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9o AROUND some engravings showing the boiler shops connected with these works, known as the Dry Dock Engine Works. These boiler shops, which adjoin the engine works and dry docks, are connected with both by railway swatches. As an evidence of its capacity, in addition to one small fire box boiler for a tug, there was building and under contract in these shops, during the winter of 1893, eighteen large boilers for six big freight and passenger steamers. The following table will prove interesting in showing the size of these boilers: Steamers and Owners. Number of Diameter. Length. No. Boilers. 112, Mackinaw Car Ferry----- 113, Eddy Bros., Bay City----- 114, D &C. S. Nav. Co______ 115, N.Y..C.&H. R.Ry-------- 116, D. &C. S. Nav. Co______ T17, Capt. Ruelle, Detroit (tug)---------------------------- 118, Northwest'11 Trans. Co_- The new shop for the manufacture of boilers is 180 feet long, 70 feet wide and about 50 feet in height. The main building, which is about 45 feet in width, is lighted by an immense skylight, and by continuous windows with heavy frames around the outward portions of the sides of the shop just under the roof. In 4 11 ft. 6 in. 18 ft. 2 14 ft. 2 in. 11 ft. 6 in 4 12 ft. 20 ft. 2 n ft. 6 in. 18 ft. 4 12 ft. 20 ft. 1 6 ft. 6 in. 12 ft. 2 14 ft. 2 in. 11 ft. 6 in LAKES." this main building, a 20-ton electric crane is fitted to an overhead system of tracks, so as to operate over the full length and width of the floor space, and another most important feature of the shop is a riveting tower 50 feet in height with a 25-ton radial hydraulic crane and a 100-ton hydraulic riveting machine. Back of the riveting tower and in an adjoining portion of the building is an engine of 100 horse power, two boilers, pump, accumulator and storage tank for the hydraulic machinery. Besides the ordinal punches, shears and counter-sinking machines, there is included in the general equipment of the works one 18-foot and one 20-foot plate planer, two drilling machines, a set of 20-foot boiler plate rolls capable of rolling plates 1 % inches in thickness and a hydraulic flanging machine. An L shaped addition to this main shop, 30 by 80 feet, contains part of the machinery, while in the old boiler shop, which adjoins the new structure, the blacksmiths' fires and some small machines are located. Accompanying the different views of these boiler works is a view of a portion of the dock yards of the dry dock company, showing the wooden steamer W. B. Morley, built at Marine City, by C. T. Morley, equipped with power by the Dry Dock Engine Works. The shear legs used in the dock yard for this purpose is also shown in the engraving.