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ENGINEERING department problems of unravel- ling filing systems of reference data, detail drawings, magazine tear sheets, technical records, manufacturers' catalogs-and coordinating them with the information classification systems employed by the company library and other information services -are being solved in many cases by adopting a basic classification system such as that used by Sweet's Catalog Service and applying its classification and indexing methods to file or bookshelf. By this procedure the engineering department does away with the confusion, duplication, and conflict that exist between personal, department, and company library files. It establishes a pattern for regulating and distributing the potential information that piles up daily in the engineering department basket marked "Incoming."

Jan 5, 1954

By Frank C. Greene

Drilling in Missouri in 1944 was nearly treble the rate of 1943 because of continued development of the Tarkio pool in Atchison County and the preparation of a pool in Jackson County for a water-injection project. The pipe line from the Prairie Point gas pool in Platte County was in operation throughout the year of 1944, but several of the shallow oil pools in Cass and Jackson Counties were off production during much of 1944 because of a shortage of help. Table I gives a summary of activities by counties. The total footage drilled was 41,475 .ft., of which 21,187 ft. was by rotary tools and 20,268 ft. by cable tools.

Jan 1, 1945

Nippissing Mines Co., Ltd., a Ventures subsidiary, has bought into the, Vermont Copper Co. Inc. which operates a copper mine in Vermont producing 700 tons daily. The Vermont Mining Co. has been in operation since 1943 under the present management. When present owners wanted to convert their holdings to cash, the Ventures people saw possibilities in the area which, has been little explored but has a sizable production record. Final approval of the Anaconda-Harvey project for a 72,000 ton aluminum reduction plant at Kalispell, Mont., has been announced by Defense Production Administration. After considerable discussion in the past few weeks regarding Anaconda's entrance into the aluminum field, the approval stated "clearly the best arrangement."

Jan 1, 1952

During the four years that Burr A. Robinson has held the position of Assistant Secretary of the Institute he has not only won the regard and admiration of the Directors and his associates at headquarters because of his unselfish devotion, efficiency and painstaking application, but lie has formed a wide circle of friends among the members of the Institute. All will learn with regret that he has voluntarily severed his connection with the Institute in order to take a position with the United States Rubber Co., which offered such flattering prospects for the future that the Board of Directors, in spite of their disinclination to lose his services, did not feel justified in urging him to decline.

Jan 8, 1917

By G. Wranglen

On account of the possibility of isolating carbides in steel it is generally assumed that the electrode potential of iron carbide is more noble than that of ferrite.1,2,3,4,5 Differences from 0.032 V1 to 0.4 V4 have been recorded. However, it is important to realize that the more noble behavior of cementite in relation to ferrite is not an issue of thermodynamics but of reaction kinetics. Theoretically, cementite is less noble than ferrite, which is a direct consequence of its thermo-dynamic instability. With the value ?F°298 = +4700 cal per mol for the free energy of formation of cementite6 it is easily calculated that the electrode

Jan 1, 1950

Sept. 3-6, AIMS, Fall Meeting, Industrial Minerals, Minerals Beneficiation, Mining, Geology, & Geophysics, Iron and Steel, and Coal Div., Palmer House, Chicago. Sept. 3-13, AIMS, Chicago Section, Centennial of Engineering, Chicago. Sept. 5-6, Engineers' Connell for Professional Development, annual meeting, Hotel Sheraton, Chicago. Sept. 8-15, International Geologic Congress, Algiers. Sept. 11-13, American Institute of Chemical Engineers, Palmer House, Chicago, Ill. Sept. 18, RIME, Utah Section, Newhouse Hotel, Salt Lake City. Sept. 22-25, American Mining Congress, Metal and Nonmetallic Mining Convention and Exposition, public auditorium, Denver. Sept. 23-25, Institution of Mining and Metallurgy, symposium on mineral dressing, Royal School of Mines, London. Sept. 30, AIME, Morenci Sub-section, Longfellow Inn, Morenci, Ariz.

