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1900.] MARINE REVIEW. 29 aces: ' | NH] Shelby Cold Drawn Seamless Steel Boiler Tutes are made from the very best quality of open hearth steel and are worked cold after the heating operations. This method of manufacture pro- duces a tube ABSOLUTELY FLAWLESS. Shelby Boiler Tubes contain no laps, seams, or blow holes and are very dense, tough and ductile. No dirt rolled into surface as will \ frequently be found in lapwelded tubes. Shelby Boiler Tubes do not crack nor fail at the ends, Shelby Tubes do not leak. | Cold Drawn Seamless Steel Tubing is specified by the U. S. Government for all U. S. Navy Boilers. Write for new catalogue for full information. eh ee, eoase | "SHELBY STEEL TUBE COv Cuevetan2.c. GENERAL SALES OFFICE~ ~ AMERICAN TRUST BLDG. BRANCH YALE & CO. a rics: NEW eo. e HULA iA . 35 LAKE ST.' Pee as J. LYNN OS 6 A AS sae a oe 6 . - seo. * oe C4 (hee ' ees Sp ce 85 8 % . : . e Oi 8 Nm OP 8 eT gc * Sat 8g Oe ERs S aietted PORT HURON, MICH. ah