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FRIENDS of the late Charles F. Rand presented in 1930 a sum of money from which the income is available to support various phases of the work of the Institute in which Mr. Rand was so deeply interested. At present the fund amounts to $10,000. The specific terms of the deed of gift are as follows: "The fund collected to establish a memorial to the late Charles F. Rand shall be placed in the custody of the Board of Directors of the American Institute of Mining and Metallurgical Engineers, to be set up as a trust to be known as the `Charles F. Rand Foundation,' the income of which shall each year be applied to a distinct purpose to be decided upon in that year by vote of the Board of Directors. This purpose shall be such as to promote the general welfare of the Institute and to constitute a permanent memorial of the usefulness of Mr. Rand, who for many years gave unstintingly of his time and talents in its service.

Jan 1, 1946

FRIENDS of the late Charles F. Rand presented in 1930 a sum of money from which. the income is available to support various phases of the work of the Institute in which Mr. Rand was so deeply interested. At present the fund amounts to $10,000. The specific terms of the deed of gift are as follows: "The fund collected to establish a memorial to the late Charles F. Rand shall be placed in the custody of the Board of Directors of the American Institute of Mining and Metallurgical Engineers, to be set up as a trust to be known as the `Charles F. Rand Foundation', the income of which shall each year be applied to a distinct purpose to be decided upon in that year by vote of the Board of Directors. This purpose shall be such as to promote the general welfare of the Institute and to constitute a permanent memorial of the usefulness of Mr. Rand, who for many years gave unstintingly of his time and talents in its service.

Jan 1, 1952

IT is a pleasure for the translators to record their gratitude to the Seeley W. Mudd Memorial Fund of the American Institute of Mining and Metallurgical Engineers for underwriting the cost of publication of this volume, to the Printing-Office of the Yale University Press for doing an unusually fine printing job, and to the following for granting permission to reproduce the title pages of volumes in their collection: The Bibliothèque Nationale of Paris, for edition A of the Bergbüchlein; the Osler Library of McGill University, Montreal, for editions B and G of the Bergbüchlein and edition D of the Probierbüchlein; Mr. Herbert Hoover, Jr., for editions C and E of the Bergbüchlein and editions E, M, N, and 0 of the Probierbüchlein; the Parsons Collection of the Reference Department of The New York Public Library, for edition D of the Bergbüchlein; the Library of the Bergakademie Freiberg, for edition F of the Bergbüchlein and editions A, H, and L of the Probierbüchlein; the Herzog August-Bibliothek of Wolfenbüttel, for edition C of the Probierbüchlein; the British Museum. Library, London, for edition I of the Probierbüchlein; and the library of the University of California at Berkeley, for edition J of the Probierbüchlein. The cooperation of those who helped with the translation of the Bergbüchlein is acknowledged on p. 64. A. G. S. C. S. S.

Jan 1, 1949

By E. R. Parker, E. A. Smith

Metallurgists and engineers have always been interested in the mechanism of high-speed deformation because metals are rapidly deformed in various applica-tions and manufacturing processes. The deformation of metals by impact loads has recently engaged the attention of a number of investigators. Many of their results have not been disclosed but some of the published investigations1-8 have shown that the tensile strength, yield strength and elongation generally increase with increasing strain rate. The investigation reported herein is an attempt to determine the reason for this increase in strength and elongation. found to depend upon the strain rate. In the bars broken at high speeds, the slip bands appear to be more numerous. This might account for the higher strength as well as the greater elongation. Experimental Procedure Single crystals of copper (approximately 99.98 per cent) were made in graphite molds by the conventional method of lowering the mold out of the hot zone of a hydrogen furnace at a rate of one inch per hour. Solidification progressed from the bottom upward, forming a single crystal. The crystals were about 0.30 in. in diameter and 4 in. long. They were

