Search Documents

By Carl A. Zapffee

FOR a number of years a puzzling phenomenon of brittleness in Class II ferritic stainless steels, developing in the temperature range near 475C, has received increasing attention, but its nature remains essentially unknown. During an investigation of the fractographic structures in stainless steels, conducted in the author's laboratory the past several years, principally under sponsorship of the Office of Naval Research, some observations of a new kind were found for "475 °C embrittlement." While the details of the study cannot be given here,' three fractographs will suffice to carry the

Jan 1, 1952

Jan 1, 1907

By G. S. Rice

The subject of dust explosions in coad mines first appears in the Transactions of this Institute following the first great mine disaster that happened in…

Jan 1, 1915

By H. E. Mussey

When the American Institute of Mining Engineers visited the Birmingham district in May, 1888, the four Ensley furnaces (Fig. 1) then completed were referred to as monumental.' Their dimensions are givcn in Table 1. Mr. Gordon stated, with considerable satisfaction, that on the preceding day one furnace had produced 165 tons. The blast was

Jan 1, 1925

By Theodore H. Orem

In 1928 Elam,1 discussing the subject of twinning in metals, disclosed that she had observed this phenomenon in aluminum, a metal little susceptible to twinning. The twinning described was one in which the boundary between the twinned portions was not a geometric plane but appeared, in one section, more like a normal grain boundary. Under these circumstances twinning might remain unrecognized by an observer of microscopic sections. She therefore suggested that twinning in aluminum might be much more prevalent than expected. Whereas the parallel composition lines shown in sections of polysynthetic twins were characteristic of the phenomenon of twinning, Elam pointed out that from the absence of

Jan 1, 1963

MINING ENGINEERING presents the annual membership report of the Society of Mining Engineers; see page 109.

Jan 7, 1963

NEW MEMBERS. The following list comprises the names of those persons who became members during the month of flay, 1913: Members. BASTIN, EDSON S., Geol U. S. Geological Survey, Washington, D. C BUCHERER, Louis, Cons. Engr Apartado 1471, Mexico City, Mexico. BURDICK, CHARLES A., Min. Engr 74 Broadway, New York, N. Y. CARR, HOMER L., Min. Engr 109 W. 88th St., New York, N. Y. CARTER, RUSSELL S., Mech. Engr. & Asst. Gent Mgr., Ingersoll-Rand Co., 11 Broadway, New York, N. Y.

Jan 6, 1913

By L. P. Teas

The main facts brought out by the study of the blende-bearing ores examined are as follows: 1. Chalcopyrite as minute triangular or rectangular dots, or as

Jan 1, 1918

NEW MEMBERS The following list comprises the names of those persons who became members during the period May 10 to June 10, 1914. Members ABE, ASAKA, Chief Min. Engr., Yamagano Gold Mine, Satsuma-Gori, Satsuma, Japan. ANDERSON, FRANK M., Geol Cartagena Refining Co., Cartagena, Colombia, S. A. BACON, MAURICE W., Genl. Mgr Stewart Mining Co. Butte, Mont. BACON, RAYMOND F., Chem Director, Mellon Institute, Pittsburg, Pa. BAKER, HAMILTON WALLACE, Min. Engr Fernley, Nev. VON BAYER, AUGUST HECTOR, Supt Kentucky Solvay, Coke Co., Ashland, Ky. BISHOP, WHEELER SCOTT, Research Chem Care Braden Copper Co., Rancagua, Chile, S. A. BOWEN, CHARLES GILMAN, Timekeeper 208 School St., Grass Valley, Cal. BOYER, SAMUEL L., Mine Operator, Mgr., Mike. Horse Min. Co., W. 2808 Boone Ave., Spokane. Wash.

