. Monthly nautical magazine, and quarterly review . th a commendable degree of wis-dom. The private builders of the United States were the first to demonstrate thepropriety of bringing this point aft to, or abaft, the mid-length of load-line, even infreighting vessels ; and vessels for speed demand it still farther aft. In 33 vesselsof the British Navy, the greatest distance of the centre of gravity of displacement, orcentre of buoyancy, forward of the mid-length of load-line, is feet, or not quiteone-eighth of an inch; in the Portsmouth it is feet ; and the greatest dis-tance of th
. Monthly nautical magazine, and quarterly review . th a commendable degree of wis-dom. The private builders of the United States were the first to demonstrate thepropriety of bringing this point aft to, or abaft, the mid-length of load-line, even infreighting vessels ; and vessels for speed demand it still farther aft. In 33 vesselsof the British Navy, the greatest distance of the centre of gravity of displacement, orcentre of buoyancy, forward of the mid-length of load-line, is feet, or not quiteone-eighth of an inch; in the Portsmouth it is feet ; and the greatest dis-tance of the centre of gravity of load water plane, forward of mid-length, is , while in the Portsmouth it is feet. These vessels range from 120 to 10guns. In the Royal Albert, Queen, Arethusa, and the Phaeton, (of 50 guns, andthe best of her class,) these points are near one-eighth of an inch abaft our Naval Constructors inform our readers how these points are located inthe new steam frigates! 332 The Monthly Nautical ENGINES AND BOILERS FOR AN ATLANTIC PASSENGER STEAMER OF 5,000 TONS. The engines to be constructed will be the vertical beam engine withdouble balance valves, with boilers, in number and capacity, such as shallbe sufficient to evaporate a supply for engines of 3,500 horse power. Cylinders, two 108 inches diameter, with a stroke of piston of 12 feet, tobe of cast iron, accurately bored, and flanges and steam openings, facedbands, brackets on front to receive rock shaft bearer, with flanges for guidescast on same. DESCRIPTION OF ENGINES. Bed Plates.—Of cast iron, containing the usual channel of communica-tion between condenser and air pump, with sufficient number of ribs forstrength, and holding down bolts in quality and quantity without stint. Condensers.—Of cast iron, to be fitted to bed plate by a face and rustjoint, to be cast with flanges, and on side for securing to gallows frame. Cylinder Pistons.—Of cast iron, with double
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