Jan 1, 1944

By E. A. Smith, E. R. Parker

Metallurgists and engineers have always been interested in the mechanism of high-speed deformation because metals are rapidly deformed in various applica-tions and manufacturing processes. The deformation of metals by impact loads has recently engaged the attention of a number of investigators. Many of their results have not been disclosed but some of the published investigations1-8 have shown that the tensile strength, yield strength and elongation generally increase with increasing strain rate. The investigation reported herein is an attempt to determine the reason for this increase in strength and elongation. found to depend upon the strain rate. In the bars broken at high speeds, the slip bands appear to be more numerous. This might account for the higher strength as well as the greater elongation. Experimental Procedure Single crystals of copper (approximately 99.98 per cent) were made in graphite molds by the conventional method of lowering the mold out of the hot zone of a hydrogen furnace at a rate of one inch per hour. Solidification progressed from the bottom upward, forming a single crystal. The crystals were about 0.30 in. in diameter and 4 in. long. They were

Jan 1, 1944

By Donald Ingvoldstad, Harold E. Lee

At Bunker Hill the original charge storage and preparation system was installed in 1917 to accommodate lead-silver gravity mill products. Only minor tonnages of wet fines such as vanner and flotation concentrates were received. Charge flux and diluent requirements were provided by an ample supply of siderite middlings and coarse limerock. While oversize material was crushed through Y4-in., the use of roll crushers in series resulted in a more or less granular, free-running charge of adequate porosity. Under such conditions, receipts could be proportioned directly from receiving bins, and suitable blending was obtained by passing the resultant layered composite through a small Stedman disintegrator. This elementary system served well for production and smelting of an extremely lead-rich sinter, in the low column blast furnace. Here sinter physical quality is less critical, and appreciable quantities of raw flux and oxidized ore may be charged directly to the blast furnace without seriously impairing furnace capacity.

Oct 1, 1956

A SERIES of awards for men and women in indus-try who by their inventions, heroisms, vision, and powers of mediation are contributing daily to the life and well-being of America in a substantial way, will be given by the Harmon Foundation. The series, to be known as "Awards to Honor Men in Industry," consists of two cash prizes, $1,000 and $500 each, accompanied by a gold and silver medal respectively, and 100 bronze medals. No one above the rank of foreman will be eligible. Because of the diversity of .American indus-try, the Foundation is planning to confine its awards during the first year to the following branches of man-ufacturing: automotive, building, electrical, metal and textiles, including clothing. The Harmon Foundation invites the general public, newspapers, organizations and employees to bring to its attention such persons as they may deem worthy of the award.

Jan 3, 1928

Past-president Philip N. Moore has accepted the position of engineer member of the War Mineral Relief Commission and has already taken up the work. J. E. Spurr is the chief engineer of the Commission and is now organizing the examining staff.

Jan 4, 1919

By John D. Morgan

Uncertain world conditions of the present time require that this country be prepared to meet: 1) all out nuclear war with attack on the U. S.; 2) limited wars; 3) political, economic, and/or pyschological warfare. Our present position as a major world power derives in large measure from our free institutions and great industrial productivity, and this productivity in turn depends on a continuing flow of raw materials-metals, minerals, fuels, and agricultural products. The U. S., with only about 6 pct of the world's population, uses from one to two thirds of the world's annual supplies of most metals and minerals. The U. S. strategic materials stockpiling program is designed to enhance our national security position: as stated in the preamble of the Stock Piling Act, to decrease and prevent wherever possible a dangerous and costly dependence upon foreign nations for supplies of strategic and critical materials in times of national emergency.

Jan 8, 1960

By Raymond Dugdale, Fathi Habashi

There has been a recent interest in studying the action of anhydrous sulfur trioxide on ores to convert the metal values into a water-soluble form as a substitute for leaching by sulfuric acid. For example, Svenke1 converted the small amounts of uranium in slate ash into a water-soluble form by treating the material with SO, at about 600°C. Chao and Sun found that a variety of aluminum-bearing minerals could be sulfatized by SO, in the temperature range 400° to 600°C usually in the presence of a catalyst such as sodium sulfate. Kruse3 patented a process for beryllium recovery from the low grade ore in Utah by first reacting it with SO, at 560° to 750°C then leaching the product with water. In the present report, the action of SO, was examined in the temperature region 100°-300°C which was not investigated by those workers. Experimental Tests were conducted on a beryllium ore sample from Utah, the analysis of which is given in Table 1. It corresponds closely to a saponite ore type as given by Crocker et al. It was in powder form 45% passing a 400

