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THe Marine REVIEW 29 FIG, I.--CORNER IN ONE OF THE SMALLER MACHINE SHOPS, are about 275 electric motors for driving machine tools, cranes, etc., besides pneumatic ship tools, steam hammers and hydraulic presses. The most conspicuous structure on the premises is the "ship house" which is merely a huge steel framework for carrying the great cranes command- ing every spot of the area enclosed and having a clear lift of about too ft., sufficient to carry material to any part of large vessels lying on the stocks within. This skeleton 'building is 490 ft. long by 325 ft. wide and is divided longitudinally into four bays each equipped with a crane of nearly 8o ft. span. The spreading girders are not intended to support a roof; the form merely exemplies an eco- nomical disposition of material for carrying the cranes. A The ship tool shop which adjoins the ship house, is a large building containing practically every known arrangement for shearing, punching and forming plates and shapes into sections of a ship's frame or skin. The tools in this building are admirably arranged for convenience in handling plates of awkward sizes and shapes. The floor surrounding each punch and shear is as free from obstructions as possible, even all motors and wires being kept out of sight, and FIG, 2.--ONE END OF MAIN MACHINE SHOP. large tool being surmounted by a Swinging crane so that the men have free access to the work in hand and are free to guide it in any direction. The main machine shop is remarkable for the number of tools of gigantic proportions which it contains. There are huge lathes for turning the crankshafts of the largest battleships, immense bor- ing mills with revolving platforms flush with the floor, great planers large enough to monopolize the entire floor space of an ordinary custom machine shop, and in the side bays smaller tools of all sizes and for all purposes. In one end of the building the great engines of battleships are set up and fitted, later to be taken down and installed in the hulls of the steamers which they are to drive. The pattern shop contains a full equipment of the usual wood-working machinery, the upper floor of the building serving as the mold loft where the ships' plates are plotted and outlined. A new black- smith shop has been added to the plant during the past year. It contains some forty fires and a full equipment of hammers. A portion of the store. building is fitted up for the manufacture of electric equip- ment for the vessels under construction. FIG. 3.--MOTOR-DRIVEN LATHE TURNING CRANK SHAFT FORGING, The forge is the third largest in the United States and the only one in a ship yard capable of turning out the heavy work required in building the largest ships. Pro- peller shafts and- parts of guns are forged under steam hammers. The annealing plant adjoins the forge. It contains oil burning heating furnaces and vertical cylindrical annealing tanks for oil baths. There is a sawmill equipped with a: large band saw for cutting the timber used in ships. Also a brass foundry for casting brass valves and bronze and brass parts. No molding machines are used because the work varies constantly, and the metal is melted in crucibles exclusively. The power house is centrally located and is a building 162 ft. long by 65 ft. wide. There are six 6 by 16 ft. return tubular boilers set in brick and op- erated at 125 pounds pressure. The boilers are fired by hand, and there are no high chimneys, the Sturte- vant system of induced draft being employed. This draft apparatus is with the exception of the main engines and air compressors the only steam driven machinery in the entire yard. For driving the machinery of the plant there is one 350-kilowatt generator driven by a horizontal