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November, 1910 in, 57 in. and 96 in. diameter respect- ively, and have a common stroke of 60 om A h ?. fitted for the h. liner is fitted in the One p., two-piston valves separate cylinder. piston valve is for the m. p., and a double-ported slide All double-bar link Seec. for the Il. p. valves are worked by Stephenson "motion, fitted with the direct type of steam reversing gear. Cast iron pistons are used in the h. p. and m. p. cylinders, and a cast steel piston in the I. p. cyl- inder. Piston rods, cross-heads, and connecting rods are forged steel, the cross-heads have double slippers of cast iron, lined with white metal. The cyl- inders are supported by cast iron hous- ings of box section, and the bed plate is also cast iron, made in three sec- fons. The crank shalt is: Of the built-up type in three interchange- able sections. A horseshoe type of thrust bearing is fitted and all shafting is forged steel. The propeller is sec- tional with a cast, steel hub and four manganese bronze blades. An "Ed- wards" type air pump and two bilge pumps are driven from the |. p. cross- head; all other pumps are independent, as is also the surface condenser. The latter has a steel cylindrical shell with 'brass tubes tinned inside and out, which give a cooling surface of 9,300 sq. ft. Water is circulated through the con- denser by an independent centrifugal pump, driven by a single, 12-in. x 12-in. engine. The circulating water enters the bottom of the condenser and dis- charges at the top. All steam pumps are Blake Knowles make, and comprise two main feed, one donkey, one sanitary, one deck service, and one oil pump. There is also a Reilly feed water heater and a Ross grease extractor. The three main boilers are each 15 ft. 3 in. diameter x 22 ft. long, built for a working steam pressure of 200 Ibs. Each boiler has eight 39-in. furnaces with sep- arate combustion chambers, and 764 234-in. tubes. The total heating surface of the three boilers is 15,630 sq. ft., and total grate surface 410 sq. ft. The uptakes are fitted with air heating boxes as customary with heated forced draft installations, and all boilers are connected to a common stack. For the forced draft, there are two Sturtevant fans of 60,000 cu. ft. capacity per minute each, one located in each fire room m a recess in the coal bunkers. These fans draw air from the fire rooms and discharge into the ducts around the air heating boxes, the ducts being so at- ranged that each fan discharges air to and all the furnaces in the fire room, 1. which it is located. For discharging TAE Marine Review ashes overhead, there is fitted in each fire room one 6-in. See hydro-pneumatic ash ejector. A Williamson ash hoisting engine with 3%4-in. x 3.4-in. cylinders is also provided in the after fire room. A donkey boiler, 12 ft. 6 in. diameter by 10 ft. long, is provided for use in port. This boiler has three 39-in. fur- naces, 58% sq. ft. of grate surface, 1,541 sq. ft. of heating surface, and is built for a working steam pressure of 200 lbs. Speed Requirement. The contract for these vessels requires them to maintain an average sea speed of 15% 'knots for the round trip be- tween New York and Galveston, when loaded with 4,000 long tons of cargo, in addition to fuel, water, stores, etc., the coal consumption not to exceed 1.6 Ibs. per i. h. p. per hour. On her maiden trip, the El Sol averaged over 16 knots for the round trip, and the coal con- sumption for the trip averaged less than 1% lbs. per i. h. p. per hour. This ex- cellent showing is naturally very gratify- 427 ing both to the owners and to the build- ers. The contract for these four vessels is the fourth order of .four~ vessels each, which have been given the Newport News company by the Southern Pacific company. The Newport News company also built the freight and passenger steamships, Comus and Proteus, for the same own- ers, this making a total of eighteen large vessels they have built or are building for the Southern Pacific company. The fourteen vessels, previously built, were all built from the same model, and are 390 ft. long x 48-ft. beam x 33-ft. 9-in. depth, fitted with machinery of 4,000 i. h. p., which enable them to maintain a service speed of 14% to 15 knots. Of these vessels, all are now in the South- ern Pacific company's fleet, with the ex- ception of the first four built, which were sold to the United States Navy during the Spanish war, and converted into the auxiliary cruisers, Yosemite, Yankee, Dixie and Buffalo. Interesting British Salvage Feat ALVAGE people and engineers in S Britain have been much interested quite recently in the raising of the Mersey docks and harbor board dredger, Walter Glynn, which capsized in the Mersey during a heavy gale in the early part of September. The lift is the heavi- tem adopted by the docks board's skilled salvage officers was something like that which proved so successful in the rais- ing of the Gladiator. Fig. 1 shows the vessel as she lay on her port side at low water, and unfortunately very close up to the river wall near the Seaforth Fic. 1--Mersey Docks Boarp DREDGER, WALTER GLYNN, CAPSIZED. est which has taken place onthe Mersey, seeing that the dredger after being dis- mantled as much as_ was possible. weighed over 1,500 tons, and the sys- battery. Fig. 2 depicts the final effort to right the dredger. "Humps" or cam- els were pinned to the vessel at low water, so that when the tide rose they