. Electric railway journal . per car-mile has been reduced from This reduction is due to a general TABLE I—GENERAL STATISTICS ON POWER CONSUMPTIONTREND ON NORTH SHORE ROAD Used on per Car-Mile --Car-Miles Operated— Passengers Interurban on Interurban Year Passenger Freight Carried System System 1915 2,450,988 272,088 6,762,518 15,160,975 1916 2,830,317 ,689 17,892,122 1917 4,034,352 413,762 10,374,243 23,207,845 1918 5,355,632 11,875,249 28,481,021 1919 6,128,254 457,264 12,425,634 ,649 4 67 1920 7,074,
. Electric railway journal . per car-mile has been reduced from This reduction is due to a general TABLE I—GENERAL STATISTICS ON POWER CONSUMPTIONTREND ON NORTH SHORE ROAD Used on per Car-Mile --Car-Miles Operated— Passengers Interurban on Interurban Year Passenger Freight Carried System System 1915 2,450,988 272,088 6,762,518 15,160,975 1916 2,830,317 ,689 17,892,122 1917 4,034,352 413,762 10,374,243 23,207,845 1918 5,355,632 11,875,249 28,481,021 1919 6,128,254 457,264 12,425,634 ,649 4 67 1920 7,074,419 887,399 13,388,238 29,314,722 improvement in operating efficiency, one of the factorsof which is the substation interspacing but the exactamount for which this is responsible cannot bedetermined. The other figures in Table I will give agood idea of the rapid growth of the business of thecompany, and the graphic schedules repioduced herewithwill show at a glance the service given for which powermust be ♦Abstract of paper presented before Illinois Electric RailwaysAssociation in Chicago, Marcli 16, 1921. LAKE BLUFF AUTOMATIC RAILWAY SUBSTATION,NORTH SHORE ROAD Before this method of power development was enteredinto, consideration was given to raising the line voltageon part of the system to 1,200 volts, but this plan wasabandoned on account of the excessive cost of changingcar control equipment and old motor equipment. Con-sideration was also given to the installation of addi-tional feeder copper, but this was also abandoned onaccount of the heavy cost. In an article published inthe Electric Railway Journal of Jan. 11, 1919, Ishowed that it would cost approximately $650,000 toaccomplish the same voltage betterment that has beenmade with interspaced substations, and fundamentallythis would have been the wrong method of correctionto apply. The existing feeder capacity is shown in anaccompanying diagram, no change having been madesince before 1916. Power is
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