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Jan 1, 1969

PRESIDENT SAMUEL A TAYLOR, District 3 PITTSBURGH, PA PAST PRESIDENTS WILLIAM KELLY, District 5 IRON MOUNTAIN, MICH J V W. REYNDERS, District 0 NEW YORK, N Y FIRST VICE-PRESIDENT E DEGOLYER, NEW YORK, N Y TREASURER CHARLES F RAND. . . NEW YORK, N Y

Jan 1, 1923

PRESIDENT AND DIRECTOR CHESTER A. FULTON NEW YORK, N. Y. PAST PRESIDENTS AND DIRECTORS EUCENE MCAULIFFE OMAHA, NEBR. C. H. MATHEWSON NEW HAVEN, CONN. TREASURER AND DIRECTOR ANDREW FLETCHER NEW, YORK, N. Y.

Jan 1, 1944

Jan 1, 1935

Jan 1, 1935

Jan 1, 1935

Jan 1, 1935

Jan 1, 1960

Map

Jan 1, 1937

Established as a Division November 17, 1948 R Schuhmann, Jr, Chairman A E Lee, Jr, Past Chairman R C Cole, Chairman-Elect H W St Clair, VIce-Chairman, '61 , Vice-Chairman, '62 Paul Queneau, Vice-Chairman, '63 T D Jones, Treasurer R W Shearman, Secretary AIME, 29 West 39th Street New York 18, N Y

Jan 1, 1960

Jan 1, 1935

ALMOST all the hazards productive of accidents are present in churn drill operation-exposed electrical cables, open machinery, moving parts located overhead, exposure to weather, and movement of heavy machinery-all are part of the job. But, a check list of danger spots and full use of countermeasures will produce maximum safety here, as on any other operation.

Jan 8, 1953

Organization Place Date International Mining Convention (Auspices, Van- 1919 couver Chamber of Mines) Vancouver, B. C. Jan. 8-10 American Institute of Consulting Engineers, Inc... New York, N. Y. Jan. 13 American Society of Civil Engineers New York, N. Y. Jan. 15-16 Institute of Chemical Engineers Chicago, 111. Jan. 15-18 American Wood Preservers Association St. Louis, Mo. Jan. 28-30 American Society of Heating and Ventilating Engineers New York, N. Y. Jan. 28-30 Automotive Engineers New York, N. Y. Feb. 4-6

Jan 1, 1919

By Zay Jeffries

J. W. RICHARDS, South Bethlehem, Pa.-I think that the diagrammatic results can be much more clearly set forth if they are plotted as follows: The present diagram, shown on page 1227 of Mr. Jeffries' paper, Logarithm of Per cent of Maximum Wattage Used plots the variation of wattage with temperature in a very inconvenient and uncertain-way. If, however, you plot as abscissas the logarithms of the wattage, you get very nearly a straight line, so that you can interpolate the values with much greater accuracy than you can by using

Jan 4, 1917

[Year of Election to Honorary Membership 1876. PROF. RICHARD AKERMAN Stockholm, Sweden. 1913. DR. FRANK DAWSON ADAMS Montreal, Canada. 1920. HENRY STURGIS DRINKER Bethlehem, Pa. 1888. PROF. HATON DE LA GOUPILLIERE Paris, France. 1906. SIR ROBERT A. HADFIELD London, England. 1917. HERBERT HOOVER Stanford University, Cal. 1919. ROBERT W. HUNT Chicago, 111. 1915. JAMES FURMAN KEMP New York, N. Y. 1905. PROF. HENRI Louis LE CHATELIER Paris, France. 1913. EZEQUIEL ORDOENEZ Mexico City, Mexico. 1909. ALEXANDRE POURCEL Paris, France. 1911. ROBERT H. RICHARDS Boston, Mass. 1906. JOHN E. STEAD Middlesbrough, England. 1902. PROF. DIMITRY CONSTANTIN TSCHERNOFF Petrograd, Russia. 1907. CHARLES D. WALCOTT Washington, D. C.] [ ]

Jan 1, 1925

By L. Ormsby, H. Lines

Drilling and blasting practices in the Morenci open pit have undergone considerable modification in recent years. Changes in the character of the ground being mined, modifications of working conditions, and continuous perimentation have been the contributing factors.

Jan 5, 1950

By John F. Blandy

THE map on Plate I illustrates a part of the works of the Red Bank Mining Company, on the Upper Freeport seam of coal, in Armstrong County, Pennsylvania. The contour lines give a careful representation of the conformation of the surface, showing also the line of outcrop of the seam, and the gangways of the mines are shown by the black lines. Upon assuming charge of the works in January last, I found that the first and greatest difficulty lay in the great uncertainty of the

Jan 1, 1876

By R. W. Raymond

Some months ago I heard from a party of returned tourists an amusing story of a Chinese laundryman in the National Park who had included in his cabin a hot spring, of which he was accustomed to avail himself in his business, and who, on one occasion, having thrown a lot of linen into this spring to soak overnight, had added a piece of soap to facilitate the process, and had been considerably surprised when, stimulated by this soap, the spring had suddenly become a geyser and wrecked his establishment. The story went on to say that the practice of "soaping" geysers to make them, active had become general, but had been forbidden by the authorities.

Jan 1, 1889

Jan 1, 1936