Abstract :
Laboratory tests indicate that solid graphitic material for trolley wire lubrication is vastly superior to the graphite-grease now commonly used for that purpose. Tests under practical operating conditions now are being made on a 210-mile electrified portion of the Chicago, Milwaukee, St. Paul, and Pacific Railroad. This paper discusses briefly the general problem of trolley wire lubrication, and presents results of tests on both graphite-grease and solid lubricant.
