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THE MARINE REVIEW May, 1917 GOLD MEDAL Highest Award MarineDiesel Engines Panama-Pacific Exposition 120 H.P., Four Cycle Nelseco Diesel—Heavy Duty Reversing Gear Type 00,000 H. P. NELSECO DIESEL ENGINES In Service in American and Foreign Vessels 50,000 H. P. Now Building Sizes: 120, 180, 240, 360, 480 to 3000 H. P. NEW LONDON SHIP & ENGINE CO., Groton, Conn., U. S. A. MN Long Stroke Riveting Hammers The Hammer That Can’t Come Loose Shipped on Trial FREE The Thor One-Piece Long Stroke Riveting Hammer has revolu- tionized the use of pneumatic _riveters. With the handle and barrel made from a solid drop forging in one-piece, it is Impos- sible for them to work loose. There is no interruption on the work — no stopping to tighten the handle which means more work per day. n. Drift Bolts in Ship Ways with No. 90 Thor Driving 3 ft. x Ife i “Safety First” Hammer. Several recent tests have proven that the Thor Hammers cost fully 3344% less to maintain. Our repre- sentatives will give you data pertaining to these tests. Don’t this great saving — mean something to you> Thor Ham- mers are especially adapted for shipyard use. INDEPENDENT PNEUMATIC TOOL COMPANY Pittsburgh Chicago New York Detroit San Francisco Please mention THE Marine REVIEW when writing to Advertisers Birmingham Montreal