The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

THE MARINE RECORD. CL SOME INTERESTING EXPERIMENTS. _ At the sixth annual or 32nd meeting of the American Society of Mechanical Engineers, held at the rooms of the society in New York city, Mr. Albert Kingsbury, Durham, N. H., had a paper on “Experiments on the Friction of Screws.’’ The tests were made by the aid of a specially designed machine, built at the New Hamp- shire College shops. It now forms a part of the labora- tory equipment of the college. The author did not consider that the tests showed that any one of the metals developed less friction than any of the others, but the tests are specially interesting because of the great lessening of friction by means of graphite, as will be shown by the following: Lubricator. Minimum. Maximum. Mean. Bard: Oils: < opie Se a ae RDO ease 1s 11 “Heavy Machinery, 7 Oil YMineral).2.8 Th pane eg A RS | Sepa 143 Heavy Machinery, Oil and Graphite, (Equal Volumns). .03........... Glos i. ss. eee 07 Mr. Kingsbury was complimented by Professor Thurston for the work he had accomplished. Person- ally, Professor Thurston had found that sperm oil was better than lard oil for reducing friction in such in- stances. He trusted that Mr. Kingsbury would continue his investigations. Mr. Kingsbury felt gratified at the manner in which his paper had been discussed, and in reply to a question that had been asked, he said that the graphite used was from the Joseph Dixon Crucible Co., Jersey City, N. J. He said he did not intend anything in the way of an ad- vertisement. He also added that he had tried to purify the graphite, but there was no gain. In order to satis- factorily employ the graphite the fit must be loose. Some years ago, when Professor Thurston was con- nected with Stevens’ Institute, he made a series of ex- periments to determine with scientific accuracy the value of graphite as a lubricant. He found that under the same number of pounds pressure, and traveling at the same rate of speed, the bearings lubricated with Dixon’s graphite, mixed with enough water to distribute it over the bearings, did nearly three times more work than the best quality of winter sperm oil. He also found that when 15 per cent, by weight, of graphite was added to the best quality of lubricating grease, he was able to run the bearings nearly six times longer, at the same high rate of speed, than when the bearings were lubri- cated with the same grease, without the addition of graphite. Furthermore, when the graphite was used there was no cutting and the bearings were in perfect condition. Little, if any, of the commercial graphitein the mar- ket is fit for lubricating purposes, and bearings have been so frequently cut or ruined by its use, that there has beena very strong prejudice against its adoption by master mechanicsand superintendents having charge of expensive machinery. It is safe to say, however, that when graphite is properly prepared, it will notonly reduce friction much better than any oil or grease alone, but, furthermore, will perceptibly reduce the cost of lubrication. Se In the United States District Court at Milwaukee Judge Seaman sustained the report of Commissioner Kurtz in the matter of division of damages growing out of the sinking of the steamer Thomas H. Smith by the steamer Arthur Orr, off Racine north point several sea sonsago. According to the report» of Commissioner Kurtz the owners of the steamer Orr must-pay to the Leatham & Smith Towing and Wrecking Co. $10,000 damages with interest from Novy. 11, 1893. PROPOSALS. U. ‘s. ENGINEEE OFFICE, 366 Mil- waukee street, Milwaukee, Wis., Oct. 27, - 1896. Sealed proposals for: Kewaunee Harbor, Wis., 425 feet pile pier exten- sion; Manitowoc Harbor, Wis., 500 feet crib pier extension; South Milwaukee Harbor, Wis., 180 feet pile pier exten- - sion; Racine Harbor, Wis., 250 feet crib pier extension; Kenosha Harbor, Wis., 250 feet crib pier extension; will be re- ceived here until12 o’clock noon Novem- ber 27, 1896, and then publicly opened. Information furnished on application, GEORGE A. ZINN, Capt. Engrs. 45-47 QUEEN CITY Hydraulic Steerer. The best and most powerful Steerer for Tugs, Steamers, Etc. MANUFACTURED BY QUEEN CITY ENGINEERING 60, BUFFALO, N.Y. . Write for Prices and References. TRADE Mark. TOBIN: BRONZE, Tensile Strength, one inch cold drawn rod, upwards of Torsional Strength equal to the best Machinery Steel. be forged at cherry red heat. Piston Rods, Yacht Shafting, Etc. Non-Connieal in sea water. ,000 lbs. per square inch. Can Round, Square and Hexagon Bars for Bolt Forgings, Pump Spring Wire, Rolled Sheets and Plates for Pump Linings and Condenser Tube Sheets, Centerboards, Fin Keels and Rudders, Ansonia Brass and Copper Co,, SOLE MANUFACTURERS, SEND FOR PAMPHLET, 19-21 CLIFF ST... NEW YORK. GRAHAM’S RAPID FUELING DOCKS, No interference from Passenger or Car Ferry Lines. BEST STEAM COAL lways on hand. Wide stretch of river and plenty of water at dock. POCKETS | AND CHUTES arranged for various types of vessels, allowing QUICK DISPATCH day or.night. JAMES GRAHAM, DETROIT. DETROIT RIVER, FOOT 2ist STREET. Full supply of THE CHASE MACHINE MACHINISTS, ENGINEERS AND BLACKSMITHS, MANUFACTURERS OF Land & Marine Engines & Steam Pumps, SOLE OWNERS AND MANUFACTURERS OF THE CHASE AUTOMATIC FOG WHISTLE MACHINE, IN USE ON NEARLY ALL LAKE STEAMERS, Agents for. AsBEstos STEAM, BorLeR AND PripE CovERING. {11 Elm Street, CLEVELAND, 6, Telephone 994, PINTSGH GAS LIGHTED BUOYS. Adopted by the English, German, French, Russian, Italian and United States Light-House Departments COMPANY, NEW YORK, PHILADELPHIA. BOSTON, for channel and harbor lighting; over 500 gas buoys and gas beacons in service. BURN CONTINUOUSLY from 80 to 365 days and ni BRILLIANT AND STEADY ILLUMINATION. ECONOMICAL AND RELIABLE IN OPERATION. _-Sontroliee Ser ely. CAR HEATING AND LIGHTING CO., 160 Broadway, NEW YORK CITY. hts. without attention, and can be seeén a distance of six miles. AND GUARANTY BUILDING, DOUBLE-ENDER PLEASURE BOAT. BALTIMORE, SAN FRANCISCO, NEW ORLEANS. JONSON & Higgins __ Average Adjusters... Fire s° Marine Insurance, SPECIAL FACILITIES FOR PLACING MARINE LINES. BUFFALO, N. Y, HAVE NO RIVAL! in appearance, durability, and staunchness MULLINS’ METAL BOATS are superior in“every way. Need no repairs. Low in cost. Send for catalogue. W. H. MULLINS, 252 Depot St., Salem, 0 For sale by A. G. Spautpine & Bros. ‘olhickee. Joun P. Burkuarp, St. Paul, Minn., Srumons Harpwake Co., St. L eet, Mo., H. €. Squires & Fors, New York. N. Y,, Saxs’& Go.. ashing- on For Stationary, Portable, Traction Engines, Tugboats, &c. Thoroughly Reliable—Perfectly Automatic. JENKINS BROS., = Selling Agents, NEW YORK, BOSTON, PHILA., CHICAGO,