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The Missouri Miner, March 04, 1949

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, February 18, 1949

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, February 11, 1949

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, February 04, 1949

The Missouri Miner Newspaper

No abstract provided.

A Report On The Reduction Of Sphalerite Under Reduced Pressure, John H. Fuqua, William H. Magruder

Missouri School of Mines and Metallurgy Reports

During the last war, with the increased demand for magnesium metal and the general disregard for costs, a number of plants were constructed for the production of magnesium by vacuum metallurgical methods. (Both the Carbothermic Process and the Pidgeon Ferrosilicon Process employ vacuum systems for the production of metallic Mg.)

At the close of the war several of the government built plants were forced to suspend operations because of the economic impossibility of producing magnesium in competition with the Dow Chemical Company. It was with the availability of these plants in mind that experimentation with the possibilities of producing metallic …

The Missouri Miner, January 17, 1949

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, January 07, 1949

The Missouri Miner Newspaper

No abstract provided.

Missouri S&T Magazine, January-February 1949, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

Light Gage Steel Design Manual, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

A Study Of The Gelation Of Air-Setting Refractory Mortars, James Irving Mueller

Doctoral Dissertations

"Three basic mortar formulae were used in this investigation, each mix having some different materials present and each having its own gelling characteristics. The study was directed along the theory that the dry materials used play an important part in the hardening. Certain admixtures were tested and several were found to improve the workability after storage. The presence of additional sodium ions in the mortar was found to be helpful in overcoming the gelation but these tended to lower the refractoriness of the mortar.

A study was made of the base exchange capacities of the dry materials and the material …

Treatment Of Zinc Crusts By Vacuum Distillation, Chang-Hsu Shih

Masters Theses

"The purpose of this research is to investigate the possibility of obtaining reasonably pure silver from the zinc crusts by vacuum distillation in one step. The effect of temperature, pressure, particle size, and time of distillation will be determined. The behavior of other constituents in the crusts are also to be studied"--Introduction, page 5.

A Study Of Cathode Drift Compensation In D-C Amplifiers, Joseph W. Rittenhouse

Masters Theses

"The expression, cathode drift, has to do with the random variations in vacuum tube plate current which are attributable to similar variations in emission velocities of electrons leaving hot cathodes. The fact that these random current changes appear to result from spurious drifts in cathode potential, since all other electrode potentials are unrelated to them, give rise to the expression, cathode drift...The problem with which this paper is concerned is a study of some of the possibilities of compensating for cathode drift effects in a single amplifier stage. Specifically, this paper will: (A) present a detailed mathematical and graphical analysis …

A Determination Of The Surface Tension Of Tin In The Solid State, Charles Merton Rice

Masters Theses

"Many studies have been made on the surface tension of metals but almost exclusively in the liquid state. Information on metals in the solid state is needed in pure physics to test theories of cohesion and in physical metallurgy to explain sintering. The common approach to the problem of surface tension in the solid state is to hang a weight on a thin wire or leaf of metal and then heat this weighted sample to a temperature at which flow is appreciable. The shrinkage or stretch of the sample is then a measure of the surface tension. Of the recent …

Comparative Study Of The Collecting Property Of Naphthenic Acids With Oleic Acid As Applied To Calcite, Hematite, Barite, And Fluorspar, Siddhi Nath Mukherji

Masters Theses

"The present investigation was undertaken to find out any comparable collecting property of some of the industrial naphthenic acids available in the market with that of commercial grade of oleic acid so that some information may be available in selecting naphthenic acids as flotation collectors. In the flotation industry, usefulness of oleic acid as non-metallic minerals collector is well established. On the other hand, the use of naphthenic acids as flotation collector has been reported only in few cases. Even in those cases, no attempt has been made to correlate their collecting properties with that of their physical and chemical …

Geology And Mineralization Of The Minerva Mine No. 1, Hardin County, Illinois, Matthew Peter Nackowski

Masters Theses

"This study originally was undertaken to describe the witherite identified in specimens collected at the Minerva Oil Company Mine No. 1, Hardin County, Illinois. The original specimens of witherite were collected on October 25, 1948, by Charles E. Tothill, while on a senior trip through the fluorspar mine. The witherite was identified by Dr. O. R. Grawe, Chairman of the Geology Department, Missouri School of Mines, Rolla, Missouri, to whom the specimens were presented. Dr. Grawe suggested that the writer visit the southern Illinois fluorspar area to determine the occurrence and distribution of the witherite. This mineral had been described …

