. Electric railway journal . Look at the above diagrams. The econ-omy of a Cooper Heater must be appar-ent from them for from coal to heat is adirect process—with a Cooper Heater—one economical step. With an electric heater the coal mustpass through many steps before it is avail-able as heat in the car. Every successivestage in the operation enters an economicloss. If you realized what this loss meansto you in cold cash you would investigatethe Cooper Heater without delay. Someactual cost comparison figures are yoursfor the asking. The Cooper Heater Co. Carlisle, September 30, 1916] ELECT
. Electric railway journal . Look at the above diagrams. The econ-omy of a Cooper Heater must be appar-ent from them for from coal to heat is adirect process—with a Cooper Heater—one economical step. With an electric heater the coal mustpass through many steps before it is avail-able as heat in the car. Every successivestage in the operation enters an economicloss. If you realized what this loss meansto you in cold cash you would investigatethe Cooper Heater without delay. Someactual cost comparison figures are yoursfor the asking. The Cooper Heater Co. Carlisle, September 30, 1916] ELECTRIC RAILWAY JOURNAL 161 ELECTRICHEATERS GOLD> THERMOSTATIC CONTROL VENTILATORS ORIGINATORSof theVentilatedPorcelain CoreIts general use hasproven its value
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