282 



PAGE 



Torque in slotted armatures, how produced 258 



of rotary magnets 253 



of revolving machinery 258 260 



Tractive effort, actual 251 



average, in a D.C. magnet 252 



in an A.C. magnet, average 254 



magnet, force of 248 



Transformer action 56 



Transformers, core loss current in a 82 



exciting current in a 80, 83 



induced e.m.f . in a 62 



inductance of 211-214 



as affected by end coils 213 



as affected by number of coils 213 



as affected by the shape of the coils 212 



values of the constants 215 



joints in the magnetic circuit of a 81 



leakage flux in a 208 



magnetizing current in a 80 



repulsion between the coils of a 245 



types of 60 



Transmission line, description of the field of a 193 



shape of the field calculated 196 



single phase, inductance of 199 



three- wire, symmetrical spacing, inductance of 201 



unsymmetrical spacing, e.m.f. induced in 205 



unsymmetrical spacing, equivalent reactance of 206 



unsymmetrical spacing, equivalent resistance of 207 



Transverse and direct reaction, nature of 150 



reaction, calculation of the coefficient of 160 



definition of the coefficient of 153 



in a D.C. machine 165 



in a synchronous machine 150 



Turning moment in machinery 258-260 



Unit of flux 6 



of inductance 184 



of permeance 9 



of reluctance 8 



Units, table of the dimensions of 263 



V curve or phase characteristics 142 



Variable-speed D.C. motor under load 171 



Vector relations in a synchronous machine 145, 147, 154, 155 



with non-salient poles 145 



with salient poles 154 



Virgin state of iron 32 