Jan 1, 1973

By R. W. Raymond

In connection with the paper of Mr. Locke on Gilsonite or Uintahite (Trans., xvi., 162) read at the Salt Lake session of the Utah and Montana meeting, in July, 1887, the following data may be of interest and value. In December, 1887, I received from Mr. William Wagner, Seeretary of the Denver & Rio Grande Railway Co., a box of specimens of an asphaltic mineral from Utah. In the course of the correspondence which followed, I learned that the box had been forwarded by Mr. J. A. McMurtrie, of the firm of McMurtrie & Streeter, railroad contractors, Denver, Col. Mr. McMurtrie was, in 1883, chief engineer of the Denver $ Rio Grande Railway, and the mineral mas first brought to his attention in that year by Mr. Thomas H. Wigglesworth, who was then employed in making preliminary reconnaissances for wagon-roads to be used in constructing the Utah extension (now the Denver, Rio Grande $ Western) of the railway. Mr. Wigglesworth, I understand, was subsequently chief engineer of the Colorado & Utah Midland, and is now again employed by the Rio Grande. He writes substantially as follows concerning this mineral:

Jan 1, 1889

By Robert F. Griffith

In 1948 when the U.S. Bureau of Mines began the investigation of domestic monazite placers for the Atomic Energy Commission, deposits of this type amenable to large-scale operations were unknown in the U. S. Intensive search for such deposits had not been carried out in the past. Problems to be met included scarcity of men with placer experience and need for development of new exploration, evaluation, and analytical procedures. As a result of the exploration program three dredges have gone into operation in one area in Idaho and another dredge is operating in South Carolina. Search for Deposits In the search for areas to be investigated for monazite, the first step was a thorough study of all available literature reporting occurrences of the mineral. Initial work was guided largely by many reconnaissance reports prepared by the U. S. Geo- logical Survey and the AEC. As the work progressed many new deposits, not mentioned in the literature, were called to the attention of USBM engineers by prospectors who had noted the presence of the yellow, heavy sand while prospecting for placer gold. Every prospector was given an attentive ear.

Oct 1, 1955

By George W. Bain

Methods of mining building stone of any sort are planned to produce as few fractures as possible, and present a strong contrast to methods of mining metallic ores, which must be crushed eventually and have fractures produced in as great profusion as possible. Shocks transmitted to a stone invariably make it more porous and more permeable and reduce its effective life, therefore methods of mining building stone involve as This building illustrates the fine detail of workmanship, unprotected sharp corners and thin edges, and tall narrow columns characteristic of marble structures. These features require exceedingly coherent stone, and preservation of these features for decades or centuries demands many special quarrying precautions to keep absorption to 0.14 per cent or less, a detail not essential to stone for coarser architectural types. few shocks as possible. This is singularly true for marble because marble structures are intended to have long life, greater delicacy of line, more gracefulness and fineness of sculpture than those made from any other structural material (Fig. 1). So that delicate lines may remain in almost perfect preservation for decades, or even centuries, it is important

Jan 1, 1938

By George W. Bain

Methods of mining building stone of any sort are planned to produce as few fractures as possible, and present a strong contrast to methods of mining metallic ores, which must be crushed eventually and have fractures produced in as great profusion as possible. Shocks transmitted to a stone invariably make it more porous and more permeable and reduce its effective life, therefore methods of mining building stone involve as This building illustrates the fine detail of workmanship, unprotected sharp corners and thin edges, and tall narrow columns characteristic of marble structures. These features require exceedingly coherent stone, and preservation of these features for decades or centuries demands many special quarrying precautions to keep absorption to 0.14 per cent or less, a detail not essential to stone for coarser architectural types. few shocks as possible. This is singularly true for marble because marble structures are intended to have long life, greater delicacy of line, more gracefulness and fineness of sculpture than those made from any other structural material (Fig. 1). So that delicate lines may remain in almost perfect preservation for decades, or even centuries, it is important