The Investigation Of Color Modification As A Result Of Solid Solution, Bobby Lee Mornin

Masters Theses

"To the ceramic industry, color has long been one of its chief problems, not only in reproducing colors in the many complex silicate structures but in the development of stains that are stable at high temperatures and that are economically feasible for mass production. At the present time a stable high temperature red or yellow would be very desirable. Solid solution has been employed in ceramics to modify and thereby provide ceramic materials of different physical characteristics. The limited data available with respect to such solid solution serves to indicate that perhaps this state may serve as an important means …

A Study Of The Power Consumption Of Mine Scrapers, Stanley Francis Johnsen

Masters Theses

"Since scrapers were first employed in underground mining work, numerous changes in scraper design have transpired until now there are several common types of scrapers in use in mines over the world. The proved models of scrapers have been developed over a period of more than fifty years. Although specific scrapers have been tested to determine the amount of power consumed, no literature could be found concerning the relative power consumption of the different types of scrapers when operated under identical conditions. Purpose of Problem - The purpose of this study is to determine the relative efficiency of different types …

Interrelationship Of Transverse Anchorage And Adhesive Bond In Welded Wire Reinforcement, Alan Arthur Becker

Masters Theses

"...Welded Wire Reinforcement Fabric has been applied only to certain "light types" of reinforced concrete construction. It has not as yet been applied as main tension reinforcement for most concrete structures, mainly due to the fact that a thorough investigation of the potentialities and possibilities of welded wire fabric has not as yet been conducted. It is expected that the data collected in this investigation coupled with data collected in similar investigations performed at the Missouri School of Mines and Metallurgy will furnish the basis for a structural and economic comparison between welded wire fabric and ordinary reinforcing bars. The …

Aerodynamic Research For An Improved Rotor Control System On Helicopters, Delmar Wallace Breuer

Masters Theses

"Since the author has always been interested in Aeronautical Engineering, and in particular, rotary-winged-aircraft, the problem of research for aerodynamic improvement of rotary-wing control systems was chosen. This problem was suggested by the Army Aircorps Officials of Wright-Patterson Field of Dayton, Ohio as being a valuable and practical problem for the government. It is also valuable and practical for the author since it follows his general course of undergraduate study and since it fits closely into the field for which he is preparing himself...The requirement with which the author is most concerned is the design system for the producing of …

The Barite Industry In The United States, James Byron Chaney

Masters Theses

"Within the past few years, barite has become one of the most important non-metallic substance mined in the United States, as expressed by the large increase in production since 1943. The purpose of this treatise is to combine in a single volume important information concerning the geographical distribution, geology, mining methods, milling or beneficiation methods, production and utilization of barite in the United States. A large number of references has been used in preparing this treatment. The information has, as far as possible, been brought up-to-date. It is thought by the writer that the paper will present to the reader …

Preparation Of Copper Single Crystals By Means Of Powder Metallurgy Methods, Wei-Kung Chang

Masters Theses

"Since different mechanical properties of metals result from different grain size became known, the metallurgists have been interested in finding out the true nature of the grain boundaries. Consequently, several different theories concerning the mechanism of recrystallization, grain growth, and the structure of metals were advanced and studied. These threw much light on the difference of properties between polycrystalline metals and single crystals of the same metals. The single crystals of metals were studied because they enabled the investigator to determine the important points of metallic behavior. The first work on single crystals was rather obscure and limited to isolated, …

Design Of A Wind Tunnel For The Missouri School Of Mines And Metallurgy, William E. Speece

Masters Theses

"For some time there has been a need for a wind tunnel at the School of Mines for experimental work in the Civil and Mechanical Engineering Departments. With the expanding program and the possibility of establishing an Aeronautical Engineering School here, the need will be even more pronounced. So the problem will be of definite practical value. It was the original idea to design a small tunnel, build the tunnel, and to run a series of smoke tests on various structural models. However, after discussing the possibility of such a problem with school authorities, it was decided that if a …

Wetting Properties Of Enamel Glasses And Relation To Adherence, Chandrakant Chhotalal Shah

Masters Theses

"Various investigators have tried to find the cause of adherence of enamel glasses to iron metal and they have put forward different theories to explain this phenomena of adherence. In spite of much work done on adherence, no theory has generally been accepted to explain the function of adhering oxides like cobalt, nickel or manganese, etc., in sheet iron ground coats. In this investigation it was thought to find out whether adherence promoting oxides have any effect on the wetting abilities of enamel glasses at elevated temperatures or not, and further, whether this different wettability caused by the different adherence …

