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Comparative trials of mineral lubricating oils with the addition of “Oildag.”
Jan., 1 9 1 5 . ]
PUBLICATIONS t~ECEIVED.
10 9
British Fire Prevention Committee, Red Book No. I9o, The Committee's Record for the Year 1913, the Committee's Christmas Warnings, Safeguards for School Entertainments, Inflammable Materials for Costumes and Decorations, Celluloid Dangers, Flannellete Dangers, Portable Chemical Fire Extinguishers, Self-contained Smoke Helmets, the Committee's Enquiry Office. 40 pages, illustrations, 8vo. London, British Fire Prevention Committee, 1914. Price, two shillings and six pence. New York Public Library, List of Works in the Library Relating to Oxy-acetylene Welding. 34 pages, 8vo. New York, 1914. U. S. Bureau of Mines: Bulletin 85, Analyses of Mine and Car Samples of Coal Collected in the Fiscal Years igII to I913, by Arno C. Fieldner, Howard I. Smith, Albert H. Fay, and Samuel Sanford. 444 pages. Monthly Statement of Coal-mlne Fatalities in the United States, September, 19t4, compiled by Albert H. Fay. 23 pages. Report of the Director of the Bureau for the Fiscal Year Ended June 30, I914. IOI pages. Technical Paper 76, Notes on the Sampling and Analysis of Coal, by Arno C. Fieldner. 61 pages, illustrations. Washington, Government Printing Office, I914. The Nation's Security. How About Our Army and Navy? Speech of Hon. Augustus P. Gardner, of Massachusetts, in the House of Representatives, October I6, 1914. 8 pages, 8vo. Washington, Government Printing Office, 1914. Judicial Recall. An address delivered at St. Louis, Mo., on September 23, I914, before the State Bar Association of Missouri, on "The Dilemma of the Judicial Recall," by Rome G. Brown, chairman of the American Bar Association Committee to Oppose Judicial Recall. 21 pages, 8vo. Washington, Government Printing Office, I914.
Comparative Trials of Mineral Lubricating Oils with the A d d i t i o n o f " Oildag." A. SAYTZEFF. (Zeitschr. Ver. Deutsch. Ing., lviii, I i 7 4 . ) - - " O i l d a g " is a preparation containing pure, finelydivided graphite mixed with lubricating oil. It is manufactured and sold by the International Acheson Graphite Company, of Niagara Falls. The oils used for these trials were sold under the trade names of "Dynamo Oil E " and "Etna Engine Oil." The method of Petroff was employed for the determination of the internal friction (u), while the oil-testing machine of Martens was used to determine the resistance to friction (u), and the frictional coefficient ( f ) . Full details of the tests, with tables and diagrams, are given. The practical results are summarized thus: ( t ) The value for the internal friction (u) remains fairly constant for the oils, whether treated with I. 5 per cent. oildag or not. (2) The mixture of I. 5 per cent. oildag with the mineral oils produces an almost perfect lubricating medium, and reduces the friction by 3° per cent. The mechanical friction of the thick "Etna".engine oil was diminished 7 per cent. by the addition of I. 5 per cent. oildag. (4) In all cases an addition of I per cent. to 2 per cent. of oildag to the oils produces a noticeable economy in oil consumption.
PUBLICATIONS t~ECEIVED.
10 9
British Fire Prevention Committee, Red Book No. I9o, The Committee's Record for the Year 1913, the Committee's Christmas Warnings, Safeguards for School Entertainments, Inflammable Materials for Costumes and Decorations, Celluloid Dangers, Flannellete Dangers, Portable Chemical Fire Extinguishers, Self-contained Smoke Helmets, the Committee's Enquiry Office. 40 pages, illustrations, 8vo. London, British Fire Prevention Committee, 1914. Price, two shillings and six pence. New York Public Library, List of Works in the Library Relating to Oxy-acetylene Welding. 34 pages, 8vo. New York, 1914. U. S. Bureau of Mines: Bulletin 85, Analyses of Mine and Car Samples of Coal Collected in the Fiscal Years igII to I913, by Arno C. Fieldner, Howard I. Smith, Albert H. Fay, and Samuel Sanford. 444 pages. Monthly Statement of Coal-mlne Fatalities in the United States, September, 19t4, compiled by Albert H. Fay. 23 pages. Report of the Director of the Bureau for the Fiscal Year Ended June 30, I914. IOI pages. Technical Paper 76, Notes on the Sampling and Analysis of Coal, by Arno C. Fieldner. 61 pages, illustrations. Washington, Government Printing Office, I914. The Nation's Security. How About Our Army and Navy? Speech of Hon. Augustus P. Gardner, of Massachusetts, in the House of Representatives, October I6, 1914. 8 pages, 8vo. Washington, Government Printing Office, 1914. Judicial Recall. An address delivered at St. Louis, Mo., on September 23, I914, before the State Bar Association of Missouri, on "The Dilemma of the Judicial Recall," by Rome G. Brown, chairman of the American Bar Association Committee to Oppose Judicial Recall. 21 pages, 8vo. Washington, Government Printing Office, I914.
Comparative Trials of Mineral Lubricating Oils with the A d d i t i o n o f " Oildag." A. SAYTZEFF. (Zeitschr. Ver. Deutsch. Ing., lviii, I i 7 4 . ) - - " O i l d a g " is a preparation containing pure, finelydivided graphite mixed with lubricating oil. It is manufactured and sold by the International Acheson Graphite Company, of Niagara Falls. The oils used for these trials were sold under the trade names of "Dynamo Oil E " and "Etna Engine Oil." The method of Petroff was employed for the determination of the internal friction (u), while the oil-testing machine of Martens was used to determine the resistance to friction (u), and the frictional coefficient ( f ) . Full details of the tests, with tables and diagrams, are given. The practical results are summarized thus: ( t ) The value for the internal friction (u) remains fairly constant for the oils, whether treated with I. 5 per cent. oildag or not. (2) The mixture of I. 5 per cent. oildag with the mineral oils produces an almost perfect lubricating medium, and reduces the friction by 3° per cent. The mechanical friction of the thick "Etna".engine oil was diminished 7 per cent. by the addition of I. 5 per cent. oildag. (4) In all cases an addition of I per cent. to 2 per cent. of oildag to the oils produces a noticeable economy in oil consumption.