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October, 1920 THE MARINE REVIEW 59 How many spoiled rivets go into your scrap heap? with fuel- burning heaters Less than 4 of |I% Spoilage with Berwick Electric Heater ‘ A leading trade paper, after investigating throughout the country, places loss of rivets in average plants at approximately 15 per cent. Most of the loss is due to burning and scal- ing (or oxidation) in fuel-burning heaters. The Berwick Electric Heater reduces this loss to less than 14 of | per cent. Every rivet is in plain view while being heated, and inspection is not hampered by flames, smoke, or intense heat. Only gross carelessness can permit any loss whatever from overheating. The average loss with fuel-burning heaters, figuring rivets at $4 delivered, is at least 40 cents per hundred pounds. Practical elimination of this waste is only one of the savings effected by— 28 wey ELECTRIC —— a cs Ps oy Ke fj sf Rmenn 3 Fits No. 3 Five-Electrode Berwick Heater. Also built with two or three electrodes. . For rivets from %" to 1" diameters, up to 44"long orlonger. Capacity over 450 hot rivets per hour. Note these features: —Low operating cost. Less than 20 kilowatt- hours per hundred pounds of rivets heated. —No smoke, gas, dirt, or excessive heat. —Fire risk eliminated. —Hot rivets in 20 to 30 seconds after starting. —Time-saving portability. Heater can be placed close to work. Often eliminates sticker-boy. —Power used only when hot rivets are needed. —Uniform heating. Radiation from center of rivet outward. —Safe. Simple to operate. No complicated wearing parts. Negligible maintenance cost. Send for catalogue. Mention sizes of rivets used, capacity required, and alternating current conditions. American Car and Foundry Company 165 Broadway, NEW YORK Please mention THE MaRINE REvIEW when writing to Advertisers