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350 wing turbines, this arrangement of machinery allows the use of the cen- tral turbine, which can develop more than one third of the total power, while the sub-division of the main boilers in two groups always allows the use of at least one-half the boiler power and at the same time permits an ideal arrangement of coal bunkers. The coal bunkers run alongside and above the boilers; and on each fire- room there is also a transverse bunk- er for use in action; when owing to the easier handling of the coal, it will be possible to attain the maxi- mum. speed. The coal bunkers have a total ca- pacity of 4,000 tons and the oiltanks in the double bottom will contain 660 tons of fuel oil. Speed, Trials, and Radius of Action. _ The main turbines can develop 39,- 500 H. P. with 1 in. of air in the fire- rooms, but the blowers will be re- quired to produce a pressure of 2 in. -of water. With a displacement of 27,500 tons, this power will give the ship a speed of 22% knots, which is to be maintained for 8 hours. Besides this trial, which is to be considered as the most severe and which will amply insure the ship a speed of 2214 knots under ordinary service condi- tions, there will be a 30-hour endur- ance trial at 20 knots, and a 30-hour coal consumption trial at 15 knots. All these trials will be preceded by the necessary 'preliminary trials. The radius of action on' coal only is to be 10,100 knots at 11 knots speed, 7,200 knots at 15 knots speed, and 3,600 knots at 22.5 knots. If the high speed trial were conducted under or- dinary lead conditions, the displace- ment would be 26,500 tons, instead of the required trial displacement of 27,- 500 tons, and the corresponding speed at the reduced displacement would 'be nearly 23 knots. Artillery and Torpedoes. The. main battery consists of 12 _ I2-in. 50-caliber guns, mounted in pairs in. six turrets arranged so as to fire ' all on either side; twelve 6-in. 50-cal- iber guns installed in the central casemate, six on each side; and twelve 4-in.. 50-caliber guns, besides smaller field and saluting guns. The 12-in. gun turrets will have a protection of 12-in. armor in front, 9-in, armor at sides, 1l-in. armor at back, and. 3-in. armor on. top. - The circular barbettes, which serve as support to the turrets, are 9 in. thick. The armor and guns will be manufactured by the Bethlehem Steel Co. THE MarRINE REVIEW Follows some gun data: Muzzle en- Shots per min. Initial Caliber Weight of velocity ergy tons-- of guns. shell, kg. mt. per sec.' meters, per gun. 12-1n, 349.2 914.4 16,890 2 6-in. 47.6 914.4 2,028 6to8 4-in. 15 914.4 640 12 The 12-in. guns are capable of per- forating an armor plate of cemented steel 14 in. thick at 6,000 meters. The magazines have a capacity of 120 rounds for each of the 12-in. guns, 300 rounds for each of the 6-in. guns, and 350 rounds for each of the 4-in. guns. tee pega The axis of 12-in. guns above the water line is as follows: in, in. in. in, in, in. Turret No. 'Lurret No, Turret No. Turret No. Yurret No. Turret No. Ls torward 31. it. 2 forward 39 ft. 3 forward 31 it. 4 forward 31 ft. 5 forward 31 ft. 6 torward 22> it. 0 G0 0 0 The axis of the 6-in. guns is 19 it. 6 in. above' the normal water line and was fixed to overcome the faults ob- served with lower batteries, which in rough weather are practically use- less, owing to the necessity of clos- ing the gun ports. The 4-in. guns and munitions are equal to and in- terchangeable with the same size used on the destroyers, which will be man- ufactured by the same concern. These ships will be fitted with two 21-in. submerged torpedo tubes using tor- pedoés equal to those that will be used on the destroyers. Conning and Fire Control Towers. There will be two conning towers, one forward of 12-in. armor and one abaft of 9-in. armor. The fire control towers will be located as follows: One on the auxiliary mast, one above each conning tower, one auxiliary station on each side of the ship on small independent armored turrets; one main central station within the casemate under the protective deck. Miscellaneous. The upper and lower protective deck will have 1%4-in. and 3-in. ar- mor. The electric power will be sup- plied by two main stations in dupli- cate, each fitted with turbo-dynamos capable of generating all the power required in action, and located within the armored casemate. There will also be a third installation, operated by heavy oil motors, of sufficient pow- er to illuminate the ship and also to handle some of the turrets for prac- tice. This station will obviate the necessity of maintaining 'boilers un- der pressure for auxiliary service in the harbor, which ought to result in better preservation of boilers steam piping. Searchlights. of and suf- September, 1910 ficient number and power will be conveniently located. Memorandum of Argentine Ships. Tonnage, 27,500 normal. Speed, 22% knots. ; Main belt armor, 12 in, thick. Price per ship, £2,190,000 sterling. Time of completion, 24 and 27 months. Armament, 12 12-in. guns in turrets (50 cal.), 12° 6:10, 812° 4-in, Machinery, 3 Curtis turbines of 40,000 H. P. Boilers, B. & W. watertube. Ships can fire twelve 12-in. guns on either broadside--8 ahead and 8 astern. One vessel will be built at the Fore River Ship Building Co., in 24 months, and the second vessel at the works of the New York Ship Building Co., in 27 months, both vessels to be de- signed and engined by the Fore Riv- er Ship. Building Co. Britain's Largest Battleship Launched On Saturday, Aug. 6, the battleship cruiser Lion was launched from the gov- ernment dock yard at Davenport. The vessel is not only the largest warship in the British Navy, but she is easily the fastest and most formidable armoured cruiser afloat. Although officially termed a cruiser, her broadside fire of eight 12-inch guns will be as heavy as the Dreadnought's, notwithstanding that she will mount only eight in all of the big weapons, as against the ten of the latest British battleships. Her over all length is 700 ft. by 86 ft. 6 in. beam, as com- pared with the Lusitania and Maure- tania's length over all of 790 ft. and beam of 88 ft. The great stride in size represented by the Lion is shown by the following table, comparing her dimen- sions with those of the Indefatigable, Britain's latest armored cruiser prior to Saturday's launch: Seen et H.M.S. H.M.S. Lion. Indefatigable. . We CNSE as feces ces 700 ft. 596 ft. Bean Cee ae 86 ft. 6 in. 80 ft. Displacement...... 26,350 tons 18,750 tons Designed speed.... 28 knots 25 knots Horsepower....... 70,000 45,000 The propelling machinery consists of Parsons' steam turbines, driving four screws, and giving an estimated shaft horsepower of 70,000. Her steam gen- erating installation will consist of 42 water tube boilers. This propelling ma- chinery--the most powerful in any ves- sel so far constructed--is being supplied by Messrs. Vickers, Sons & Maxim, Barrow. : The main armament comprises eight 12-in., 50-caliber guns, mounted in pairs, all four turrets being on the middle line af the ship. The guns in each of the inner turrets can be fired over the outer turrets, and, owing to the greatly in- creased deck area, the striking power shows a great improvement over that of the Indefatigable's guns. The armor