INDEX 



295 





Swinburne's "hedgehog" transformers. 



xix 



Synchronism, 107 

 Synchronous and induction motors, 



comparison between, 90 

 operation, stability of, u 

 motors with alternating fields, 145 

 Symmetrical polyphase motors, case 

 of, 19 



Three-part pole, 232 

 Transverse reaction, method of deter- 

 mining, 279 

 Two-part pole, 234 



Unequal electromotive forces, case of, 7 



Tap voltage, 231 



Table, empirical coefficients, 255, 258, 



259 

 motors of the Societe 1'Eclairage 



Electrique, 5 

 numerical example, 78 

 saving in cost of equipment, 76 



in operating cost, 77 

 single-phase and three-phase syn- 

 chronous motors of American 

 manufacture, 285, 286 

 theoretical coefficients, 263 

 Tesla starting method, 113 

 Testing alternators, 270 

 Theoretical coefficients, 263 

 comparison with, 261 

 form of V-curves, 59 

 Theory, analytical, of synchronous 



motors, 15 

 Thompson, Prof. S. P., 64 



Value of current-supply voltage, 183 



of reactance, 183 

 Variation of voltage by the split pole, 



225 

 Variations of stability with operating 



conditions, 52 

 V-curves, 56 



for constant potential, 200 

 predetermination of, 57 

 theoretical form of, 59 

 Voltage regulation by varying the 

 reactance X in the current, 

 211 



of at terminals, 189, 190 

 variation by the split pole, 225 



W 



"Watted" current, 34 

 Wave-form of E. M. F., influence of, 

 102 



