. Electric railway journal . painting or revarnishing:m 1909. The operation of the relay Is such that when a Cost, of scrubbing the outside of an interurhan car pre-greater amount of current than the relay is set for is fedparatory to , or repainting, including doors andto tb* motor*. Iho r*>lay will open the mnettpr control olroniHtinldn !• I 760 ELECTRIC RAILWAY JOURNAL. Not UsingCompound. UsingCompound Days required to scrub 3 Days. 2 Days. Scrubberslabor 120 hours $ 80 hours ©$ Compound: 3 gallons©$ $ Economy per car in favor o
. Electric railway journal . painting or revarnishing:m 1909. The operation of the relay Is such that when a Cost, of scrubbing the outside of an interurhan car pre-greater amount of current than the relay is set for is fedparatory to , or repainting, including doors andto tb* motor*. Iho r*>lay will open the mnettpr control olroniHtinldn !• I 760 ELECTRIC RAILWAY JOURNAL. Not UsingCompound. UsingCompound Days required to scrub 3 Days. 2 Days. Scrubberslabor 120 hours $ 80 hours ©$ Compound: 3 gallons©$ $ Economy per car in favor of Car Cleaner. Cash : $ Time 1 rlav ihe value of one days time of a car out of service is per-haps anywhere from $2 to $20, depending upon costand capacity of car and such local conditions as density oftraffic and whether the railroad company possesses a short-age or surplus of available cars. Magnet Wire Magnet wire, which has the distinction of representingone-fifth of all the purchases for material used in mainte-. Rolling Stock Equipment—Current Limit Relay Installed inController Top nance of cars, continues to be one of the weakest items ofmaterial used. While conspicuous improvements have beenmade in many other directions, magnet wire, from the verynature of its delicate make-up, still calls for the closest in-spection and the greatest of care in handling. Many casesof troubles and breakdowns yet owe their beginning to theweakness of insulation on wire. The report of last yearscommittee on maintenance and inspection showed very con-clusively that the system of impregnating coils has grownin favor during the past two or three years and that econ-omy has followed this method. It has also been demon-strated that immersing armatures that have exposed wind-ings such as W. P. 50s., Westinghouse 12s and 68s, etc.,and those of air compressor motors has proven decidedlybeneficial. Trolley wheel economy has been obtained by using wheels6 in. in diameter, and, after gettin
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