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Studies Of Contact Angles On Oxidized Copper Minerals, John Stewart Carr

Masters Theses

"Effective flotation of an ore is the result of several factors: selection of suitable reagents; the proper combination of reagents, processing conditions of the operation proper such as time intervals involved and the machinery used. To focus the investigation on a specific field it was decided to investigate in some detail the behaviour of the more popular collectors toward oxidized copper minerals. This investigation was carried out chiefly by applying contact-angle measurements as obtained with the various collectors on the basic carbonate and oxide copper minerals. This basic information was desirable before carrying out actual flotation tests. There was little …

Hysteresis Loss Of Supermalloy At Different Temperatures, Chester Ray Holland

Masters Theses

"The object of this investigation was to measure the hysteresis loss of supermalloy at different temperatures, and to see if temperature had any effect on hysteresis loss and permeability. The maximum magnetizing current was held constant for all temperatures"--Introduction, page 1.

The Determination Of The Surface Tension Of Benzyl Ether, Sze-Kwei Min

Masters Theses

"The accurate determination of surface tension is of importance in the investigation of theories of surface structure, the structure of liquids, molecular cohesion, in the study of colloids, especially in physiological work, and in various lines of technical chemistry. The two methods most commonly used for determining surface tension are the capillary rise method and the drop weight method. The theory of the former is simple, but its technique is difficult. Its use in some cases is the cause of errors as high as 30%, due to its inapplicability to certain classes of substance, and is much more sensitive to …

Radioactivity Of The Pre-Cambrian Section Of The Bourbon, Missouri, Well Core By Measurement Of The Total Hard Gamma Radiation, Paul E. Damon

Masters Theses

"In December of 1947 Mr. Robert Van Nostrand and the writer became interested in the problem of the distribution of natural radioactivity and the applications of radioactivity to geology. A cooperative survey of the literature on the subject was undertaken. Later the writer decided to follow up the survey with a research project. Consultations with Dr. Z. V. Harvalik of the Missouri School of Mines Physics Department, and Dr. E. L. Clark and Mr. O. M. Bishop of the Missouri Geological Survey, followed. The nature of the project was evolved when Dr. Clark, with the consent of the U. S. …

Development Of A Proposed Course Of Study In American History For The Senior High School, Floyd Gagnon

Masters Theses

Chapter I

Introduction

I. Importance and Statement of the Problem

During the past fifty years secondary schools have made rapid advances both in enrollments and in the curriculum. In 1890 these schools were still the schools of the few, even though their enrollments had begun to grow rapidly. The high schools have continued their rapid growth until today today they present an extremely wide range of individual differences in such areas as interests, abilities and needs. Of the millions of students attending these schools today, probably six out of every seven will never attend college. It is thus apparent that …

Development Of A Program Of Art For Grades Four Through Six, Julia Eloise Oliver

Masters Theses

Chapter I

Introduction

Art in the elementary school encompasses all the fields of creative expression. There should be equal emphasis on dancing, music, poetry, drama, writing, painting, construction, and the crafts. Although these forms are usually worked with separately, the underlying purpose should always be the development of the children's creative power and not the perfection of any separate skill.¹

Effect Of Chromium, Molybdenum, Tungsten, And Vanadium Additions On The Physical Properties Of 1.4 Percent Titanium-Copper, Edward Palmer Patterson

Masters Theses

"Titanium, an element reported to be ninth most abundant of the elements in the earth's crust, has received very little experimental attention as an alloying element in non-ferrous metallurgy. In copper, titanium produces an age-hardening effect, which makes it of great value to copper manufacturers of fabricated products. Yet, but a handfull of men have investigated the copper-titanium equilibrium diagram, and the titanium rich portion of the diagram still remains a mystery. No work has been done on ternary alloys of copper-titanium to this date, as far as recorded information is concerned, and it is hoped that the present work …

The Effect Of Temperature On Mine Rocks, James Wilson Snider

Masters Theses

"The problem of this investigation involves the determination of the coefficients of thermal expansion of mine rocks, and the relationship of porosity, permeability, and consecutive temperature changes to the permanent elongation of those rocks. One of the major problems in mining today is that of the analysis of the action of exposed mine rock under changes of temperature. The immediate cause of a fall of ground in a mining excavation is due to the fact that some part of the mass that falls has been subjected to a stress beyond the strength of the rock. The question arises as to …

