. Electric railway journal . rom the manifests for the dates corresponding to thedays on which energy measurements were made thenumber of passengers carried and the cash value ofreceipts were calculated for each trip and each number of platform-hours with the correspondingcash value was also computed for each trip and day. The cost of power consumption in the followinganalysis was based on a unit price of $.00666 per kilo-watt-hour.* From costs of maintenance of equipmentof motor cars and trailers, taken from company records,a ratio of maintenance of trailers to motor cars of 25per cen
. Electric railway journal . rom the manifests for the dates corresponding to thedays on which energy measurements were made thenumber of passengers carried and the cash value ofreceipts were calculated for each trip and each number of platform-hours with the correspondingcash value was also computed for each trip and day. The cost of power consumption in the followinganalysis was based on a unit price of $.00666 per kilo-watt-hour.* From costs of maintenance of equipmentof motor cars and trailers, taken from company records,a ratio of maintenance of trailers to motor cars of 25per cent was used. The cost of maintenance of equip-ment of motor cars was figured at $ per car-mile. From the power measurements and the calculationsbased on the figures given, the analysis of power con- *The present cost is more nearly $.(i(is ji^r kilowatt-hour. Troii| Car Connacfing Blocks, on Roo-P 25Con+rol Mo+or Car Note.:,S2 Wire, is sfiorfzd \A/hen this Switch isclosad for tzifhzr Moforor Trailer Plow Plow Laads. WIRING DIAGRAM OP TRAILER CAR SHOWING .JUMPERCONNECTION TO MOTOR CAR, AS ARRANGEDFOR TWO-END TRAIN OPERATION /?e si stance 170 Electric Railway Journal Vol. 57, No. 4 sumption and costs was obtained as shown in theaccompanying table. Reduced to a percentage basis, it is thus found thatthe cost of operating the trailer is 42 per cent of thecost of operating the motor, and of the total cost of thetrain operation 30 per cent only is chargeable to the Kilowatt-liour per cai-mile: Morning trijj motor 4 .65 trailer 0 .95 train Afternoon trips motor trailer I . 15 train Platform expense per car-mile operated: Morning trip. motor $0,184 trailer $0 092 train Afternoon trip motor .20 trailer .10 train Maintenance of equipment expense per mile operated: Morning trip motor $0 0475 trailer $0 012 train Afternoon trip motor .0475 trailer .012 train Oo^.t of the trips as operated, divided into: Power—Morning motor $ trailer $ train Afternoon motor . 29 tra
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