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i See eC Te eee ee Se ee eo ES NT a Te July, 1919 pointer slots, 10, are provided with screws, 20. By this means, the dial plate is readily clamped in the de- sired position. In operation, after the device is installed aboard the vessel, the pendu- lum is allowed to swing freely as the ship moves. '. The amount of the movement is registered by the pointer, 14, over the scales, 6 and Jo. When it is desired accurately to register the motion of the vessel at any time, the lock nut, 77, is fastened to hold the pendulum in place when it has swung to an extreme position. By this means, it is pointed out, the scales may be read at leisure.' Fuel for Diesel Engines _A writer in Journal ftir Gasbeleuch- tung, discusses a method of filtering coal tar for use in diesel engines which is said to be both simple and effective. The tar is pumped into a receptacle of about 3 cubic meters capacity. In this holder it is heated up to 60 de- erees Cent., for 4 hours, and _ then left to stand for 10 hours to allow the pitch and. other impurities to settle down. Then one-third of the contents of the holder is run from the top and forced through three filters, the latter being heated to 40 degrees Cent. The product is then conveyed to the holder for the purified material, from which it is led directly to the engines. The tar is warmed up to 40 degrees Cent., before being introduced into the en- gine. This is effected by means of a gas heating device below the tar pipe. To obtain the best results, it. is pointed out that the piston of the en- gine should be cleaned once in four months. The cylinder walls and piston rings are, however, no more liable to be clogged than when crude heavy oil is used. Concrete Anchors The device shown in the accompany- ing illustration is a concrete anchor recently developed by the Inter-Ocean CONCRETE MOORING ANCHOR . WEIGHING - 8000 POUNDS Barge & Transport Co., Seattle. The company makes these anchors in vari- ous sizes from 1 to 8000 pounds. The THE MARINE REVIEW anchor illustrated is the 8000-pound type. It is 8 feet 2 inches in height. These anchors are strongly reinforced with steel bars and are equipped with a mooring ring at the top. They are cast in wooden molds. They are ex- tensively used by Alaska fishermen for floating fish traps and buoys, but are designed for any purpose where a sub- stantial mooring anchor is desired. 1] I) Thrust Bearing Data The substitution of a single collar for a multicollar thrust bearing on the average merchant ship. or trans-- port would result in the saving of about 0.5 per cent, according to H.- G. Reist in the General Electric Re- view, of the total power, coal and. size of boilers. Thus the conservation. of fuel would be material, and economy- would be effected in first cost and increased cargo space would also be obtained. LOWERING A COMPLETE BOILER IN PLACE IN A GOVERNMENT HARBOR TUG The imperfect fitting and adjustment of multicollar bearings renders it im- possible to maintain oil films between all of the bearing surfaces, and the losses are correspondingly great. Cal- culations for two thrust bearings for 50,- 000 pounds thrust mounted on shafts running at 90 revolutions per minute show that the losses for an 8-collar bearing are 11.5 horsepower as com- pared with 1 horsepower for a single collar bearing. --E Ships Boilers Complete Transporting marine boilers com- pletely assembled, including furnace linings, is a comparatively new de- parture in marine construction work. This method of shipping boilers was successfully accomplished by the Bridgeport Boiler Works, Bridge- port, Conn., in filling a government 353 order for 12 marine boilers of the modified watertube type, a smaller unit of the Emergency Fleet stand- ard _ boiler. These boilers are rated at 350- horsepower and built to operate safely at 150 pounds steam pressure. Each has 261 three-inch tubes and 9 four- inch tubes with a grate surface of STEEL LADLE HOOK MADE FROM SCRAP » SHIP PLATE : 50 square feet and a heating surface. of 1800 square feet. They were: built especially for the 88-foot gov- ernment -harbor tugs. Shipment by water from Bridge- port to. City Islands Nv. Y¥,, wasicar- ried out by loading the boilers: on harbor. tugs. On arrival at: Civ Island, the boilers were then lowered: directly into place in the holds of the waiting government tugs. The boilers as shipped measured 13 feet long by 13 feet '6 inches high and 8 feet 3 inches wide, weighing ap- proximately 23 tons each. : The linings were laid up with a high temperature cement, furnished by the Quigley Furnace Specialties: Co., New York. Success in shipping by water prompted the producers to ship some by rail. When going for- ward by rail, however, it was neces- sary to ship the settings and the tubes and boilers separately. Three boilers went to City Island, three to Clayton, N. Y., three to Camden, N. J.. and three to Newburgh, N. Y. The Camden and Clayton shipments were forwarded by rail. New Use for Scrap Plate Odd pieces of scrap steel plate which accumulate in steel shipyards' represent a substantial loss annually as their monetary value as scrap ma- terial is comparatively low.. The ac- companying illustration shows how scrap plate was recently utilized in a shipyard for making large built-up hooks. . These hooks are used in steel mills for handling heavy ladles of molten metal and, it is said, for all practical purposes they are as efficient as hooks made from solid material in the regular way... The hook shown is 8 feet long and is built up from 10 plates. Four inner full-length plates are %%4-inch material, reinforced by two full-length plates made from %-inch stock. Two half-length plates, one on either side,