. Electric railway journal . r wheels 46,700 39,214 Average energy required to operate cars per ton-mile, watts Derailments 5« °° Car failures 10 7 The low wheel mileage in 1914 was due to severalbroken axles, which prevented the wheels on such axlesfrom being used up to the limit of their useful life. In the item of car failures we have listed only thecar failures that were serious enough to delay the sched-ule ten minutes or more. In the item of average energy required to operatecars per ton-mile we have metered, at the d. c. busbarsat the power house, the entire kilowatt hours r
. Electric railway journal . r wheels 46,700 39,214 Average energy required to operate cars per ton-mile, watts Derailments 5« °° Car failures 10 7 The low wheel mileage in 1914 was due to severalbroken axles, which prevented the wheels on such axlesfrom being used up to the limit of their useful life. In the item of car failures we have listed only thecar failures that were serious enough to delay the sched-ule ten minutes or more. In the item of average energy required to operatecars per ton-mile we have metered, at the d. c. busbarsat the power house, the entire kilowatt hours requiredto operate the motors, heaters, interior lighting, archeadlights, and we have also included the line losses. A Home-Made Junction Box BY J. G. KOPPEL, ELECTRICAL SUPERINTENDENT OF BRIDGES,SAULT STE. MARIE, MICH. The accompanying illustration shows a home-madejunction box, installed between paper-insulated, lead-covered and extra flexible rubber-insulated loomedcables. A short time ago a steam drive for a drawbridge. Flexible Loou Copper Terminals Elcctnc JUNCTION BOX INSTALLED ON CENTER PIER OF DRAW-BRIDGE TO CONNECT STRAIGHT RUN AND FLEXIBLECABLES was replaced by an electric motor. The cables forthe motor energy supply were installed undergroundin clay ducts and the ends were run up the center pierof the bridge. From the base of this center pier acoil of extra flexible, rubber-insulated and loomed cablewas run, so arranged that when the draw swings outthe coil will unwind, and when the draw swings in thecoil will rewind. The problem, however, was to find asuitable junction box which would permit the lead-covered cables to stay in place permanently while theflexible cables could be disconnected after due wearwithout breaking a costly wiped joint. 384 ELECTRIC RAILWAY JOURNAL [Vol. XLV, No. 8 Several catalogs were examined for a suitable pot-head but without success, because the clearance be-tween the steel and the masonry was too small topermit the use of a
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