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1901.] MARINE REVIEW. 13 —S ts oy oa ee | q aa uneayy { Ng i Yj ¥ Tug Wilmington. Built by the Harlan & Hollingsworth Co., Wilmington, Del. ship. Where there are intermediate side stringers below main deck there is a short, double reverse frame extending up to the tops of such interme- diate stringers. Throughout the engine space these frames are double to the top of upper bilge stringers, and also double to fore end of boiler space to the half turn of bilge. They are also doubled in the cargo space to outside of half floor keelson for one-third the length of the fore-and-aft holds, the balance to ends diminishing in length to meet requirements. There are also double reverse bars on the line of all keelsons and stringers, and likewise to all belts or frames where required. No butts are nearer The Grecian. The Chesapeake. Built by the Harlan & Hollingsworth Co., Wilmington, Del. than 5 ft. The floors are of 10-16x24 in. for half of the mid-length of the vessel, the balance at ends reduced to 8-16 in. Under engines they are of increased depth. Butts are all double strapped and treble riveted. The intercostal plates of the center keelson are 9-16 in. thick for two-thirds of the center of the vessel, the balance at each end being re- duced to 8-16 in., and at bow, where increased in depth, are 7-16 in. thick. The intercostal plates in engine and boiler space are 10-16 in. thick. The rider plates are 12x11-16 in. for two-thirds the length, then reduced to 10-16 in. at fore end and to 9-16 in. thick. Angle bars are riveted in staggered line, the butts well fished. The half-floor keelsons are inter- costals, 1-16 in. less in thickness than’ the floors’ to which they connect. They are secured by 3x3x8-16 in. angles to floors and outside plating, and joggled over the reverse frames. The lower bilge keelsons are angles 5x314x10-16 in. in long lengths. The upper bilge keelson are 8x in. bulb angles and 4x%4 in. angles, the butts being shifted 10 ft. apart. The hold and intermediate stringers are of 4x4x¥% in., doubled at ice line at bow and having intercostal pieces terminating on a V plate, all connecting to skin. Beams of main and lower deck are of bulb and T, 10x10-16 in. at all hatches, and 10x9-16 in. for the balance. The beams of the spar deck are of bulb and T 7!4x8-16 in. at hatches and 6-16 in. thick for balance. The lower deck stringers are 33 in. wide by a scant 9-16 in. thick for half mid-length and teduced to 8-16x25 in, at ends. These connect with V plates, all connected to sides plating over bunkers, and water ballast, and for the length of machinery and boiler space plated with 6-16 in, iron butts doubled chain riveted; edges lapped and single riveted; butts of stringers treble-chain riveted half mid-length and balance double; forward and aft of deck plating taper connection being made to the stringer plates. The stringers between the main and lower decks are of double angles, 4x4x¥% in., with plate 8-8 in. thick connecting to side plating by angles 3x8x% in. terminating on a V plate at stem. The main deck stringers are scant 9-16 in. thick by 438 in. wide for half the mid-length of the vessel, and then by gradual reduction taper to 30 in. by 8-16 in. at ends, connected through to side plating. The butts for three-fifths the mid-length are treble-chain riveted; balance double-chain riveted; water- way angles 4x3x9-16 in. continuing entirely around the butts, weel shifted, caulked water-tight and cemented, making a slope from outside plating 4x3x9-16 in.; angles forming waste basins where the hoisting and steering engines are located. The deck plating is 6-16 in. in thickness, increased abreast of the machinery hatch, under the windlass and small engines, and decreased in thickness forward and aft of location of engine and boilers. These plates are capped longitudinally throughout, being single-riveted. The butts are of loose joints, double-chain riveted. The passage openings through the spar and main decks are 24 in. in diameter, being made of angle rings in order to give access to the forward and aiter lower between-deck ports. The spar deck stringers are 43 in. wide for half of the mid-length of ves- sel, 9-16 in. thick abreast of large side ports, and extend 4 ft. each way of same in one sheet, and between these are 7-16 in. thick. They diminish to 30x6-16 in. at ends of slip. The deck ties continue fore and aft along the machinery and other hatches, 7-16x24 in. The main ties are treble- chain riveted throughout, the space of the donkey boiler and pumps being M%4-1in. iron deck. The bottom and bilge plating to top turn of bilge is 21-32 in. thick for half mid-length of vessel, then reduced by regularly diminishing as per rule to ends of vessel, exception being made in the The Mannahata. The San Juan. boss plates, which are 21-32 in. The inside strakes for half mid-length are 23-32x30 in., reduced to 21-32 in. at ends, The sheer strake is 34 in. wide by 12-16 in. thick, reduced by regular diminish from half mid-length to 9-16 in. aft and 10-16 in. forward, the butts being treble-chain riveted to beyond the two large side ports; double-riveted lower seam and single to top side plating on butts. The pole masts are of steel, about 128 ‘ft. above the step or lower deck. The main deck is of seasoned yellow pine, sheathed with spruce. There are an unusual number of freight cranes, and the facilities for getting cargo in and out are fully up to the best practice. he 7 The Whitney has a triple expansion engine of surface-condensing, direct-acting type. The high pressure cylinder 29 in. diameter, inter- mediate 46 in, and low pressure 75 in., with 48 in. stroke of piston. There is a full set of Blake pumps throughout the ship, the air pump being inde- pendent. The propeller wheel is 16 ft. in diameter by 21% mean pitch, the hub being of cast steel and the blades of manganese bronze. There are four main boilers of steel, with cylindrical shells, and three Morri- son corrugated furnaces in each. They are each 13 ft. long by 14 ft. in diameter. The ship is lighted throughout by electricity, the engine being of the Forbes type, with a Croker-Wheeler dynamo. Other features of equipment are a steam steerer and two stockless anchors, one weighing 4,000 Ibs. and the other 3,500 lbs. There is also a 750-Ib. kedge anchor.