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By T. F. Witherbee

The following calculation of heat requirement covers the working of the furnace from January 25th to February 14th, inclusive. A short time previous to the first date the furnace had been working rather badly, so that 300 lbs. of ore and 500 lbs. of limestone were taken off. Within the time mentioned the quality of the iron passed

By M. A. Matzkin

The Problem: There are no roads and mapping has been inadequate. There isn't a clearing large enough to accommodate a conventional airplane. Entry would consume months, yet the area must be investigated. Sustained communication is impossible except by radio. Cost in time and money for exploration would be exorbitant. . . . . . . . .

Jan 9, 1953

For the benefit of those of our members who are considerable holders of securities, but owing to their isolated situations are not in close touch. with the, metropolitan market and current quotations, we are publishing two very interesting graphs, showing the course of the bond and stock markets in New York over a long period. These graphs are furnished through the courtesy of the financial department of the New York Tribune.

Jan 9, 1919

PITTSBURG MEETING The One Hundred and Ninth Meeting of the Institute, for the presentation and discussion of technical papers, will be held at Pittsburg, Pa., Oct. 8, 9 and 10, 1914. This meeting is to be under the auspices of the Iron and Steel Committee, the Committee on Petroleum and Gas, the Committee on Coal and Coke, and the Committee on Non-metallic Minerals. Thirty papers have been secured by these Committees and will be presented at the meeting. These papers will be published in the September and October Bulletins. The Local Committee of Arrangements for this meeting is as follows: SAMUEL A. TAYLOR, Chairman. FRANCIS C. PHILLIPS. GEORGE S. RICE. C. F. V. Rys. KENNETH SEAVER. JOHN S. UNGER.

Jan 9, 1914

By A. A. Gustafson

The Freeport Sulphur Co. built a portable crusher in 1944 that solved a problem that none of the crusher manufacturing companies contacted were able to do. Two of these crushers have now been in service for 6 years, giving satisfactory service in handling a million tons per year, and having a capacity of over 2000 long tons per 8-hr shift. These machines reduce ton size blocks of sulphur to 12 in. and also feed the conveyor system at the rate of 350 long tons per hr per machine.

Jan 10, 1950

By John V. Beall

They came from Paris, Washington and Rabat; two directors, two chief geologists and the president of our own local subsidiary company. Such a meeting was not unprecedented, but it seeemed to us that our president was overzealous in arranging for inspections of each exploration site. One was a problem. Jacques, our president, had concocted the idea that we should lead this learned, mature (not exactly aged) group into the desert to see newly found anomaly. It was in virgin country and had been marked by dropping a flour sack on it from the air.

Jan 1, 1971

G. K. BURGESS, ? Washington, D. C.-At the Bureau of Standards it was decided, in order to study the high-aluminum end of these curves, that efforts should be made to prepare pure aluminum, and the promise of getting aluminum, practically free from the two elements that have such great effect in very small quantities, namely, silicon and iron, and which

Jan 12, 1919

By James S. Browning, B. H. Clemmans

BERYLLIUM, obtained mainly from the beryllium-aluminum silicate, beryl, is one of our most strategic and critical metals. Strategic because suitable substitutes for many of its alloys have never been developed. Strategic because of certain uses and potential uses of a classified nature in our nuclear energy program. In this field, substitutes have been developed, but only at the expense of a reduction in efficiency.

Jan 8, 1953

By R. L. Sandefur

Professor Kim's excellent review article1 on ultimate pit planning contains a statement of the apparently widely held but incorrect belief that "kriging provides information on the confidence limits around the estimate which no other extension technique is capable of supplying." If a geostatistical approach is valid, there are several good reasons for using kriging but uniquely provided confidence limits is not among them. If kriging is possible, then confidence limits can be calculated for any other linear estimate.

Jan 6, 1979

*J. H. Brennan, Union Carbide Metals Company, Niagara Falls, N. Y. S. B. Casey, Jr., Swindell-Dressier Corporation, Pittsburgh, Pa. C. M. Cosman, Vanadium Corporation of America, New York, N. Y. H. E. Dunn, Vanadium Corporation of America, New York, N. Y. C. S. Finney, Eastern Gas and Fuel Associates, Boston, Mass. M. O. Holowaty, Inland Steel Company, East Chicago, Ind. John Mitchell, Eastern Gas and Fuel Associates, Boston, Mass. Leo F. Reinarts, Armco Steel Corporation, Middletown, Ohio H. E. Rowan, Dwight-Lloyd Division, McDowell Company, Inc., Cleveland, Ohio R. W. Shearman, The Metallurgical Society of AIME, New York, N. Y. C. M. Squarcy, Inland Steel Company, East Chicago, Ind. F. Weston Starratt, The Metallurgical Society of AIME, New York, N. Y. A. B. Wilder, National Tube Division, United States Steel Corporation, Pittsburgh, Pa. *Deceased

