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By M. Van Hecke, Y. Berube, L. M. de Smecht

Nitrogen solubilities in water at 100, 200, and 400 psi, in the temperature range 100 to 175C, were determined using an automated system involving flash evaporation and gas chromatography. Rates of gas transfer into a standard laboratory auto-clave were measured by the same technique. The rates at which a gas can dissolve into such a reactor were found to be close to the rates of oxygen consumption observed during the oxidation of several mineral sulfides, indicating that gas transfer might be a rate-limiting step in autoclave leaching.

Jan 1, 1977

On June 25, Herbert C. Hoover and General Pershing were honored by Oxford University with the degree of Doctor of Civil Law. The ceremony was held in the Sheldonian Theater. It was the culminating feature of the annual L Ecnaenia, or commemoration exercises. Both General Pershing and Mr. Hoover were greeted-heartily when the group filed into the theater, the great audience rising as the distinguished visitors entered and proceeded to their .places on the rostrum. Others upon whom. the degree was conferred were Baron Makino, head of the Japanese Peace Conference delegation; Marshal Joffre of France, Vice Admiral Sir David Beatty, Field Marshal Sir Douglas Haig, Major Gen. Sir Henry Hughes Wilson, Chief of the British Imperial Staff, and' Vice 'Admiral' Sir Rosslyn Wemyss, First Sea Lord. Former Premier Orlando, of Italy, and Premier Ignace Paderewski, of Poland, received the degree by proxy.

Jan 8, 1919

By Cleveland Meeting

Jan 1, 1945

By L. C. Noakes

In 1947, only a year after its own establishment, the Australian Bureau of Mineral Resources, Geology and Geophysics formed a Mineral Economics Section. Originally, this Section consisted of a mineral economist, four geologists and three auxiliary employees. Then, in 1954, it was reorganized into a professional body of six members, all mineral economists, one of whom was the chief mineral economist. At this time, a mining statistical officer from the Bureau of Census and Statistics was attached to the Section to bring about a closer liaison between these two agencies. The addition of another mineral economist in 1961 brought the Section's professional staff to its present strength of seven. In recent years, the Mineral Economics Section has gained considerable support by becoming part of the Mineral Resources Branch of the Bureau of Mineral Resources. This Branch, which has the general role of monitoring the performance of the mineral industry in Australia, has two other specialized sections- Mining Engineering and Petroleum Technology-which bolster and complement the Mineral Economics Section.

Jan 1, 1970

LIST OF THE MEETINGS OF THE INSTITUTE AND THEIR LOCALITIES FROM ITS ORGANIZATION Transactions Number Place Date Vol Page I Wilkes-Barre, Pa * May, 1871 I 3 II Bethlehem, Pa August, 1871 I 10 III Troy, N Y November, 1871 I 13 IV Philadelphia, Pa February, 1872 I 17 V New York, N Y * May, 1872 I 20 VI Pittsburg, Pa October, 1872 I 25 VII Boston, Mass February, 1873 I 28 VIII Philadelphia, Pa * May, 1873 II 3 IX Easton, Pa October, 1873 II 7 X New York, N Y February, 1874 II 11 XI St Louis, Mo * May, 1874 III 3 XII Hazleton, Pa October, 1874 III 8 XIII New Haven, Conn February, 1875 III 15 XIV Dover, N J * May, 1875 IV 3 XV Cleveland, 0 October, 1875 IV 9 XVI Washington, D C February, 1876 IV 8 XVII Philadelphia, Pat June, 1876, V XVIII Philadelphia, Pa October, 1876 V 9 XIX New York, N Y February, 1877 v 27 XX Wilkes-Barre, Pa * May, 1877 vi 3 XXI Amenia, N Y October, 1877 vi 10

Jan 1, 1917

By A. H. Jones, J Leasia, S. J. Green, R. D. Perkins

Previously, two groups have conducted studies in order to define the influences of the intermediate principal stress. Mogi studied biaxial compression on prisms of Dunham dolomite and concluded that the intermediate principal stress should be taken into account. His study showed that failure strength increases with increasing [02], but less than the strength increase with increasing confining pressure. Handin, Heard, and Mogouirk's study on cylinders of Solenhofen limestone in torsion also found that the strength depends on the magnitude of [02]. More recent investigations by Mogi varying all three principal stresses independently and by Wawersik varying two of the principal stresses independently provide more detailed data confirming the effect of [02] on failure. All these tests were at low strain rates, and only the work of Wawersik reports measurement of all strains. The investigation here measures axial and transverse strains and included uniaxial and triaxial stress compression tests and biaxial stress tests using tubular samples (axial load and internal or external fluid pressure) at strain rates to 103/sec to provide the stress-strain response and to define the maximum stress or yield locus of Solenhofen limestone and Westerly granite.

Jan 1, 1971

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