Water Injection In The Modern Automotive Spark Ignition Engine, Leonard Carl Nelson

Masters Theses

"The injection of water in the spark ignition engine is not new. The effect of humidity in the air on the performance of the spark ignition engine probably initiated the early investigations. The water vapor in the inlet air decreases the speed of the flame front and necessitates spark advance to assure maximum power and maximum efficiency. Water particles in the air evaporate during the compression and combustion of the inducted charge and decrease the tendency of the engine to detonate. These effects are very evident when operating the spark ignition engine in a moist atmosphere. Water is not a …

Effect Of Titanium Dioxide As A Mineralizer In Silica Brick, Henry Clay Brassfield

Masters Theses

"The magnitude of the thermal expansion of silica brick and its inability to withstand rapid temperature changes gives rise to problems of considerable importance in the manufacture of silica brick. In firing the silica brick, mineralogical changes occur in the quartzite from which the brick is made, in which minerals of lower specific gravity are formed. This results in a permanent expansion of the brick. These mineralogical changes have been thoroughly studied and considerable information is known on the different forms of silica produced at the higher temperatures. If the conditions of firing are such that these changes have progressed …

Evaluation Of Quenching Media Using The End-Quench Hardenability Test, Subodh C. Das Gupta

Masters Theses

"The purpose of the thesis was to evaluate the quenching speed of different quenching media by studying their behaviour in relation to hardenabilities of steels, using the standard A.S.T.M. End-quench Test. At the outset an understanding of the term "Hardenability", so extensively used in industrial heat-treatment, is necessary, The property of a steel, of hardening on quenching to various depths beneath the surface is referred to as the 'Hardenability". It may simply be called the "susceptibility to hardening". Hardenability should be distinguished from the "Hardening capacity", which represents the magnitude of the hardness achieved. The chief factors which affect the …

An Investigation Of The Production Of Multicarbide Of Tungsten And Titanium From Wo₃ - Tih₂ - C Mixtures, Chi-Mei Hsiao

Masters Theses

"The purpose of this research was to investigate the possibility of producing the multicarbides of tungsten and titanium from a tungsten oxide-titanium hydride-carbon mixture. It appears to be worthwhile to carry out the reduction, carburization, and pre-alloying in one process, i.e. reducing tungsten oxide with the dissociated hydrogen from titanium hydride and the added carbon; then carburizing the reduced tungsten metal and dissociated titanium metal; at last, pre-alloying the mixture of TiC and WC. The replacement of titanium hydride with titanium oxide seems to be more direct, simple, and economical process; but the difficulty in the reduction of titanium oxide …

Reduction Of Zinc Sulphide In A Vacuum, Tien-Shih Liu

Masters Theses

"The successful large scale commercial application of high vacuum for high temperature metallurgical operations is a comparatively new development. The use of Pidgeon and the carbothermic processes for the production of magnesium during the war forced a perfection of both equipments and techniques for high vacuum operations. This opens broadly the way for a great expansion of vacuum metallurgy. Vacuum operation is thus no more a laboratory method - it is a kind of industrial practice. Many metallurgical operations, which cannot be carried out by ordinary processes, are made feasible when conducted in a reduced pressure. typical examples are the …

Efficiency Of Various Types Of Reinforcement In Controlling Opening Of Cracks In Concrete Pavements, Frederick Richard Heartz

Masters Theses

"To date very little work has been done on the subject of the amount of crack opening for different loads on concrete pavement. It is a known fact that these cracks must be held together sufficiently to have aggregate interlocking action if the pavement is to transfer loads from one edge of a crack to the other. The maximum permissable [sic] opening has been set at .027 inches by the Highway Research Board. The author has attempted in this investigations (1) to determine the effect of different spacing and different sizes of longitudinal and transverse wires in controlling crack opening …

The Lithium Tungsten Bronzes, Shun Sheng Hsu

Masters Theses

"The 'tungsten bronzes are a series of anionic substitutional solid solutions of alkali or alkaline earth metal metatungstates and tungstic oxide. They are neither alloys or intermetallic compounds, the term "tungsten bronzes" was adopted because of their remarkable metallic properties -- e.g., high electrical conductivity, metallic luster on the crystal, and high specific gravity. Also owing to their intense and vivid colors and chemical inactivity it was possible to use them in the paint industry as a substitute for the so-called "bronze powders", the latter term is applied to the finely divided metal powders, such as aluminum, copper, brass, and …