Jan 1, 1961

By Frank Firmstone

The material described below was made at Furnace No. 2, Longdale, Va., Oct. 28, 1907, during a sudden derangement of working, in the course of which the furnace became entirely bridged over and for some time no solid material whatever descended into the hearth. This caused the hearth to become so completely emptied that, at the tuyere-level, a pricker put in at one tuyere could be seen by looking in at the opposite one. The tap-hole was opened and the iron got out with some difficulty. It ran sluggishly, throwing many sparks, but was not

Jan 1, 1909

By Thomas O. Breitling

The Mill Design Session at the Annual Meeting in New York next February will have a total of four papers. All of these papers will be concerned with the subject of in-plant dust in the hard-rock mining industry. The emphasis on efficient dust collection is timely, because dust is a problem not yet adequately covered in AIME papers. In general, dust collection should be the step following dust suppression. Dust collection and its return to the ore recovery circuit, or its waste to tailing are sources of added operating cost. If possible, dust should be kept in the main stream of ore flow by suppression.

Jan 1, 1970

By William P. Blake

AMONG the many interesting objects to be seen at the Vienna Exhibition last summer, the model of the system of underground transportation by a continually moving chain, adopted at the Hasard collieries, at Micheroux, near Liége, Belgium, was one of the most attractive, and full of valuable suggestion to mining engineers. These collieries are under the superintendence of the celebrated

Jan 1, 1874

An ore search for commercial titanium-bearing ore deposits is in progress by the Crane Co., manufacturers of valves, because they expect this metal to be important in valve manufacturing in the future. The company will eventually be mining and making titanium sponge. At present they are buying titanium tetrachloride from the Stauffer Chemical Co, at Niagara Falls and making titanium by reaction with magnesium. Production from the Babbitt concentrator of Reserve Mining Co. is scheduled to begin in late 1951 or early 1952. The capacity is to be 300,000 tons of pellets per year made from magnetic taconite concentrates.

Jan 7, 1951

By James A. Brierley, Corale L. Brierley

Microorganisms have been considered as agents which may be of importance in catalyzing hydrometallurgical processes for the extraction of metals from low-grade ore minerals. Various microorganisms and their role in bacterial leaching are described. Bacterial leaching as applied to copper, uranium, zinc, lead, and coal is discussed.

Jan 1, 1981

EXECUTIVE COMMITTEE OF THE BOARD OF DIRECTORS C. H. MATHEWSON. Chairman PAUL D. MERICA, Vice-Chairman CHESTER A. FULTON CARROLL A. GARNER H. Y. WALKER FINANCE COMMITTEE OF THE BOARD OF DIRECTORS ERLE Y. DAVELER, Chairman WILBER JUDSON RUSSELL B. PAUL HENRY KRUMB, Consultant

Jan 1, 1943

After a year-long study comparing existing crafts and techniques for ocean exploration with the future needs of oceanologists, the University of Pennsylvania's ocean engineering research team has come up with a system proposal for prolonged deep-sea exploration. Given the assumption that it will be necessary to re-explore our oceans every 25 years or so, engineers from the University's Towne School of Civil and Mechanical Engineering believe the best sys- tem for future ocean exploration would consist of a stable, manned surface ship operating and controlling two types of vehicles-an unmanned untethered craft for broad search missions, and an unmanned, tethered vehicle for detailed work.

Jan 12, 1969

1-Iron and Steel JOHN A MATHEWS, Chairman Ralph H SWEETSER Vice-chairman WILLIAM CAMPBELL, Vice-chairman MAX ROESLER, Secretary Iron Ore CHARLES B MURRAY, Chairman R C ALLEN W O HOTCHKISS MAX ROESLER ERNEST F BURCHARD THOMAS T READ DWIGHT E WOODBRIDGE M M DUNCAN WILLIAM KELLY CARL ZAPFFE C T FAIRBAIRN CHARLES F RAND

Jan 1, 1923

Australian research scientists at the University of Melbourne's Institute of Materials Research have discovered two methods of extracting metals from raw ore, using brown coal. The discoveries could lead to extensive new markets for the brown coal producers of Australia (boasting the world's largest brown coal deposits in the Latrobe Valley region of Victoria), the United States and West Germany. Research on the extraction processes began at the University's Department of Metallurgy in mid-1969 under the direction of Geoffrey Cullen, manager of the Materials Research Institute. In June of this year. Cullen announced that both metal extraction processes, using brown coal, had proven successful.

Jan 1, 1971

A new Military, Engineering School has been established at Camp A. A. Humphreys, Virginia. This camp was used throughout the summer and fall of 1918 for the Engineering Officers Training School in preparing engineer officers for the United States Army. The camp and the courses prescribed were laid out on an ambitious scheme, which since the armistice has been signed, have been directed wholly, toward the permanent establishment of an Engineering Training School for Officers of the regular Army. Those young officers who were graduated from Nest Point at the end of a two-year course, necessitated by the emergency, have been ordered to Camp Humphreys to complete their engineering education.

Jan 3, 1919