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440 THE WHEN THE SHIP SAGGED IT CAUSED MANY OF HER FRAMES TO BUCKLE sediment in fuel oil tends to clog the burners, reducing their capacity and necessitating frequent cleaning. This strainer is also suitable for straining the water supply from such sources as rivers and lakes to prevent woods, sticks, marine plants and smal! fish from entering the "pipe lines. The strainer consists of a _ cast iron body containing two perforated Repair Victim of Halifax EPAIRS on the steamer, Curaca, R completed by the Robin's Dry ' Dock & Repair Co., New York, represent a unique experiment in marine construction. The Curaca was one of the English boats of the Grace line. She fell a victim of the Halifax disaster in December, 1917, when the munitions steamer, Mont Brianc, loaded with TNT exploded and caused extensive damage to the boats in the harbor and to the city itself. The Curaca was bound for Belgium with a relief cargo of wheat and horses. She lay alongside a wharf directly abreast of the munitions steamer, being not more than 100 feet distant when the explosion occurred. The CuracA was almost completely submerged. Her superstructure was blown away and she was buckled at about midlength to such an extent that when refloated the draft at the buckle was 16 feet 2 inches, while the draft at bow was 7 feet.and at stern 9 feet 8 inches, showing that the vessel was forced up 9 feet 2 inches from the base line at bow while the stern was forced up 6 feet 6 inches. The captain was successful in pulling her further up toward the beach before she sank com- steel or brass baskets. The valve arrangement permits the complete re- moval and cleaning of either basket while the other remains in service. In operation, the oil or other liquid enters the inlet connection of the strainer and passes into whichever basket is in service. The solid matter remains in the basket, the clean liquid passing through the perforations and pletely. This simplified salvage work. In this condition the vessel was raised, temporarily repaired and brought to New York under her own steam. The buckling had been caused: by the prow MARINE REVIEW September, 199 thence out of the strainer. All cast iron sections are cylindrical, result. ing in maximum strength. The valve mechanism is said to be simple and the valves are easily reground. Electric Drive for New Battleship The main electric propulsion machin- ery of the U. S. S. TENNESSEE, which" is being supplied by the Westinghouse Electric & Mfg. Co., will consist of four 8375-horsepower motors, each di- rectly connected to a propeller, and two 20,000-horsepower turbogenerators. Speed control is obtained by varying the speed of the turbines and by use of two windings, one for low speed and the other for high speed, on each motor, For ship speeds of from 9 to 15 knots, the motors are operated on their low- speed windings and one turbogenerator is used. For speeds of from 15 to 17 knots, the motors are operated on their high-speed windings by means of one turbogenerator and for speeds of from 17 to 21 knots, the motors are oper- ated on their high-speed windings and both turbogenerators are used. The steam consumption of the turbo- generators ranges from 16 pounds of steam per. shaft-horsepower hour for 9 knots to 11.7 pounds for 19% knots, and 11.9 pounds for 21 knots. Explosion resting on the beach and the stern upon a sandbar. The work of straightening and repairing commenced on April 25, 1919. The big problem presented was to _restore the vessel to an even keel. On CUTTING THE SIDE OF THE VESSEL AT THE POINT WHERE SHE WAS BUCKLED ; ]