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Akny Water Tube Boiler Co. Builders of Operating for years without interrup- tion on many of the largest ships afloat, e aide Sectional Water Paracoil equipment is accepted as iE Oar Nia: ; standard throughout the marine world. mt Tube Boilers Paracoil equipment includes the fol- Ae ec He lowing: Feed Water Heaters, Oil Heaters, TD | acon l- aa for all types of Oil Coolers, Feed Water Filters and | med SI i Grease Extractors, Evaporators, Distil- } im vessels lers, Steam Traps, Exhaust Gas, Steam or mT Hot Water Generators—for Diesel Plants, | Hite i | ‘ and Rand System for Heating Bunker Oil. ] Poms I 4) / = Providence, R.1. Write for our interesting catalog. Ge S. A. DAVIS ENGINEERING CORP. 90 West St. New York City | __ 7 CATALOGUE FREE Factory: Elizabeth, N. J. P I] Wheels FOpeuer pisdes to fit any hub. Sheriffs Manufacturing Co. Established 1854 Milwaukee, Wis. Leathem D. Smith Dock Co. Sturgeon Bay, Wisconsin Self-Unloading Boats our Specialty Self Propelled and Self Unloading River Boats Wood and Steel Repair Work Propeller Wheels, Marine Engines, Brass and Iron Castings. Large variety of Grate Bars in stock. H. G. TROUT CO. (King Iron Works) 226 Ohio St. BUFFALO, N. Y. Phone: Seneca 5361 By James W. Owens Fundamentals of Welding —Gas, Arc and Thermit— A complete manual and encyclopedia covering every step and every phase of every branch of the art of welding—the only book that covers all kinds of welding—gas, arc, thermit and resistance. CONTENTS Classification and Nomenclature Production and Distribution of Oxygen Preparation and Finish Hydrogen and Acetylene he Gas Wel Arc Welding Generators and Transformers The Arc Weld Welding and Cutting Machines Technic of the Arc Weld Welding Rods, Electrodes and Fluxes The Thermit Weld Protectors and Safety Precautions Gas and Arc Cutting Organization, Shop and School Layouts Metallography of the Weld Training Residual Stress A Practical Gas Welding and Cutting Course Speed and Cost of Welding and Cutting A Practical Arc Welding Course Choice of Methods Standard Specifications Design Practical Applications Inspection and Tests Summary and Conclusions ° ° 1 \ $10.00 in United States and Canada Price, Postpaid ‘ioe in all other countries. THE PENTON PUBLISHING COMPANY Book Department Penton Bldg., Lakeside Ave. & W. 3rd St. Cleveland, O. 230 I.F.D. 94 MARINE REVIEW—July, 1929