A Comparison Of The Use Of Polaroid And Colored Filters In The Multiplex Aeroprojector, Robert Greig Livingston

Masters Theses

"The purpose of this thesis is the drawing of a comparison between the use of the colored filters, which are normally employed in the multiplex aeroprojector by various mapping agencies throughout the country, and the use therein of Polaroid filters. The filters in the aeroprojector serve to break the projection of a stereoscopic pair of photographs into two impressions which are viewed separately by each eye of the observer, thus providing the main requirement for the observance of a three-dimensional effect. this stereoscopic effect is utilized in the multiplex plotting machine for the delineation of contours...In order to form a …

Geology Of The Einstein-Apex Tungsten Mine Area, Joel B. Pomerene

Masters Theses

"The geological problem existing in the Silver Mine area, the relationship of mineralization to structure, particularly to faulting and jointing, was pointed out to the writer by Prof. O. R. Grawe. Several geologists have made reconnaisance [sic] surveys of the whole region, but so far no detailed geologic map has been published of the immediate area. Prof. Grawe pointed out that such a map would be of value in the better understanding of the area and would be especially useful in the event that another national emergency required the development of all possible sources of tungsten"--Introduction, Selection of the Problem, …

Performance Study Of Mechanical Loading Machines In Coal Mining Practice, Kor Uyetake

Masters Theses

"In the transition from hand-loading methods in coal mining to mechanical loading methods various types of equipment have been developed to do the same job. Among the coal mining operators and among miners in the coal fields, various equipment preferences have developed. This produces a sharp difference of opinion. emotional statements of such ideas based upon personal likings do not contribute materially to coal mining progress - it merely serves to confuse the issue. The author feels that the opinions on the loading equipment should be based upon some factual data rather than the preconceived idea. Often it is difficult …

Ceramic Possibilities Of Some Missouri Clays And Shales, Leonard Nathanael Larson

Masters Theses

"Although many of the shales and clays of Missouri have in the past been, or are presently being used for the manufacture of heavy clay products such as face brick, common brick, sewer pipe, and tile, there is in these post-war years a significant shortage of these products within the state and country. Especially in the northwestern part of Missouri is there a distinct shortage, as only one structural clay plant is known to be operating in that area. The St. Louis and Southeastern Missouri districts are better prepared to meet construction demands, with several structural clay plants operating at …

Some Preliminary Work On Metaphosphates In Ceramics, John Frederick Burst

Masters Theses

"For a good many years the accepted method of cementing ceramic joints was with a mixture of fire clay grog and a plastic clay binder. This did not prove too satisfactory for several reasons. Usually when enough plastic clay was added to give good workability the vitrification was lowered to such an extent that either excessive shrinkage or excessive bloating occurred, depending upon the extent to which the vitrification point was exceeded...In order to obtain a cement with high strength throughout a long firing range the manufacturers have turned to the addition of various organic binders and inorganic fluxes. Most …

Effect Of Chromium, Molybdenum, Tungsten, And Vanadium Additions On The Physical Properties Of 1.4 Percent Titanium-Copper, Edward Palmer Patterson

Masters Theses

"Titanium, an element reported to be ninth most abundant of the elements in the earth's crust, has received very little experimental attention as an alloying element in non-ferrous metallurgy. In copper, titanium produces an age-hardening effect, which makes it of great value to copper manufacturers of fabricated products. Yet, but a handfull of men have investigated the copper-titanium equilibrium diagram, and the titanium rich portion of the diagram still remains a mystery. No work has been done on ternary alloys of copper-titanium to this date, as far as recorded information is concerned, and it is hoped that the present work …

Study Of The Method Of Geometric Mean Distances Used In Inductance Calculations, Harold Lockwood Seneff

Masters Theses

"The object of this thesis is to study the method of geometric mean distances as applied in the calculation of inductances of transmission line conductors and of multicircuit transmission lines. The thesis will consist of: (a) the derivation of some of the basic theorems and equations to be used, (b) the use of these theorems and equations in calculating the geometric mean distances of different transmission line conductors, and (c) practical application of geometric mean distances applied in the calculation of equivalent inductance of multicircuit transmission lines. The method of geometric mean distances as applied to individual conductors of single …