Jan 1, 1938

Electro-mechanical actuator, self-protected for mechanical and electrical overload, is developed by RACO. Tubular housing consists of squirrel cage motor with hollow rotor shaft and inner threads in the rotor. Features stroke distance of 2-72 in. and wide range of trust (20 lb-10 tons). (100) Agglomeration systems, offered by Ferro-Tech, incorporate pelletizing, briquetting and extrusion systems to agglomerate materials too fine to convey, load or feed to a process. Equipment includes disc and drum pelletizers, briquetter presses, compactors, extruders, pugmills and mixers, dryers, coolers, feeders and conveyors. (101)

Jan 9, 1973

American Zinc Institute, 60 East 42nd St , New York, N Y. Julian D. Conover, Secretary The monthly Journal of the American Zinc Institute contains papers on zinc deposits, mining and metallurgy of zinc, as well as affairs of the Institute, statistics, and many papers on phases of the utilization of zinc It has the title "Zn " The numbers for each year are collected as volumes for that year, the first volume was issued in 1918, and the latest complete volume available is Vol 12 (1929) Copies of Indexes to the volumes will be sent upon request Back numbers of the Journal are not generally available for distribution but may be seen in most libraries For further information regarding papers, back numbers of the Journal, or volumes, address the Secretary

Jan 1, 1933

MISSOURI SCHOOL OF MINES The Missouri Mining Association has enjoyed a very good year. Last October the society was reorganized and the following officers elected for the year: E. Ross HOUSHOLDER, President, ORE N. MANESS, Vice-president, WILLIAM REBER. Secretary, RUAL CHAVEZ, Treasurer. The head of our mining department, Prof. C. E. Forbes, is now serving as a Major in the United States. Army. We were fortunate in having. Prof. Chas. E. Locke, of Boston, with us for part of the winter to take charge of the senior mining work. During the autumn and winter months we had a number of informal smoker lectures in Norwood Hall. Among the speakers at these meetings were: H. A. Buehler, Missouri State Geologist; Chas. E. Locke, Boston, Mass.; V. H. Hughes, Tulsa, Okla.; Dorsey Lyon, Washington; D. C.; Prof. G. H. Cox, Professor of Geology, Rolla, Mo.; together with a number of returned alumni.

Jan 8, 1918

By Benjamin Smith Lyman

[Secretary's Note.—For lack of room this abstract, giving only an outline of Prof. Lesley's scientific work, is published here, instead of the full text of Mr. Lyman's account of his life, labors and character, already sent to members and associates in a separate pamphlet. Mr. Lyman's sympathetic and discriminating analysis, accompanied with abundant illustrative details of Prof. Lesley's remarkably versatile and fruitful career, completes the picture imperfectly sketched in the present abstract. Copies of the pamphlet may be obtained at the office of the Institute.] The subject of this sketch was born in Philadelphia, September 17,1819, and graduated in 1838 from the University of Pennsylvania. His purpose of pursuing theological studies being hindered by the condition of his health, he took a subordinate position in the geological survey of Pennsylvania under Henry D. Rogers. His work there began in the sphere of topographical and geological map-making in which he was afterwards so eminent; and a map which he made of one field in 1840, before he was 21 years old, received high praise from Prof. Rogers in his official report of that year.

