. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Rue Boiler Washerand Tester SEND FOR CATALOGUE Rue Manufacturing Co. 228 Cherry Street Philadelphia, Pa. Manufacturers of Injectors, BJectorB, Roller Waabers and Teatera, Boiler Ohecks, Theck ValTn. DUNERCAR CLOSETS DUNER CO. Rll!J!J! A Practical Journal of Motive Power, Rolling Stock and Appliances Vol. xxxv 114 Liberty Street, New York, October, 192^ No. 10 The Effect of Polarized Mercurv on Boiler Tubes -- ... j By Geo. L. Fowler The boiler compound known as polar- The film,
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Rue Boiler Washerand Tester SEND FOR CATALOGUE Rue Manufacturing Co. 228 Cherry Street Philadelphia, Pa. Manufacturers of Injectors, BJectorB, Roller Waabers and Teatera, Boiler Ohecks, Theck ValTn. DUNERCAR CLOSETS DUNER CO. Rll!J!J! A Practical Journal of Motive Power, Rolling Stock and Appliances Vol. xxxv 114 Liberty Street, New York, October, 192^ No. 10 The Effect of Polarized Mercurv on Boiler Tubes -- ... j By Geo. L. Fowler The boiler compound known as polar- The film, as it was found on the tube, never be peeled off but could only be ized mercun,- and manufactured by the was a smooth, glossy black much smoother separated from the metal by using an Bird-Archer Co. of New York, pos- than the original surface of the tube exceedingly hard and sharp scraper; the sesses the peculiarity of coating the tubes, when new, and having a slightly lustrous removed material coming off in the shape. 1— DESCALED. 2—SCALE REMOVED BV SCRAP-TfBF I^^- TUBE COATED WITH BLACK OX-IDE OF TUBE 3—WITH SCALE 4—SCALE REMOVED LXTREATED TUBE NO. 3
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