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1900.] MARINE REVIEW. 29 Shelby Cold Drawn Seamless Steel Boiler Tubes are made from the best quality of open hearth steel, They are worked cold after the hot rolling operations. This method of manufacture produces a boiler tube that is very hard and smooth, with the greatest toughness, density and ductility. me Shelby Boiler Tubes do not crack or fail at the ends, they do (mq 7 not leak. Cold Drawn Boiler Tubes are specified for all boilers in the U.S. and British Navies. They have the greatest STRENGTH of any Boiler Tubes made. Write for Catalogue. Tf SHELBY STEEL TUBE CO, cevesano.0. GENERAL SALES OFFICE, AMERIGAN TRUST BLDG. BRANCH NEW VORK |. JULIAN L. YALE &CO. OLD ROOKERY BLDG, CHICAGO. OFFICES CHICAGO = y J LYNN 135 LAKE ST. @ PORT HURON, MICH. BURRELL & FOWLER ~ CLEV'D 0.