Ceramic Properties Of The Clays Of The Polo Gas Field, Clarence Arthur Lambelet

Masters Theses

"In Western and Northwestern Missouri there exist many natural gas fields of such limited size and of such great dispersion that it is not economical to utilize their products by the construction of pipe lines to consuming centers. Thus a large source of natural wealth is lying idle. This wealth could be utilized, however, if some manufacturing process requiring large amounts of fuel were located in the vicinity...The availability of fuel is the reason for interest in the area, though an investigation should be made to assure the quality and quantity of the fuel in any selected area. the adequacy …

The Mechanical Properties Of Mine Rocks And A Standardized Test Procedure For Their Determination, Walter Edwin Lewis

Masters Theses

"The problem involves studies of the mechanical properties of rocks and was undertaken in an attempt to determine practical data that will help in estimating the supports required to maintain the roofs of mines during and after mining operations. One of the most important problems in mining today is that of the analysis of the action of mine-rock under stresses. From such an analysis in any given mining venture it should be possible to obtain cheaper methods of mining because the supports necessary to maintain the walls and roof of an excavation may be determined on the basis of how …

A Study Of The Separation Of Feldspar From Missouri Granite, Vernon Louis Kasten

Masters Theses

"The greatest use of feldspar is as a flux in the Ceramic Industry where it is used in the manufacture of abrasives, floor tile, terra cotta, china, and earthenware of all types. It is also used in the manufacture of glass and enamels, and much is used as grinding medium in powdered form because it is softer than the common abrasive, quartz...Missouri Granites are composed of feldspar, quartz, mica, and other materials, which may or may not occur in all the samples. It is the purpose of this investigation to attempt a separation of the feldspar from these other components …

The Analysis, Evaluation, And Selection Of American History Textbooks For Senior High School Classroom Use, Fred A. Weiss

Masters Theses

Chapter I

The Purpose and Procedure of this Study

Introduction

American history has long held a well-established place in the curriculum of the senior high schools of the United States. In many schools every pupil is required to take American history in order to be eligible to graduate from high school. If American history is not included as a specific subject offered in the curriculum of a senior high school, then one may expect to find it incorporated into some other part of the curriculum, perhaps into a general social studies course.

A Study Of Methods For The Purification And The Removal Of Color From Trinitrotoluene Wash Waters, William Wilson

Masters Theses

"Symmetrical Trinitrotoluene is stable in the presence of moisture, but the nonsymmetrical trinitrotoluenes permit replacement of a nitro group with the formation of a nitrated cresol and nitrous acid. Nitrated cresols form salts similar to the picrates. To avoid these nonsymmetrical trinitrotoluenes the Ordinance Department, U. S. A., requires that Grade I trinitrotoluene have a solidification point of at least 80.2⁰C.². Numerous methods for purifying the crude trinitrotoluene and others for separating the nitrotoluenes have been suggested"--Introduction, page 1.

Studies On The Quantitative Analysis Of Rhenium And Its Occurrence In The Products Of Molybdenite Processing, Walter Keith Dean

Masters Theses

"There is at the present time no commercially developed source of the metal rhenium in the United States. Since this metal is known to exist in molybdenite, it was felt that a study of the products of the metallurgical processing of this mineral might reveal a source of rhenium that could e developed. The Climax Molybdenum Co. provided a number of samples from their smelter at Langloth, Pennsylvania. Although an improved method for the quantitative estimation of rhenium was recently published, its accuracy was not high and the procedure exacting and time-consuming. These combined factors led to the selection of …

Constitution And Properties Of Manganese-Copper Alloys, James Harrison Jacobs

Masters Theses

"This work was undertaken because of the recently revived interest in the use of manganese as an alloying element. This revival of interest has been mainly due to the development of the process for electro-deposition of manganese by the U. S. Bureau of Mines. Prior to the work of the bureau of Mines there was no commercial source of high purity manganese. Manganese made by the electrolytic process contains less than .03% impurities, while manganese made by other methods contains as high as 3% impurities. The use of high purity manganese as a base for alloys should open up an …

The Volumetric Determination Of Alumina In Clays And Related Materials, David Ferdinand Boltz

Masters Theses

"The primary purpose of this thesis was to develop a direct method for the determination of alumina in certain silicates. The classical gravimetric procedure for the analysis of alumina in clays and related materials has often been regarded as being too lengthy and troublesome, especially when only the percentage of alumina was desired. The correct determination of alumina is undoubtedly one of the most unsatisfactory of the chemical constituents of siliceous materials, and therefore the development of a direct volumetric method for the determination of this constituent was made the main objective of this research, page [1].