Jan 7, 1914

By Richard McCaffery

CONTENTS PAGE 1. Research on Blast-furnace Slags (A Progress Report). By Richard S. McCaffery 5 2. Determination of Viscosity of Iron Blast-furnace Slags. By Richard S. McCaffery, Clarence H. Lorig, Ira N. Goff, Joseph F. Oesterle and Oscar O. Fritsche 27 3. Effect of Magnesia on Slag Viscosity. By Richard S. McCaffery, Joseph F. Oesterle and Oscar O. Fritsche 55

Jan 1, 1931

ON the face of it, the American Mining Congress meeting was a big success, as witness the smiles on the AIME members, pictured here, who attended. The grins were captured at Booth 232, where caricaturist Lenn Redman held forth for the Independent Pneumatic Tool Co., sketching 114 subjects in one week.

Jan 10, 1950

[ ]

Jan 1, 1938

[ ]

Jan 1, 1938

By Kenneth K. Humphreys, J. W. Leonard, T. S. Spicer

INTRODUCTION Reasons for Thermal Drying The continuing increase in the percentage of - '/4 in. ( -6.3 mm) coal produced as a result of the increased use of mechanical mining methods has, over the years, tended to shift considerable portions of the work of producing salable coal to the fine coal cleaning section of the preparation

Jan 1, 1979

CONTENTS SECTION I Page Page War Notice v Personal xv St. Louis Meeting vi Employment : : xvii Nominations for Officers ix Local Section News xviii Burr A. Robinson x Meetings of Societies :.: xxiv New Collective Index of Transac- Library xxv tions xi Membership : xxxii Alabama Technical Association... xi Institute Committees xlix Proceedings, Meeting of Board of Officers and Directors lvi Directors xi Members of the Institute in Mili- tary Service xiii

Jan 8, 1917

By Joseph W. Leonard

Partition (Tromp) curves, as used in diagnosing problems in coal cleaning equipment, are discussed and classified using five arbitrarily chosen types to represent, on a scale from one to five, system performance. Causes of unsatisfactory Tromp curves for various cleaning units, ranging from operational inadequacies to problems best corrected by the equipment builder, are analyzed.

Jan 1, 1982

By Royal Preston Jarvis

The jig, in one form or another, continues to hold a leading place among the machines designed to separate two or more

Jan 1, 1909

By J. H. Keeler

AN alloy of zirconium containing 18 atomic pct Cb was found to be body-centered-cubic and readily deformable at room temperature. The behavior of this alloy provided an opportunity to determine if

Jan 1, 1957

CURRENT MATTERS Page Page New York Meeting, Feb., 1918 .... v 1918 Dues xxvii Meeting of Board of Directors.... vii Members in Military Service .... xxvii Resolution on Manganese viii Personal xxix Special Mission of British Minis- Positions Vacant xxx try of Munitions viii Engineers Available xxxi War Committee of Technical Forthcoming Meetings xxxii Societies ix Advertising Section Remodeled.. xxxiii Local Section News ix Library xxxiv Affiliated Student Societies xx Membership xxxviii The Women's Auxiliary xxi Biographical Notice of W. T. Hall lv Other Societies xxiii Institute Committees lvi Engineering Symbols ... xxvi Officers and Directors lxiv General Index xxvii

Jan 1, 1918

NEW MEMBERS The following list comprises the names of those persons who became members during the period July 10 to Aug. 10, 1914: Members BAKER, FRED SHERMAN Tabowie, Unsan, Korea. BISSET, DANIEL GEORGE, Engr., 142 3d Ave., N. W., Edmonton So., Alberta, Canada.. BRANDT, MAURICE SHELDON, Chief Engr., White Eagle Mining & Milling Co., Box 298, Boulder, Colo. BROWNING, EDWARD, Min. Engr., Asst. to Supt., Cornwall Ore Bank Co., Cornwall, Pa. CASTLETON, WILLIAM ARTHUR, Mill Supt., East Butte Copper Mining Co., Butte, Mont. CHIDESTER, WALTER BARCLAY, Min. Engr., Care Mother Lode Mine, Greenwood, B. C., Canada. CLARK, EDWARD HARDY Mgr.,.Hearst Estate, 15 Broad St., New York, N. Y. CLARK, FREDERICK P., Chief Chem., International Lead Refining Co., East Chicago, Ind.

Jan 9, 1914