Jan 1, 1952

By Richard H. Terhune

Slag and matte, in lead and copper smelting, are, for convenience of removal, tapped into pots of small capacity, usually of paraboloid form, of cast-iron, weighing 275 to 300 pounds, and holding the same weight of slag. As in many smelting districts one ton of ore makes a ton and a quarter of slag, a large number of pots is needed to equip an ordinary plant. Sudden and frequent expansion of the solid bowl causes the pots to crack at the bottom in a few months, and the matte, a very fluid sulpliide, enters these rough fissures and speedily corrodes its way through the vessel. 1 find, from one year of practice with a slag-

Jan 1, 1887

(Members are urged to send in for this column any notes of interest concerning themselves or their fellow-members.) Members and visitors who registered at Institute headquarters during November: George W. Otterson, Mauson, B. C. Roy H. Allen, Chihuahua, Mexico. E. L. C. Ayres, Bound, Brook, N. J. George A. Packard, Boston, Mass. M. Russell, Bound Brook, N. J. Richard C. Patterson, Jr., Kansas City,,Mo. Carlo Spruyt, Antwerp, Belgium. Francis C. Phillip, Pittsburg, Pa. Charles A. Pringle, San Francisco, Cal. M. H. Kuryla, Mexico City, Mexico. E. S. Bardwell, Great Falls, Mont. Arthur Chippendale, Mexico City, Mexico. Sir Robert Hadfield, London,, England. F. Danvers Power, Sydney, Australia. James A. Barr, San Francisco, Cal..

Jan 12, 1913

By J. Wright, R. J. Tyler

Abstract-Changes in the pore structure of hematite pellets during reduction to iron were investigated under a variety of experimental conditions. Pore structures were determined by a mercury penetration technique. The reduction temperature was found to be the major influence on structure, the pore system being bimodal below 750°C and unimodal above 900°C. Pore sizes ranging from 0.04 to 20 [um] were observed in completely metallized pellets produced over the temperature range 650-1050°C. Gas composition and reduction rates also influenced the pore structure of the metallized pellets, although to a lesser extent than the reduction temperature. An apparent activation energy of 24 kcal/mole was derived for the pore formation ptocess.

Jan 8, 1978

By John F. Abel

AIME is closing the books on its first 100 years. In the next year the meetings and many papers will doubtless be filled with statistics on the growth of AIME, and, incidentally, on the mining industry. Let's try to keep our cool and avoid breaking our arms patting ourselves on the back. AIME, nationally and locally, runs on the drive and dynamism of a rather small number of its members. If you look at the annual SME Blue Book of national officers and committee members, you will be struck by the repetition of the same names throughout. Trend for a few men to shoulder the burdens and responsibilities can be seen on the local level, too.

Jan 1, 1970

US 4,201,749-In the Bayer process production of alumina wherein aluminum hydroxide is precipitated from a sodium aluminate solution for use as seed, sodium oxalate and caustic components are removed from the precipitate by washing it first with a washing liquor which is saturated with sodium oxalate but has little content of caustic, and secondly with hot water. Substantially no sodium oxalate is recycled, yet loss of sodium aluminate is minimal. K. Yamada, T Harato, and H Kato, assigned to Sumitomo Aluminum Smelting Co Ltd May 6, 1980 8 pp. (423-127). Filed. 5-8-79 (37,145) Priority. Japan, 5-8-78 (53/54,803). Same¬British 2,020,642, dated Nov. 21, 1979.

Jan 1, 1982

By D. M. McFarland

A FEW years ago a novel electric detonator known as the split-second or millisecond delay electric blasting cap was introduced for use in quarry blasting. Regular electric blasting caps fired in series may be depended upon to fire within a millisecond or so from the first to the last in a series. Regular delay electric blasting caps are provided that fire one period after the other period in intervals of 1/2 to possibly 1 l/2 sec. Most split-second or millisecond delays are designed to fire one period after the other period in possibly 25 to 50 millisecond intervals. The ear is not capable of detecting time intervals of this magnitude.

Jan 11, 1950

By C. A. Mezger

DURING my stay at Raposos, State of Minas Geraes, Brdzil, I had the opportunity of making some observations, which, in the shape in which I am able to lay them before the Institute, are only to be considered as an experience which may possibly have important consequences. The ore-bodies worked there for gold are exclusively chimneys, mostly cylindrical, following the dip of the argillaceous slates (about 45° E.), without any visible connection with each other, without veins, and only exceptionally with some small stringers along the stratification, pinching out at short distances from the chimneys. They are composed of quartz with about 8 to 10 per cent. of pyrite and pyrrhotite, and different iron oxides.

