. Electric railway journal . riding cars. Thorough tests have shown thatthe co-efficient of friction of the Davis Wheel and the steel rail isfrom 9 to 48% higher than that ofother wheels. Therefore, with highstarting accelerations, there is lessslippage with the Davis Wheelthan with any other type of wheelin electric railway service. Davis Steel Wheels save ap-proximately 20% in weight overother wheels for average serviceon electric lines, and at the sametime provide greater saving in weight meansconservation of energy at thepower house. Records of lines using DavisSteel Wheels s
. Electric railway journal . riding cars. Thorough tests have shown thatthe co-efficient of friction of the Davis Wheel and the steel rail isfrom 9 to 48% higher than that ofother wheels. Therefore, with highstarting accelerations, there is lessslippage with the Davis Wheelthan with any other type of wheelin electric railway service. Davis Steel Wheels save ap-proximately 20% in weight overother wheels for average serviceon electric lines, and at the sametime provide greater saving in weight meansconservation of energy at thepower house. Records of lines using DavisSteel Wheels show that the costof maintenance is lower thanthat of any other type of Wheels will decrease yourwheel costs. They are furnished for all classesof electric line service. Send usblue-prints of your present estimate and design to meetyour requirements will be cheer-fully furnished. Space 409 on the Pier American Steel Foundries 1100 McCormick Building CHICAGO 216 ELECTRIC RAILWAY JOURNAL [September 30, 1916. ANDEASYRIDING COIL and ELLIPTIC M. C. B. Pressed SteelJournal Box Lids Kensington Pressed SteelJournal Boxes Steel CastingsUnion Spring & Mfg. Co. General Office, Pittsburgh, : New Kensington. Church St., New York. Fisher Bid „ Chicago, Bldg., Louisville, Bldg., Richmond, Bldg., Washington, D. C. TjT GURNEYIZE YOUR ROAD
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