INDEX 



291 



w 



i or motor, 284 



Walker, Miles, compounded alternator, 98 

 Walker, W. G., air-friction brake. 205 

 Wattless component of current, !! 

 Wiittm, -i.-rs, 70; theory of, 44 

 Wave-form, 2, 8 ; wave-length of magnetic 



tin \.IiS; wave of alternating current, 1 ; 



waves of magnetic flux, alternating and 



rotating, 39 

 Weekes, efficicncv test of induction motor, 



212 



Westinghouge high-voltage voltmeter, 68 

 Wilson, commutator motor, 259 

 Windings, armature, 88 ; rotor, 117; volt* 



age of, liio 

 Worrull, use of condensers in connection 



with voltmeters, 67 

 Wiist and Co., multiple motor method of 



speed control. 227 



Y- coupling of three-phase circuits, 31 



THE END 



Bt WILLIAM CLOWES AND SONS, UNITED, LONDON ASD BBCCLES. 



