INDEX. 



211 



Power given to alternating-current cir- 

 cuits, 28 



, measurement of, 29 



, true, 28 



Products of vectors, 37 



Q 



Quantity, electrostatic unit of, 8 



Reactance, 19, 24, 45 



Regulation of transformers, 78 



Resonance, 24 



Roessler, Dr., 63 



Root mean square values of current and 

 E.M.F., 27 



; of curves contain- 

 ing higher harmonics, 52 



Rotary converters, 118 



, heating of armatures of, 122 



magnetic fields, 97 



Rotor, 98, 112 



Russell, A., 135 



Scalar product of two vectors, 37 



quantities, 32 



Scott, C. F., 117 



Self-induction, 6 



Series circuits, 46 



Shape of P.D. curve on iron losses, effect 

 of, G3 



Sine curves in alternating-current pro- 

 blems, the use of, 50 



, equivalent, 53 



Skin effect, 71 



Slip, 107 



Solenoid, 4 



Specific inductive capacity, 8 



Split dynamometer, 134 



Stability of plant consisting of syn- 

 chronous motor and generator, 92 



Starting devices for induction motors, 

 110 



torque of induction motors, 108, 111 



Stator, 98, 112 



windings, 99 



Steinmetz,C. P., 63, 119, 122, Appendix E. 



Strength of magnetic Held, 2 



of magnetic field inside a solenoid, 4 



Structure of induction motors, 112 



Susceptance, 108 



Synchronizers, 82 



Synchronous motors, 81 



measuring 



of copper 



Taylor, C. P., 63 



Temperature tests of transformers, 64 



Testing efficiencies of transformers, 



methods of, 72 



Tests of Ferranti transformers, 64 

 The effect of the operator "k" on a 



vector, 38 



Theory of the induction motor, 107 

 Thompson, Professor S. P., 117 

 Three-ammeter method of measuring 



power, 133 

 Three voltmeter method of 



power, 132 

 Total flux, 3 

 Transformers, calculations 



circuits of, 67 



, calculation of iron circuits of, 68 



, design of, 65 



, effect of magnetic leakage in, 70 



, insulation tests of, 79 



, monophase, 59 



, phase, 117 



, polyphase, 116 



, regulation of, 78 



Transmission lines, cost of, 123 



of energy, 123 



Tri-phase circuits, measurement of power 

 in, 135 



currents, 96 



motors, 104 



windings of stators, 102 



U 



Uniform magnetic field, 3 

 Unit current, 4 



magnetic pole, 2 



of capacity, 10 



Use of sine curves in alternating-current 

 problems, 50 



Vector addition, 36 



algebra, 32 



, the application of, 40 



, algebraic expressions for a, 35 



products, 37 



, the effect of the operator " k " 01 



a, 38 



Vectors, scalar product of two, 37 

 , vector product of two, 37 



W 



Wattless currents, 59 

 Wattmeter, 29, 130 



, correction factor of, 131 



Windings of stators, 99 



Witting Bros., 113 



Work done in charging a condenser, 11 



