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April, 1917 THE MARINE: REV LEW A Monthly Publication Devoted to Ship Building, Marine Engineering and the Business of Transportation by Water. Published by The Penton Publishing Co., Cleveland, Ohio, U. S. A. IN THIS ISSUE PAGE Many New American Aids to Naviga- Four-Year Test of Motorship Flett.... Columbia+Motorship of Latest Type.. : Tug Fireman to President Book Review Latest Marine News in Pictures Purifying Drinking Water on Ships.. Keeping Boilers Free From Scale.... England’s Yankee-Built War Boats. . World’s Merchant Ship Building in Sixty-One Concerns Control British Shipping Now. hy egg ee The Value of the Watertight Deck... ne a . eae: 4 Ri 151 Pioneer Steamships of the Great Lakes. DUNES COSSES, (2 axes BO IVER cc ee Poor Laws Hamper Steamboat Inspec- Red Hot Tips From the Trade Equipment Used Afloat and Ashore... 154 BRANCH OFFICES CHICAGO .- - 1521-23 Lytton Bldg. PITTSBURGH - + = 2148-49 Oliver Bldg. CINCINNATI 205: Lincoln Inn Court. WASHINGTON - 708 Metropolitan Bank Bldg. NEW YORK : 508 West Street Bldg. BIRMINGHAM, ENG. - + Prince’s Chambers Subscription $2.00 per year postpaid, all over the world. Single copies 20 cents. Back numbers over three months, 50 cents. The Cleveland News Co. will supply the trade with The Marine Review through the regular channels of the American News Co. European Agents, The International News Co., Breams building, Chancery. Lane, London, E. C., England. Entered at the Post Office at Cleveland, Ohio, as Second Class Matter. (Copyright 1917, by Penton Publishing Company) Please mention THE Marine REvIEw when writing to Advertisers