CONTENTS. 
CHAPTER 1IV. 
SPECIAL, METHODS OF DISTRIBUTION. 
Boosters, their proper and improper use—Three wire 
system—Methods of balancing—Self contained three wire 
system—Advantage of high voltage—Motors in series—In- 
crease of working voltage—Arrangement of feeders—Com- 
posite systems. . 
CHAPTER V. 
SUBSTATIONS. 
Auxiliary stations—Distributed stations—Substations 
with power transmission—Cost of power in stations of vari- 
ous sizes—Single station zs. distributed stations—A typical 
auxiliary station—Conditions of economy—Typical dis- 
tributed stations—Typical transmission station—Compari- 
son of substation methods—Relative costs . 
CHAPTER VI. 
TRANSMISSION OF POWER FOR SUBSTATIONS. 
Generation of alternating current—Modern alternators 
—Necessity of high voltage—Inner pole machines—Trans- 
formers — Transmission lines — Insulators — Synchronous 
motors—Polyphase generators—Substations with synchro- 
nous motors—Motor generators—Rotary converters—I,ag- 
ging and leading current—Computation of an alternating 
line—of a three phase line—Operation of the machines. . 
CHAPTER VII. 
ALTERNATING MOTORS FOR RAILWAY WORK. 
Varieties of alternating motors—Synchronous motors 
with commutating start—with inductive start—Properties 
of synchronous motors—Polyphase induction motors—their 
structure and properties—Regulation of speed—Torque— 
Tests of polyphase induction motors for railway service— 
their weak points—The first polyphase railway—Induction 
motors on monophase circuits—Methods of working poly- 
phase motors from monophase circuits—Monophase induc- 
tion motors and their properties——Application of alternating 
transmission to railway work—Its economic relation to 
other methods of working . 
84-103 
104-129 
130-164