Jan 1, 1895

By Nicholas J. Grant, Olaf Troili, John Chipman

D. C. Hilty (Union Carbide & Carbon Research Laboratories, Niagara Falls, N. Y.)—How does this effect of silica compare with the effect of silica in combining with the lime in the slag to reduce the activity of CaO, thereby affecting the first equation? John Chipman(authors' reply)-—That is the object of showing this effect for slags of two different basicities. In the more basic, the silica is more firmly tied up in the slag and is less easily reduced. It is therefore less able to interfere with desulphurization. The important point is that silica is acting in two ways. Of course it is an acid and as an acid it ties up lime and in tying

Jan 1, 1952

By Immo H. Redeker

North Carolina is the leading state in the US in lithium mineral production. Spodumene is mined in open pits and concentrated by flotation by the two companies, Lithium Corp. of America and Foote Mineral Co. North Carolina State University has a mineral research laboratoy in Asheville, N. C., with trained personnel, batch and pilot plant facilities to assist in the state's mineral development. The NCSU Minerals Research Laboratory assisted both lithium-producing companies with spodumene concentration problems and has lately worked closely with Lithium Corp. of America to develop the best flowsheet for spodumene and byproduct recovery. The concentration of North Carolina spodumene and byproducts from pegmatites is presented and illustrated with figures.

Jan 1, 1980

By W. A. Backofen, M. L. Ebner, D. H. Avery

Slip on (11221 planes, which do not contain a close-packed direction, has been identified on crystals strained at —190°C. Evidence is also presented to show that (1071) pyramidal slip is a mode of deformation at 25ºC in a limited orientation range. PYRAMIDAL slip (l011) <1120> in magnesium at elevated temperatures has been established for some time.1-2 More recently, Burke and Hibbard reported this mode of deformation at 25"C, but their results were questioned by Craig.&apos; Also, as far as the present authors know, slip in magnesium on pyramidal planes of the second order, Type II (1122)) has not previously been reported, although Gilman"," identified (1122) slip in another hexagonal metal

Jan 1, 1959

By R. J. Greaves

High-resolution seismic reflection profiling can be used to evaluate detailed structural and stratigraphic features of coal prospects. Since most coal prospects are relatively shallow, less than 1000 m (3000 ft) deep, high sampling rates in space and time can be used effectively to improve vertical and lateral resolution of seismic data. The case study presented here shows how seismic data was used to evaluate the Wyodak coal at a prospective coal gasification site. The data were used to map the detailed structure and thickness of the coal and to search for lateral discontinuities, such as pinchouts and faults. An important find was a paleochannel cutting across the base of the coal seam, which was later confirmed by drilling.

Jan 1, 1986

By Thomas M. Barczak

The resultant load vector is the representation of the forces applied to a longwall roof support element by caving strata into a single, quantifiable measure of support resistance. The relatively complex kinematics of the shield support prohibit a determination of support resistance simply by summation of leg forces. A method is being investigated by the Bureau of Mines to determine the resultant load vector by instrumenting supports with pressure transducers and strain gages to measure leg, canopy capsule, and lemniscate link forces. This concept has been laboratory tested in the Bureau&apos;s Mine Roof Simulator. Functional relationships among variables have been assessed, and confidence intervals have been established for prediction of the resultant load vector parameters.

Jan 1, 1984

By Phillip A. Stoll, Young Ku Yoon

ThE deterioration of the magnetic properties of silicon-steel core materials during service (magnetic aging) is quite undesirable. Although some information about the effects of impurity elements on magnetic properties is available, 1,2 magnetic aging that occurs at low temperatures has not been extensively studied. Moreover, the microscopic techniques used by earlier workers were not suitable for study of fine metastable phases that are precipitated at relatively low temperatures. Recently, several investigators3,4 successfully used transmission electron microscopy in the study of low-temperature precipitation in Fe-C, Fe-N, and Fe-Mn-C alloys. To investigate metallurgical factors that affect magnetic properties after aging, the microstruc-tures of steels having different magnetic-aging

Jan 1, 1964

By C. N. Kravig

STANDARD raises at Homestake are 150 ft long. Raises of more than 150 ft, driven with the use of a cage and hoist, are considered long raises- some have been driven more than 900 ft. Long raises have eliminated the need for access drifts on each level when transfer and ventilation raises are driven. These timbered cage raises, 7x9 ft in cross section, include a rock compartment and a combination cage, pipe, and manway compartment. To prevent excessive weight on the timbers, 10x10-in. bearing beams are cemented into hitches cut in the rock at 150-ft intervals. The beams also hold back timber movement caused by daily drawing of rock through the rock compartment.

Jan 6, 1957