INDEX 457 



PACE 



Efficiency, all-day, of a transformer 297 



calculation of 42 



importance of, in dynamo electric machinery 187 



obtaining data for calculation of p.Ci 



of a motor, determined from name plate data 195 



Electric current, general effects of 1 



energy 11 



power 11 



Electrolysis 2 



Electromotive force, generated in a conductor cutting flux 3 



generated in primary cell 2 



generated in a thermo-couple 4 



nature of 4 



of a c-c. generator, calculation of 99 



unit of, definition 9 



Electromotive force wave, form of, in an elementary generator ... 94 



Equalizer bus-bar, function of 148 



Excitation, field, methods of, in c-c. machines 103 



of a-c. machines 232 



Exciter, use of with a-c. machines 232 



External characteristic of a c-c. generator 25 



of an a-c. generator 253 



Fan, use of, for forced ventilation 49 



Farad, unit of capacity 220 



Faults occurring in electrical machinery 436 



Field coils, construction of 72 



current density in 71 



for turbo-alternators 33 



Field compounding curve 255 



Field frame, bipolar and multipolar 28 



material for different parts 



rotating and stationary 29 



Field rheostat 105 



Field windings, calculations of 64 



proper sized wire for 69 



Flux leakage 



Flywheel, use of, with compound motor 1 



Force between current and magnetic field 



Force, synchronizing, of an alternator 272 



Form factor of an alternating current wave 2 



Frequency, critical, for an a-c. circuit 227 



