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One drop flue boiler, 21 1/2 feet long ; shell, 10 feet diameter, with 12 1arge flues above and 186 return tubes below, eadi 3^ inches diameter. Grate surface, 54 feet. Fire and flue surface. 2651. Burns 3/4 ton of bituminous coal per hour. The centre of the shaft is 12 feet 6 inches above the upper surface of the keel. Draught, loaded, 11 feet. The "Oriental" carries 760 tons of freight, which, with the weight of her engines, boilers, and fuel, amounting to some 300 tons additional, shows her capable of carrying full up to her tonnage. Her speed, loaded, is about 9 miles per hour. The slip of the screw of the "Intemational" is, by these data, only about 5 per cent., that of the "Buffalo" only about 9, and that of the "Orient" about 22 per cent. ; the former being in all cases true screws. More careful notes must be taken before exact estimates can be formed of the amount of slip generally to be expected in screws so proportioned.