CONTENTS. 
CHAPTER VIIIL 
INTERURBAN AND CROSS COUNTRY WORK. 
Conditions on interurban roads—Power required—Com- 
putation of the feeding system—Fconomy of various 
methods of distribution—Light electric roads for country 
districts—Narrow gauge roads—cost of construction and op- 
eration—Bicycle and saddle-back roads—cost of construction 
and operation . 
CHAPTER IX. 
FAST AND HEAVY RAILWAY SERVICE. 
Kinds of work for which electric power is best suited— 
Suburban passenger traffic—Conditions of competition be- 
tween steam and electricity—Power required for operating 
electrically—Special trolley systems—Computation of the 
feeders—Cost of overhead system—The third rail system— 
The Nantasket road—Cost of electric power for suburban 
work—Very high speeds—Air resistance—Other resistances 
—Tractive power required—Track for extreme speeds— 
Methods of operation—The braking problem—Computation 
of the feeding system—Cost of power—Electric elevated 
roads—The Metropolitan road of Chicago—The Lake Street 
road of Chicago. Distribution of the power—Special heavy 
service—The Baltimore & Ohio tunnel—Results already at- 
tained—Electric passenger locomotive—Methods of power 
distribution.. . 
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