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244 | Marine Patents Copies of any one of these patents can be obtained by sending fifteen cents in stamps to Siggers & Siggers, patent lawyers, Suite No. 11, National Union Building, Washington, D. C.: 1,095,344. Propeller for Boats. Peter J. Miller, Peck, Idaho. 1,095,461. Ship- Propulsion. |. Wm. L. R. Emmett, Schenectady, N. Y., assigned to General Electric Company, a corporation of New York. 1,095,485. Internal Combustion En- gine. Wilson D. Craig Wright, Phila- delphia, Pa., assignor of one-half to Joseph Wright, Germantown, Phila- 'delphia, Pa. 1,095,556. Life Boat. Joseph Danko and Joseph Potoczky, Toledo, Ohio. 1,095,565. Internal Combustion En- gine. Jeffrey T. Ferres, Los Angeles, Cal: 1,095,730. Rotary Internal Combus- tion Engine. Harold M. Jacklin, Lansing, Mich., assignor of one-half to Jeremiah Jacklin, Lansing, Mich. 1,095,732. Screw Propeller. Hugo Keitel, Dusseldorf - Oberkassel, Ger many, assignor of one-half to Jere- miah Jacklin, Lansing, Mich. 1,095,831. Anchor for Submarine Mines. Giovanni Emanuele -- Elia, Paris, France, assignor, to Vickers, Limited, Westminster, England. 1,095,919. Ship's Buffer. John Ont- ko Jr., Smithfield, Pa. 1,094,429. Valve of Internal Com- bustion Engines. Matthew E. Dins- combe, Bristol, England. 1,094,487. Ship's Course Recording Device. Francesco Spalazzi, Rome, Italy. 1,094,554. Internal Combustion En- gine. Pauline Hartman Coggin, Sa- lem, Mass. . 1,094,555. Auxiliary Air Device for Internal-Combustion Engines. Patrick H. Grace, Los Angeles, Cal. 1,094,610. Boat Fastening Means. Frederick Steinhauer, Madison, Wis. 1,094,617. Apparatus for Hoisting and Lowering Ships' Boats. Axel Welin, London, England, assignor to Welin Marine Equipment Company, a corporation, of New York. 1,094,620. Thrust-Bearing for Pro- peller-Shafts of Ships. Hugh Wilson, Buffalo,. N. Y. 1,094,790. Rotary Internal Combus- tion Engine. John Royal Jahn, River side, Cal, 1,094,993. Cooling Internal Com- bustion Engines. Bertram Hopkinson, Cambridge, England. 1,095,002. Internal Combustion En- gine. Simon Lake, Milford, Conn, 1,095,102. Internal Combustion En- gine. Levi S. Gardner, Shreveport, Tea: THE MARINE REVIEW 1,095,106. Means for © Propelling Ships and the Like. Marcel Goun- ouilhou, Bordeaux, France. Trials of Power Cruiser -- By A. E. Luders. Having been able to make a great deal of use of the various papers on the subject of resistance of ships and models read before this society, it has occurred to the writer that possibly similar data of a type of vessel that has not been touched upon in previous papers may prove of in- terest. : For this purpose the owner, Robert T. Fowler, of the 60-foot gasoline cruiser Kathmar II kindly placed this boat at my disposal and a number of runs, results of which are plotted on a curve sheet, were made. To supplement this practical information the navy department most courteously agreed to make and test a model of this boat under similar conditions of draught--their interest making this paper possible. The results of the model experi- ments as made by them are given on the same sheet as the other in- formation. The trials were over the New York Yacht club course, 1.1 knots at Hemp- stead bay, where four double runs were made. Kathmar II was launched in the spring of, 1911, at. which' time, she floated--in light cruising trim--at her designed L. W. L. The difference of displacement on the 1913 trials is ac- counted for by the boat being deeply laden, preparatory to starting on an extended course, by soakage and the gradual augmenting of equipment, etc., that occurs from season to season. The bottom of this boat had not been painted for three weeks and was undoubtedly soft, though not foul. This probably explains somewhat the increase in h. p. ovér model experi- ments by an amount that indicates that the actual skin friction was prac- tically double-the theoretical. The increased h. p. required to drive the boat with the stern cut off square at the waterline was unexpected. The H. SH.° Pe from: trial was de- duced from the thrust of the propel- ler (the wheel being deeply immersed, only 3 per cent of wake was assumed), and using results of Prof. Durand's investigation as a basis from which to work by the laws of comparison of similar propellers. On the basis of a propulsive co-efficient of 65 per cent the h. p. at the 10.26 knot point *Read before Society. of Naval Architects and Marine Engineers, New York, June, 1914 agrees well with the brake test of the motor. In general, the design of Kathmar II proved very satisfactory in seq- worthiness and stability, and was somewhat faster than similar boats of the same power. Passing of British Warships Several British war vessels are soon to be offered for sale, among them the protected cruiser Scylla, in which Sir Percy Scott began the movement which has resulted in making British naval gunnery the wonderfully per- fect thing it is. The Scylla was one of three cruisers' built in 1890 and 1891, and is of 3,400 tons displacement. She .was for some time used as a drill ship for the Royal Naval Reserve and for duties in connection with the New- foundland fisheries. The battleship Re- nown, another warship to be put up at auction, is chiefly remembered for the fact that she convoyed the King and Queen to India at the time of the Durbar, and prior to that was the favorite flagship of Lord Fisher. She was laid down in 1893 and has a main armament of four 10-in. and ten 6-in. guns. Her displacement is 12,350 tons. The Resolution, another battleship 'which will also come under the ham- mer, is a well known ship of the Royal Sovereign type. The Resolution proved such a trying seaboat in her early days that she was named by sailors "the rolling Resolution", and this name stuck to her until the end of her career. She was laid down in 1892, and is of 14,150 tons displace- ment. None of these vessels is yet 25 years old, still they are obsolete and have been ever since the dreadnought | came out in 1905. z The Majestic Sold Another famous transatlantic liner of the 90's is to pass. This time it is the White Star liner Majestic, which has been sold for $125,000, to. oe broken up for the metal that is' in her. The Majestic and Teutonic (the latter now is in the Canadian service) were sister ships built by Harland & Wolff in 1889, and in their day were of the best vessels in the Atlantic trade. Since they were built, however, the dimen- sions of passenger steamers on the Atlantic have almost doubled, as they were only 568 ft. long, 57% ft. beam and 42 ft. deep. The best speed of the Majestic was 20.4 knots. The steamship Atlantic, building for the Emory Steamship Co. at the Fore River Shinbuilding Corpora- tion's yard at Quincy, Mass., was launched on May 26th.