The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

24 MARINE REVIEW. [April 19, RRELL & FOWLER - CLEV'D 0. BURRELL & FOWLES ~ CLEV'D ©. Lt SHELBY fee sditer roses OVERCOME most of the difficulties encountered in lap- welded tubing. They are made from the original round billet to the finished tubing with but one heating. The method of manufacture of cold drawn tubing makes it necessary to use only the very highest and best grade of material, The tubing cannot be made from material con- taining any flaws or physical imperfections as same would become apparent in either the piercing or cold drawing operation. Shelby Boiler Tubes are very dense, tough and exceedingly ductile and will withstand more manipulation and abuse before failure than any other tubing. Shelby Boiler Tubes are truer to size and gauge and more nearly concentric than is possible to manufacture lapwelded tubing. They are very smooth inside, lessening the liability to collect scale and making them more easy to clean. Shelby Boiler Tubes do not crack or fail at the ends, thus overcoming the difficulty of leakages around tubes ends, a merit which will be appreciated by all users of boilers. Write for Catalog "C" for further information. SHELBY STEEL TUBE COMPANY, General Sales Office, American Trust Building, Cleveland, O. Branch Offices:--Boston, New York, Chicago, 135 Lake St, Julian L. Yale & Co., Rookery Bldg., Chicago. J. J. Lynn, Port Huron, Mich, TUBING Ue ts Bast rs 1 re St art a