Absorption Of Carbon Dioxide In A Bubble Plate Tower, William Arthur Enderson

Masters Theses

"Gas absorption, one of the chief operations of chemical engineering, has occupied investigators for a long time. Results of many experiments on the general subject of gas absorption has been published. However, relatively few data have appeared in the literature on the use of bubble cap towers for gas absorption although they constitute one of the three major classifications of absorption equipment. Bubble cap towers are used extensively in the petroleum industry. More performance data would increase the versatility of existing equipment"--Introduction, page 1.

The Effect Of Addition Agents In Grinding Portland Cement Clinker, Eugene Farrell Hill

Masters Theses

"In the dry grinding of most materials in a ball mill or similar apparatus, a degree of fineness is eventually reached when a noticeable decrease in the efficiency of grinding occurs. The degree of fineness where this phenomenon occurs, as measured by the specific surface of the material being ground, varies greatly with different materials. The accompanying effect in all cases, however, is the formation of a coating upon the balls; this coating in the case of cement adheres tightly to the balls and increases in thickness as grinding progresses after the initial "coating' fineness has been reached. Usually an …

Design Study Of A Three Span Continuous Tied-Arch Bridge, George Perry Steen

Masters Theses

"In this study of the continuous tied-arch bridge, having one main span and two equal side-spans, the following items are endeavored: (1) To set up the total internal work equations and to find the values of the unknown forces or redundants. (2) To compute to maximum moments for design and to complete the design of the super-structure for one bridge. Details, such as the gusset plates, rivets, connection angles, etc., are not designed; the effect of such being allowed in the design for dead load as a certain per cent for details. (3) To set up hypothetical conditions for other …

A Comparison Of Methods For The Determination Of Iron In Clays And Related Ceramic Materials, Hoyt Gillum Thompson

Masters Theses

"Iron is always present in clay and ceramic products. This element has a definite effect upon the properties of substances containing it, hence it is important for the ceramist to know the exact amount of this element present in a ceramic material. Many methods have been devised for the precise determination of iron, both in large and small amounts. Of the many methods used, the American Society for Testing Materials has listed only two for the examination of clays, refractories, and similar material...However the amounts of iron for which these methods are most suitable are not given. Nor does the …

The Sorption Of Metallic Ions By Wood Pulp During Purification, Harold Edgar Boyd

Masters Theses

"The cost of producing cellulose acetate, and the difficulties attending its dissolving, plasticizing, and application to specific uses are problems which must be investigated before the ultimate commercial development of the material can be realized. The price of the cellulose used as raw material for acetylation is one of the primary factors influencing the cost of the finished product. At present, cotton linters constitutes the chief practical souce [sic] of acetate, being almost pure alpha-cellulose, and cheaper than staple cotton, our other source of high alpha-cellulose, Wood pulp is the only other material offering promise as a substitute for cotton, …

An Acoustical Investigation Of Parker Hall Auditorium At The School Of Mines And Metallurgy Of The University Of Missouri, John Douglas Martin

Masters Theses

"The auditorium in Parker Hall on the Missouri School of Mines campus has been noted locally for its poor auditory characteristics. At times in the past corrective treatment has been considered but no detailed or experimental data were gathered. In September of 1934 the writer was detailed under an FERA project to study the room and to determine the best method of correction"--Introduction, page 1.

Steric Hindrance In The Ketonic Splitting Of Substituted Acetoacetic Ester, Claude Stanley Abshier

Masters Theses

"The phenomenon of steric hindrance has been observed and investigated in a variety of reactions, most of which have been with aromatic compounds. In this branch of study the speeds of reaction of ethyl acetoacetate, α-mono-methyl-ethyl-acetoacetate, α-mono-ethyl-ethyl-acetoacetate, α-mono-propyl-ethyl-acetoacetate in the presence of 0.05 and 0.10 normal hydrochloric acids have been investigated at temperatures between 60⁰C. and 90⁰C. An attempt has been made to explain the results obtained"--Introduction, page 1.