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a MARINE REVIEW AND MARINE RECORD. [Jan. 1, The New Battleship Maine. One of the types of the year in the warship line is the battle- ship Maine which was completed in the summer and underwent her trial trip in September last. On her trial trip she exceeded by a trifle her speed requirement of 18 knots. She is once again as big as her namesake, whose destruction led to the Spanish- American war. She went into commission during the present week. The leading particulars of the new Maine are: Penety on load water line...:....,...2 2. oo aes iene oi 388 ft. ee ee 72 ft. 2% in. Piepecement 4f trial draught of 2314 ft.../....2.. 12,500 tons. Freeboard, forward at the bow ....... oe 20 ft. Mieepoard, aft at the stern :...... 7° Ce 213 16 Height of axis of forward 12-in. turret guns above water. .26% ft. Height of axis of after 12-in. turret guns above water...... 19 ft. Height of axis of main-deck 6-in. R. F. broadside guns. .15%4 ft. Height of axis of upper-deck 6-in. R. F. broadside guns. .2334 ft. Height of axis of machine guns in upper tops above water. 370. tt. Height of axis of machine guns in lower tops above water. .60 ft. Height of sight holes in conning tower above water.... -34% ft. The main battery consists of four 12-in. breech-loading rifled guns, and sixteen 6-in. rapid fire ~uns. 'The 12-in. guns are installed in two Hichborn balanced turrets,:.11 . in. thick, located on the center line and mounted in circular barbettes 12 in. thick, extending down to the protective deck. 'Twelve of the from the maximum thickness abreast the turret to 4 in. thick at the stem. Protection to the after end of the vessel is provided by a heavy protective deck made of 120-lb. plates. The case- mate armor protecting all the 6-in. guns is 6 in. thick. 'There are also splinter bulkheads, in thickness 114 in., located between the guns to localize any damage in action. The conning tower and shield are each Io in. thick, with an armored tube 7 in. thick ex-- tending below to the protective deck. 'The signal tower is cylin- drical in shape, 6 in. thick, and located forward of the after turret. The protective deck extends for the entire length of the vessel, the outer edge being 4 ft. below the water line. The lower course is of 4o-lb. plates; the upper course on the flats 62% Ibs. and on the slopes 70 Ibs., with 120-Ib. plates aft over the steering gear. Protection is further assured by a cofferdam worked en- tirely around the vessel in the neighborhood of the water line, in which is packed between 4o and 50 tons of corn-pith cellulose. A double bottom, built of 3-in. inner bottom plates, is worked the whole length of the machinery space and also under the magazines forward and.aft. This space is sub-divided into numerous -water-tight compartments, in order to localize any in- jury that may occur to the bottom of the vessel. These com- partments are connected by means of pipes with the drainage and pumping systems of the vessel, so that water may be carried in these spaces for trimming purposes, or pumped out as. required. Large and small, there are about 400 compartments, mostly water- The New Cramp-built Battleship Maine on her Trial Trip. 6-in. guns are mounted in broadside on the main deck, two of which can also fire directly ahead. The remaining four 6-in. guns are mounted on the upper deck amidships on each side, two being able to fire directlv ahead and two directly astern as well as on broadside. The secondary battery consists of twenty 6-pounders, six 1-pounders and four Gatlings, with one 3-in. rapid fire field gun. The 6-pounders and other secondary bat- tery guns are located on the after berth deck, upper deck, bridges and in military tops. There are also two submerged torpedo tubes, one on each side, below the protective deck forward of the forward turret.. 'I'he Maine carries eight 17-ft. torpedoes. They are the first underwater torpedoes introduced into the United States navy, though they are being used very generally in all battleships building abroad. The 6-in. guns are 40 caliber, with a muzzle velocity of not less than 3,000. ft: per second for the 12-in. guns. The water line belt is 714 ft. in depth, that is extending from 4 ft. below the water line to 3%4 ft. above it, and from the stem to abreast the after side of the after barbette. The maximum thickness is 11 in., tapering from that thickness at 1 ft. below the water line to 714 in. thick at the lower edge. It also tapers [Photograph copyrighted by W. H. Rau, Philadelphia, Pa. tight, throughout the vessel. In addition to the protection given by the armor and cofferdams, the boilers and engines are surrounded by a deep body of coal, the bunker capacity being fully 2,000 tons, an unusually large quantity in a vessel of this size. The motive power consists of triple-expansion, twin-screw propeller engines, with Niclausse water-tube boilers to indicate about 16,000 H. P., with assisted draft. The engines are verti- cal, three-cylinder, of a collective power of about 8,000 Hi. P each. The working pressure in the boilers is about 256 lbs. per square inch and 200 lbs. per inch at the engines. The boilers. are placed in water-tight compartments separated by middle line bulkhead. The diameter of the high- Pressure cylinder is 3814 in, that of the intermediate cylinder 59 In. and the diameter of the low-pressure cylinder 92 in. ; length of stroke of all pistons 42 in.; number of revolu- tions on trial between 122 and 130 per minute. 'The screw pro- pellers are three-bladed, made of bronze and about 14% ft. in diameter. 'he boilers are twenty-four in number, arranged in three groups. The total amount of heating surface is 58,104 sq. ft. and the grate surface 1,353 sq. ft. The smoke pipes are three in number, and in height about 90 ft. above the level of the grates.