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April, 1910 valve e will be open, admitting com- pressed air to the valve-chamber, When it is desired to tip the barge, the rope / is given a first pull. This causes the apparatus to take up the position shown in Fig. 5, the slide- valve then admitting compressed air to pipe b, and so to tank 4A. The lever n is unaffected by this first movement. When the rope is released, the operat- ing lever returns under the action of the spiral spring, without any further -- movement of the cam. It will now 'be clear that a second pull on the rope, rotating the cam through a further 90 degrees, will return the apparatus to its original position, as shown in Fig. Fic. 5. Atr VALVE IN SECOND POSITION. 4, with the exception that the cam will be turned through 180 degrees from the position shown. If, owing to the nature of the load, the barge has dumped without the level of tank D fall- ing below that of A, these two pulls on the rope / will have completed the operation, and the barge may be re- turned to harbor for a fresh load; but if it is necessary to admit water to tank C, as before explained, a third pull is given to the rope. Owing to the position of the cam, this third pull does not affect the slide-valve, but causes a movement of lever n, which opens the valve g, so that the barge gradually rights, as previously explained. 'A fourth pull on the rope restores mat- ters to the position shown in Fig. 4. The tank B is supplied with com- pressed air at about 100 lbs. pressure, and is charged by coupling a hose to the top of the valve-chest. requires about 6 tons of water for every 200 tons of load on deck. The barge illustrated has been supplied to Stockholm, and was designed and constructed by A. F.. Wiking, of Stockholm. PROPOSED 600,000-HORSEPOWER HYDRO-ELECTRIC PLANT. According to the Canadian Electrical News, the Long Sault Development Co., in conjunction with the St. Lawrence Power Co., proposes, if its scheme is approved at Ottawa, to build a 4,500-ft. dam, 45 ft. high, across the St. Law- rence river at the head of the Long Sault rapids, and to build an_ electric Tank A' TAE Marine REVIEW plant to develop 600,000 horsepower. The project is favored by the towns and municipalities in the vicinity, which hope to profit by cheap power. Opposition is being raised by the Ontario govern- ment, the Conservation Committee at Ottawa, and various other bodies, who see in the proposal a possibility of an encroachment on Canadian resources for the development of United States en- terprises. It is also feared that the navigability of the river may be affected by the diversion of so great a quantity of water. The latter objection, however, is met, for the companies, by a promise to provide a new ship channel of ample proportions on the south side of the river. Apparently almost unlimited cap- ital is behind the scheme, which is planned to cost in the neighborhood of $20,000,000. NEW FIRE BOAT FOR CITY OF BALTIMORE. The city of Baltimore has decided to add to its floating fire-fighting equipment a powerful fire boat and has commissioned Babcock & Penton, engineers and naval architects, Cleve- 'land and New York, to furnish de- signs and specifications and to super- intend construction. The outboard profile and deck plan of the approved design is presented herewith and THE Review hopes. to. present complete plans later. The dimensions decided upon afte: Length over all, 120 it; between perpendiculars, 109 ft. 6 in.; beam, molded, 28 ft.; depth, molded, 15 it; 'draught, 10 ft). The constric- tion will be of steel throughout, with no exterior wood work. As will be seen. the deck erections are limited to a boiler house with pilot house above. The fire pumps comprise two turbine driven centrifugal pumps which have a capacity of 4,500 gallons of water per minute against a pressure of 150 lb., or a combined capacity of 4500 gallons per minute at 300 Ib. pressure, operating in series at the same speed. The monitors and hose connections are arranged as follows: On deck immediately above the pumps will be fitted a turret with 12 3-in. hose valves, and from the top of this turret a connection is extended to. a monitor platform immediately above on which is located a 4-in. monitor nozzle. On deck forward is located another turret having four 3-in. hose valves and one 4-in. monitor nozzle above. This turret also has on the forward side four 6-in. hose valves for shore leads for connection to fire mains. An §8-in. branch from the forward line, which is 12-in. diameter, leads to the top of pilot house to a 145 third monitor. A fourth monitor is located about 30 ft. above the after deck on a lattice work mast with a platform at the top. The propelling engines are double simple non-con- densing, 20 x 20- in., driving a solid four-bladed steel propeller. 7 There are two surface condensers, one for each turbine, with independent circulating and air pumps. An atmos- pheric exhaust disabling pipe, common to both turbine sets, is also fitted. There are two boilers, set abreast, 12 it. 6 in. diameter, 11 ft. 6.1m leng, built for a working pressure of 170 lb., containing two removable type corrugated furnaces. The boilers will be fitted with mechanical heated draft and a branch from the propelling en- gine exhaust line is also led into the base of the stack above the air heat- ers to assist draft in getting away from' the dock. The coal bunker jis located immediately forward of the stoke hold. The shell plating is reinforced for- ward for working in ice. A steam steering gear of pilot-house type, is fitted and arranged to be worked by hand when necessary. A 10-kilowatt electric lighting plant is located in the engine room-with an 18-in. search light on pilot house. Proposals are now being received from ship builders and the contract will probably be placed at an early date. HEFFERNAN TO BUILD SHIP REPAIR PLANT AT SEATTLE. By the purchase of 18 acres of Seat- tle tide lands recently, J. T. Heffer- nan, president of the Heffernan En- - gine Works, and Heffernan Dry Dock Co., Seattle, becomes the owner of 35 acres in one tract having a deep water frontage of 3,600 ft. On this site Mr. Heffernan and his associates have an- nounced that they will erect a large shipbuilding and repair plant in the near future. The Heffernan Dry Dock Co.'s 6,000-ton floating dry dock is now in operation at the site of the new plant. The new construction con- templated consists of machine shops, foundry, ship fitting shops, joiner shops, etc., including all the necessary equipment for a ship repair plant, em- ploying from 1,000 to 1,200 men when working at full capacity. The Northern Navigation Co. have appointed Brock Batten as_ general agent at Port Arthur and Fort: Wil- liam. Mr. Batten succeeds R. Beau- mont, who has. occupied the po- sition since last September, CRO ete eae ON Rus Re aaa tae tea, Me