Jan 1, 1904

By W. H. HOWARD

Discussion of the paper of W. H. HOWARD, presented at the Salt Lake meeting, August, 1914, and printed in Bulletin No. 92, August, 1914, pp. 2029 to 2046. EDGAR M. DUNN, Anaconda, Mont.-Mr. Howard's contribution to the literature on the Cottrell, method. of electrostatic precipitation of flue dust and fume at Garfield has been read by us with peculiar interest for the reason that we have been experimenting with the same process at Anaconda for the past eight or nine months, with a view to adapting it, under the direction of Dr. Cottrell and the supervision of J. 0. Elton. and D. R. Kellogg, representing the Anaconda Smelter Commission, to the treatment of very large volumes of gases, using large pipe treaters and various forms of electrodes, with about 150,000 volts rectified current. For the amount of gas to be treated here the 5-in. pipe means a cost for installation that is practically prohibitive, clue to the tremendous number of pipes required, and we have been trying to cut installation costs by increasing the size of the pipes. All of our work is still in the experimental stage, but we have obtained good clearance on our mixed roaster and converter gases with a 3-ft. pipe treater 20 ft. long, and with 5 ft. velocity therein; and with a discharge electrode of a single No. 29 nichrome wire set in the middle of the 3-ft. pipe, with. a consequent electrode spacing of 18 in. The current used has been 150,000 to -160,000 volts, .and of course there have been troubles galore, relating particularly to insulation and rectifying. Blast-furnace gases did not give so good clearance, probably due to relative poverty in moisture and S03 content of blast gases to roaster-converter gases; making the blast gases the poorer in conductivity. Our experience has been so satisfactory that in our next experimental plant-built on a somewhat larger scale-we shall attempt a 4-ft. treater with greater electrode spacing, and a somewhat higher voltage-up to 220,000. As to fractional precipitation, mentioned by Mr. Howard, this idea was tried out at Anaconda last year (1913). Formerly our furnaces (Bruntons) roasting flue dust for the recovery of white arsenic, passed so great an, amount of dust to the settling kitchens that refining of this arsenical product was necessary to eliminate the 5 to 20 per cent. dust contained therein. Consequently the manufacture of As203 was effected in two stages, with a reverberatory roast of the first .product to obtain the final 99.5 per cent. As203. -

Jan 11, 1914

By Martin Coryell, Eckley Coxe, R. P. Rothwell

WILKES-BARRE, PA., April, 1871. THE great development of the mines and metallurgical works of this country during the last few years, accompanied as it has been by the investment of enor¬mous sums of money in purchasing lands, and in the erection of improvements, requires that advantage should be taken of the accumulated knowledge of engi¬neers, superintendents, and others, in mastering the problems which are con¬stantly presenting themselves for our action. Among those may be mentioned the consideration of more economical systems of mining in our coal and metal¬liferous mines, improved methods of transportation above and below ground, unwatering and ventilating mines, the mechanical preparation of coal and other minerals, the various metallurgical processes, and, in fact, every question tending to the attainment of two great objects 1st. The more economical production of the useful minerals and metals. 2d. The greater safety and welfare of those employed in these industries. In European countries, where the arts of mining and metallurgy have long been the subject of the most careful study, no means have been found so effectual in attaining the end above proposed as the free interchange of experience among those actually engaged in these industries, and this object has been accomplished, mainly, through the medium of institutes, associations or societies, composed of those engaged in these occupations, and by the- periodical publication of essays or papers, communicated to such societies by their members. It must be evident to all practical men that the interchange of the varied experience of those engaged in such occupations in this country could not fail to advance very materially the desired objects; it is, therefore, proposed to establish an American Institute of Mining Engineers, which will hold its meetings periodically in the great mining and metallurgical centres, where works of interest, such as mines, machine shops, furnaces, and other metallurgical works, can be inspected, and the members exchange their views, and consult for mutual advantage upon the difficulties encountered by each; these transactions or proceedings, when published, would form a most valuable and greatly-needed addition to our professional literature. It is proposed that a meeting of those sympathizing with the object above men¬tioned shall be called for the purpose of organizing such an association, the place and time of meeting being Wilkes-Barre, Pa., and the month of April or May. Communications indicating the opinion and wishes of all, both as to these points, and also as to the organization and objects of the Institute, will be gladly received by any of the undersigned, and a notice of the date of meeting, which will be arranged to suit the greater number, will be duly communicated. Any

Jan 1, 1873