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July, 1920 Welds Propeller Strut The accompanying illustration shows q thermit weld made on the starboard propeller strut or the United | States destroyer MacDovcat, at the Brooklyn navy yard. Extremely accurate allow- ance had to be made for contraction of the weld. The cast steel lower leg of the strut had been forced and elongated outward from the side of the ship, so that the propeller shaft bearing y,-inch out of alignment. this defect, a small section was cut out of the lower leg of the strut in order to shorten it the required amount. The two sections of the lower leg were then reunited by thermit welding. The sec- tion welded was 3 inches thick at its thickest part and 22 inches wide. It required 200 pounds of thermit. New Pacific Ship Firm Incorporation of the Los' Angeles Steamship Co. \with a capitalization of $5,000,000, to own and operate the was To remedy steamers YALE and Harvard between Los Angeles and San Francisco, has been completed. The steamers were purchased from the government at a cost of $1,755,000. They are expected [0 aitive on the Pacific codst from Philadelphia July 1. Contracts for remodeling and_ refit- ting the vessels on their arrival on the west coast have been awarded tc the Ralph J. Chandler Shipbuilding Co. and the Los Angeles Shipbuilding & Drydock Co. Specifications call for general overhauling and _ reinforcemuiit of the hulls and the installation ot new machinery. These with the elabora- tion of passenger accommodations are expected to cost $1,500,000. The com- pany has applied for the allocation of four of the new 14,000-ton freight and passenger vessels from the United States shipping board, and expects to enter the transpacific trade if these are secured. Officers of the new corporation are Fred L. Baker, president; M. H. Sher- man, vice president; E. M. Leaf, secre- tary; M. H. Whittier, treasurer. Other directors are: Harry Chandler, E. L. Doheny and Ralph J, Chandler. Book Review Simple Rules and Problems i is in Navi- eee by Charles H. Cugle; cloth; 305 oon 6 x 9 inches; published by E. P. oe & Co. and furnished by THE MARINE Review for $4.00. et is a master mariner who " i€aving the sea conducted a navi- noe school in New Orleans and be pene contained in the pres- -- aN now in its third edition, Mm instructing pupils. The THE MARINE REVIEW Present edition was revised and cor- rected by Bradley Jones, instructor of navigation at the Massachusetts In- stitute of Technology, Boston. Mr. Cugle has .met. ith success aS an instructor and through long Fractice he has gained a knowledge of the stumbling in the way of the average his attempt to master the navigation. In the present volume, where technical terms predominate, they are explained in stch a4 way that the average' layman can com- prehend them. The book first takes up international and inland rules of the road followed by a chapter devoted to useful defi- nitions and other information. These blocks student in science of thorough. 425 To Build Oil Barges J. Samuel White & Co.,.Ltdy Bast Cowes, Isle of Wight, have secured a contract to build and equip three steel single-screw motor barges, of 500 tons capacity each, for carrying ou fuel in butk. «These vessele will be of the single-deck type, with up- right stem and elliptical stern and are to have one mast and derrick and hand winch each. The machinery is to be placed aft and will consist of a 2-cycle Kromhout oil engine and accessories. Two pumps will be pro- vided for the cargo, each with a ca- pacity of 100 tons per hour. The oil will be carried in three cargo tanks divided by a longitudinal bulk- WELDED PROPELLER STRUT ON THE U. S. DESTROYER MACDOUGAL are arranged alphabetically for ready reference. Next, a section is devoted to the arithmetic of navigation in which logarithms as well as simple problems are fully explained. Dead reckoning, mercator's sailing, middle latitude sailing, and numerous other navigation problems are next treated. Two charts are included which ex- plain the method followed by the author:in plotting one observation of the sun or a star on a mercator chart. In the present edition, Bradley Jones points out that the problems have been carried out with a fine degree of accuracy and that the in- terpolations used are sufficient to sat- isfy the strictest local inspector or the most rigid exponent of sea prac- tice. The board of commissioners of the port of New Orleans has assessed 10 cents a ton tollage on all freight passing over the wharves. head into six oil-tight compartments. The vessels will be built for river and harbor service. Accommodation for five men will be provided in two rooms in the forward part of each vessel, with cooking range and food lockers. Seabury & de Zafra, Inc., New York. have been appointed by Manuel Angel Fernandez & Cia., Vera Cruz, Mexico, -as their consulting naval architects and marine engineers in connection with their rapidly developing line of freight vessels operating along the east coast of Mexico in conjunction with the Ward line. One of the longest passages on record from Australia was made by the 4-mast schooner Minnie A. Caine, which ar- rived on Puget sound from Adelaide, 120 days out. The vessel was delayed by calms and contrary weather and anxiety was expressed as to her safety.