. American engineer and railroad journal . 0lbs. There are lo,,boilers, six of which are double-ended,z\\ ft. long and 15^ ft. in diameter. Two others are i8jft. long and 183 ft. in diameter, and the two others, single-ended, are 8 ft. long and 10 ft. in diameter. Eight of thelargest boilers are set in water-tight compartments. The accommodations for officers and crew are spacious,well ventilated and will be well lighted. All the mostmodern improvements of appliances for exhausting thevitiated air and for incandescent electric lighting havebeen incorporated in the designs. The sub-divisions of
. American engineer and railroad journal . 0lbs. There are lo,,boilers, six of which are double-ended,z\\ ft. long and 15^ ft. in diameter. Two others are i8jft. long and 183 ft. in diameter, and the two others, single-ended, are 8 ft. long and 10 ft. in diameter. Eight of thelargest boilers are set in water-tight compartments. The accommodations for officers and crew are spacious,well ventilated and will be well lighted. All the mostmodern improvements of appliances for exhausting thevitiated air and for incandescent electric lighting havebeen incorporated in the designs. The sub-divisions ofthe vessel are such as to form a double-hull below thewater-line, which will offer great security against disasterfrom torpedo attacks. A sister ship to the Columbia, at present officially knownas Cruiser No. 13, is under construction at the Crampyards. THE HARBOR DEFENSE RA-%r. The next ship to be launched is the harbor defense ram,known as the Ammen ram, from the fact that the designis due to Rear-Admiral Ammen. This ship has been built. HARBOR DEFENSE RAM, UNITED STATES NAVY. by the Bath Iron Works, at Bath, Me. We repeat here thegeneral description of this ship, and a sketch made fromthe Department plans. 422 THE RAILROAD AND [September, 1892. The principal dimensions of this vessel are : Lengthover all, 243 ft.; length on load water-line, 242 ft.; breadth, 43 ft.; breadth at water-line. 41 ft. 10 in.;draft amidships, 15 ft.; displacement, 2,050 tons; indi-cated , 4,Soo ; speed, 17 knots per hour. The vessel is designed upon the longitudinal and bracketsystem, with an inner bottom extending from the collisionbulkhead to the stern. The longitudinals and girderssupporting the deck are continuous, converging to the stemcasting and to the stern ; the frames and beams are inter-costal. The depth of the longitudinals and the verticalkeel throughout their lengtlris 24 in.; the girders supportingthe armored deck are 15 in. The vertical keel, two longi-tudinals, and th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
