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OIL OUT 7 Coen Cleanable Heaters The Oil Heater is an important unit in any oil burning system, and the type, construction and material should be given careful consideration by the purchaser. Features of Coen latest. improved cleanable oil heaters are SPIRAL OIL FILM 2. Steel Shells 4. No stuffing boxes 6. No necessity for repairs 1. Everlasting , 3. No inside joints 5. No Coils or Tubes 7. Heating Surface can be easily exposed for cleaning. Ask for prices : on. 4 COEN COMPANY, SAN FRANCISCO 112 Market St. CONDENSATE «— STEAM IN Inc. LOS ANGELES NEW YORK 428 Story Bldg. 50 Church St. THE MULHOLLAND HATCH-FASTENER COMPANY Cleveland, Ohio Oldman-Magee Boiler Works, inc. Boilers, Tanks, Stacks, Struc- Marion Building, Main 0272 tural Work andC astings Boiler Repairing Promptly Attended to Day or Night MARINE WORK A SPECIALTY ELECTRIC WELDING Works: 36-40 Illinois Street BUFFALO, N. Y. Cap’n Allswell says: Columbian. Design counts.”’ Operating for years without interrup- tion on many of the largest ships afloat, Paracoil equipment is accepted as standard throughout the marine world. Paracoil equipment includes the fol- lowing: Feed Water Heaters, Oil Heaters, Oil Coolers, Feed Water Filters and Grease Extractors, Evaporators, Distil- lers, Steam Traps, Exhaust Gas, Steam or Hot Water Generators—for Diesel Plants, and Rand System for Heating Bunker Oil. Write for our interesting catalog. DAVIS ENGINEERING CORP. 90 West St. New York City Factory: Elizabeth, N. J. ‘One ocean liner cut a whole day off of its run by changin’ to a Write for ‘‘Propellers in a Nut Shell’ Columbian Bronze Corporation, 238 North Main St., Freeport, L.I., N.Y. COLUMBIAN Bronze PROPELLERS Manufacturers of the Mulholland Simplex and Security Hatch Fasteners. For Ocean and Lake Trade OVER 225,000 SETS NOW IN USE ON THE GREAT LAKES “How Wooden Ships Are Built” By H. COLE ESTEP A book packed full of useful information for the busy practical shipbuilder. Every new method of construction shown in 188 big eagy-to-see illustrations. A complete story which takes the reader through every step of shipbuilding, beginning with the standing tree and ending with the trial ship with a supplement to laying off. Price, $3.00, (15s.) Postpaid THE PENTON PUBLISHING CO. Book Department Penton Bldg., Lakeside Ave. & West 3rd St. Cleveland, O. 424 M 16 MARINE REVIEW—December, 1927