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Purification of Oil (Continued from Page 61) trouble from this source. Until very recently. the smaller marine units have not generally been able to enjoy the protection of cen- trifugal lubricating oil purifiers. Al- though smaller centrifugals have been available they have not been de- signed specifically to meet the needs of diesel operation. The Sharples Speciality Co. has spent considerable time and thought in the development of a centrifuge adaptable to this service. It may be attached directly to the engine, has a_ self-contained motor drive and is constructed to operate continuously with a minimum of care and attention. It is sturdily constructed and easily cleaned. This machine is directly in line with the present trend toward the universal use of oil purifiers so that protection may be secured for internal combus- tion engines of any size whatever at a cost commensurate with the investment in the engine itself. x Need Diesel Vessels (Continued from Page 13) which is, that when completed these vessels will have a deadweight of about 10,500 tons and will make a speed of 13 to 14 knots, making them the equal of the best merchant ves- sels afloat today. Private building of diesel engine ships in the United States has not taken on as it has abroad. A care- ful analysis of all new shipbuilding in the United States during the last calender year showed that diesel as primary power was used in 47.9 per cent of all steel merchant vessels over 100 gross tons or 100 feet in length in some stage of construction during that period. This percentage approaching that for diesel engine vessels under construction the world over, does not however, tell the whole story. Many of the vessels in which diesel engines were installed in the United States were of the smaller sound bays and river craft and spe- cial craft. Eliminating these the pro- portion of diesel engine vessels would drop to the low figure of about 13 per cent. There was of course in ad- dition to new building a number of private conversions from steam to diesel. The plain fact is that the diesel en- gine has not so far made any head- way to speak of for use as propulsive power in American domestic vesséls and our privately owned overseas merchant marine is extremely limited and is not being added to by building in American yards. Though our do- mestic shipping business is extensive and is constantly growing the num- ber of additions to this fleet is limited. The increased use of the diesel engine for American privately owned ships will have to depend, first, on making the private American op- erator engaged in domestic shipping realize that by adopting the diesel engine he can lower his operating cost to such a point that consider- ing the initial cost he will receive a greater return on his investment; sec- ond, in the possibility to building up a privately owned American merchant marine for the overseas trade to car- ry a fair share of our own commerce. In this field the American operator meeting foreign competition will be compelled as a matter of self-preser- vation to adopt the most efficient type of propulsion machinery. Foreign owners and their technical advisors have faith in the degree of mechanical perfection of the diesel engine in its present state of develop- ment and in the commercial superi- ority of vessels so engined. That such faith is not limited to a certain class of vessels only, such as long voyage Se TT arr rrr TT TTMTETIMSTUTT TTT ITTCUTTLTRISTTULIRULUURO OOOO ALON RAOLTODICDUUIROUUCUUCUULUUUCATUCAUOIUUNUUNO nT AOODOUNT OOOO TUTUCNOOOUTOODOOPTUOUTOUOTTOUTTTCUONOUUUUNTHOOTOUNULNUTCUUAA CUTE UCU LORCA ULULUAOUU DL OUCAOSLLUUCOLULOCNTLCOLO De = NavalArchitects Meet in New York Nov. 10-11 | SU) UUNUMUUDELUUUEENSAUUETEUA CUESTA ETAT (eo) HE Society of Naval Architects and Marine Engineers will hold the thirty-fifth general meeting of the society at the Engineering Societies building, Twenty-nine West Thirty-ninth _ street, New York city, Thursday and Friday, Nov. 10 and 11, 1927. Fourteen technical papers will be pre- sented at the professional sessions which will begin each day at 10 a. m. The council of the society will meet at 3 p. m. Nov. 9 in the board room on the fifteenth floor of the Engineering Societies building, through the courtesy of the American Society of Civil Engineers. Following a long established custom the banquet will be held at 7:30 p. m. on Friday, Nov. 11, in the grand ballroom of the Waldorf Astoria hotel. Im- mediately preceding the banquet there will be a reception beginning at 6:30 p. m. The titles of the papers, their authors, and the order in which they are to be delivered follows: THURSDAY, Nov. 10, 1927 1. “Car Float Strength and Deflection,” by Prof. Evers Burtner, member, and Richard H. Tingey, vis- itor. 2. “The Design of Superstructures for Large Passenger Ships,” by Carl E. Petersen, member, and Lorentz Hansen, visitor. 3. “The Wampanoag, the Fastest Ship in the World, 1868,” by James Swan, member. 4.. “The Submarine of Today,” by Lawrence Y. Spear, member. 5. “Model Tests with Adjustable Blade Pro- pellers,’ by Capt. William McEntee, C. C., U. S. N., council member. 6. “Tank Steamer Fires and Explosions,” by Robert L. Hague, member. 7. “What is Naval Aviation Doing,” by Capt. Emory S. Land, C. C., U. S. N., member. FRIDAY, Nov. 11, 1927 8. “Test of Pulverized Coal as Applied to Scotch Marine Boilers,” by Carl J. Jefferson, member, and Commander Joseph S. Evans, U. S. N., visitor. 9. “Pulverized Coal Tests of a Marine Water Tube Boiler,’ by Thomas B. Stillman, member. 10. “Test of a Two-Cycle Double Acting Marine Diesel Engine,” by Ernest Nibbs and Stephen A. Gardner, members. 11. “Diesel Engines for the Navy,” by Edward C. Magdeburger, visitor. 12. “The Engines of the U. S. Shipping Board Diesel Conversion Program,” by Capt. Richard D. Gatewood, C. C., U. S. N., member. 13. “Modern Trend of the Diesel Engine with Respect to Low Weight per Horsepower, High Rev- olutions Per Minutes and High Mean Effective Pressure,” by Otis D. Treiber, member. 14. “Vibration and Engine Balance in Diesel Ships,” by Prof. Frank M. Lewis, member. ET) CAAA fT MARINE REVIEW—November, 1927 PTUUTHTEUTU TEU UTTAR ANTAAUEQONDTUDNASIOONNSTAUSENSUAANESAU UA EGGSEUSOGDTAD EDAD TANNA AOEASUOAEDGAH TETSU EASTON TANASE PS = Te mer,