. Electric railway journal . SIMPLEXRoller Bearing Trolley Base ist economical. Tension INCREASES as pole!?oes UP. decreases as pole comes more bent poles or knocked down particulars from THE TROLLEY SUPPLY , Ohio Ventilation—Sanitation—Economy—Safety All Combined in THE COOPER FORCED VENTILATION HOT AIR HEATER Patented September 30, 1913. Auk for the full story. We Also Manufacture Pressed Steel Hot Water Heaters THE COOPER HEATER CO., CARLISLE, PA. UNION SPRING & MANUFACTURING CO. SPRINGS COIL AND ELLIPTICM. C. B. Pressed Steel Journal Box Lids General Office, Oli
. Electric railway journal . SIMPLEXRoller Bearing Trolley Base ist economical. Tension INCREASES as pole!?oes UP. decreases as pole comes more bent poles or knocked down particulars from THE TROLLEY SUPPLY , Ohio Ventilation—Sanitation—Economy—Safety All Combined in THE COOPER FORCED VENTILATION HOT AIR HEATER Patented September 30, 1913. Auk for the full story. We Also Manufacture Pressed Steel Hot Water Heaters THE COOPER HEATER CO., CARLISLE, PA. UNION SPRING & MANUFACTURING CO. SPRINGS COIL AND ELLIPTICM. C. B. Pressed Steel Journal Box Lids General Office, Oliver Bldg., PITTSBURGH, : New Kensington, Pa. 149 Broadway, New York. 1204 Fisher Bldg., Chicago, 111. Missouri Trust Bldg., St. Louis, Mo. March 20, 1915] ELECTRIC RAILWAY JOURNAL 145 No Lubrication. Universal Trolley Wheel It lubricates itself. Large grease cups inthe hub provide lubricant as long as thewheel lasts, and some of our users tell usthat its life is twice as long as many. Built with a special harp, contact spring,bushing and pin, that all make a saving intime and cost. THE PRICE WILL INTEREST YOU. The Universal Trolley Wheel Co. Northampton, Mass. AUTOMATIC VENTILATOR CO., Sales Agent 2 Rector Street, New York City 9484 IF you are using any other typeof conduit than Duraduct foryour lighting and heating systems,you are wasting money. DURADUCT Reg. U. S. Pat. Oft. Flexible Non-Metallic Conduitwill give 100% in efficiency—saves 66 2/3% in cost—and 85% inweight. It is also easier andcheaper to install. Tubular Woven Fabric Co., Mfrs., Pawtucket, A. HALL BERRY, General Sales Agent 97 Warren St., New York 309 So. Desplaines St., Chicago Eliminates the Man Factorand Changes Uncer-tainty to Certainty
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