 



three dynamometer method, 



317 



voltmeter method, 318 

 wattmeter, electrodynamo- 

 mctcr, 304 



POWER MEASUREMENT 



electrostatic, 320 



polyphase,- 333 



Punga power factor meter, 539 

 Pyrometer, resistance, 224 



Q 



Quadrant electrometer, 248 

 Quartz fibers, 11 



R 



Rate of watt-hour meters, defined, 



493 

 Rayleigh 



Clark cell, 296 

 current balance, 89 

 Reeves method for adjustment of 



Thomson bridge, 199 

 Resistance coil, construction of, 128 

 for alternating current work, 



133 



RESISTANCE DEVICES 

 Chapter III, 128 

 resistance boxes, 142 



dial and decade arrange- 

 ments, 143 



multiple decade arrange- 

 ments, 144 



Northrup decade arrange- 

 ments, 145 

 resistance coil, constructor 



of, 128 

 for alternating current 



work, 133 

 rheostats, 145 



RESISTANCE MEASUREMENT 

 Chapter IV, 155 

 closed circuit, resistance of e 



part of, 95 

 commercial circuit with 



power on, 



Northrup method, 216 

 voltmeter method, 214 

 deflection method, 156 

 differential galvanometer, 157 

 Kohlrausch method, 159 



