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Marine Review The National Publication Covering the Business of CLEVELAND Published monthly by The Penton Publishing Co., Cleveland, Ohio, U. S. A. Cleveland Office, Penton Bldg. H. Cole Estep, Vice President A - Jansson, Editor 1) - D. Pease, Advertising Director F. V. Cole, Circulation Manager H. O. Taylor R. C. Coursen Boston Office, 1037 Old South Bldg. H. R. Simonds Buffalo A. G. Raufer Detroit V. E. Dolan Chicago Office, 1147 Peoples Gas Bldg. L. C. Pelott Fred P. Pletcher W. W, Maloney New York Office, 220 Broadway, Joseph Fuller, Eastern Representative E. C. Kreutzberg B. K. Price Pittsburgh Office, 2148 Oliver Bldg. S. H. Jasper W. H. Lloyd San Francisco Office, 24 California St. Don Partridge Washington, D. C. Office, 1653 Pennsylvania Ave. | Be M. Lamm London Office, 2-3 Caxton House, Westminster, S. W. 1 Vincent Delport Subscription United States and its possessions, $3 per year; Canada $4.00; Great Britain and other Foreign Countries, £1:0:0. Single copies 35 cents. Back numbers over three months 50 cents. The Cleveland News Co. supplies the trade with MARINE REVIEW through _ the regular channels of the American News Co. European Agent, The International News Co., Breams building, Chancery Lane, London, E. C., England. Member, the Audit Bureau of Circula- tions, Associated Business Papers, Inc. and the National Publishers Association. En- tered at the Post Office at Cleveland, Ohio, as Second Class Matter, under the act of March 3, 1879. Copyright 1927 by The Penton Publishing Co., Cleveland, O. Transportation by Water FOUNDED 1878 CONTENTS NEW YORK Vol. 57 June 1927 No. 6 Page Sail Power Aided by Auxiliary Motors............ 11 Superheat Improves Operation..............cc00..ccc0000 13 By Frank Page Improve River Towboat Design..............0.........060 16 By R. H. Bacon Are Lake Vessels Efficient ?....................cces0see0000 21 By R. C. Stanbrook S. S. Yarmouth Will Enter Service in June.... 22 Steamer Harry Coulby, Lake Freighter Launched oii 2a Diesel Electric Is Practical ...0035..05....2 2 24 By H. C. Coleman Great Lakes Shipyards Are Busy.................... 28 By A. H. Jansson Diesel Electric Tugs Building at Panama........ 29 Channel Steel System Applied in Lake Freighter | 6.25 ouciieca 31 By Wilford G. Bartenfeld Latest Marine Events in Pictures........................ 35 Dock Management Progress Section................ 36 Cargo Handling Cost in Port of New York By James A. Jackson Books—Review of Latest..............cccccccsssssccssssescees 38 Equipment Used, Afloat, Ashore........................ 39 Maritime Law—Late Decisions....................ccc0008 40 By Harry Bowne Skillman Ports—Marine Business Statistics..........00.....00.. 41 Cleaning of Steamer Washington Irving............ 42 Disasters—Marine, Late Flashes On................ 43 What the British Are Doing............2........ 44 What’s Doing Around the Lakes............0..000... 44 Freight Rates and Bunker Prices...................006 45 Personal Sketches of Marine Men.................... 46 Prof. Herbert C. Sadler, D. Sc., Professor of Naval Architecture, University of Michigan By A. H. Jansson Steam River Towboat Engine...........c.cccccccesssesseeees 50 Sales of Ships—Recent................0csc----sessesssossseeeess 56 Trade Publications Reviewed...................:ccccccceeees 58 58 Business News for the Marine Trade................ MARINE REVIEW—June, 1927