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Articles 18391 - 18420 of 19215
Full-Text Articles in Entire DC Network
The Missouri Miner, April 30, 1947
The Missouri Miner, April 09, 1947
The Missouri Miner, March 26, 1947
The Missouri Miner, March 19, 1947
The Missouri Miner, February 26, 1947
The Missouri Miner, February 26, 1947
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, February 05, 1947
The Missouri Miner, February 05, 1947
The Missouri Miner Newspaper
No abstract provided.
Further Studies On The Effect Of Grinding Aids For Portland Cement Clinker, Charles Lee Rakestraw
Further Studies On The Effect Of Grinding Aids For Portland Cement Clinker, Charles Lee Rakestraw
Masters Theses
"In the dry grinding of cement clinker to a fine powder in which for example ninety percent or more of the particles are reduced to a fineness below that of a 200 mesh screen, it has been found that further fine grinding is extremely difficult and the energy input is out of all proportion to the further production of fine particles. This seems to be due to the fact that when the bulk of the material reaches this fineness there is a tendency of the finest particles to cling to each other and bunch or flocculate. Along with this tendency …
The Effect Of Temperature On Mine Rocks, James Wilson Snider
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 …
Some Preliminary Work On Metaphosphates In Ceramics, John Frederick Burst
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 …
An Investigation Of Various Properties Of The 60co-40cr Alloy, Roger David Moeller
An Investigation Of Various Properties Of The 60co-40cr Alloy, Roger David Moeller
Masters Theses
"The binary alloys of Co-Cr have had a few practical applications in our modern economy due to their high cost. The only extensive field of application has been developed in recent years in the manufacture of high temperature alloys for such equipment as gas turbines, jet engines, and turbo-superchargers. The use of these materials has been limited, due to their high cost, to small parts such as rotor blades in gas turbines. To reduce cost and to add desirable or eliminate undesirable properties, the binary alloys have, from the beginning, been modified with varying amounts of other metals. The modified …
The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay
The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay
Masters Theses
"The purpose of this thesis is to provide a means of preparing highly purified samples of neodymium and praseodymium compounds when the material to be refined already exists in a state of approximate purity. The method described cannot be profitably used to purify the individual rare earths without first concentrating them. The process is not intended to be quantitative, for it is a fractional crystallization technique using a concentrated hydrochloric acid medium"--Introduction, page 1.
The Rollamo 1947, The University Of Missouri School Of Mines And Metallurgy
The Rollamo 1947, The University Of Missouri School Of Mines And Metallurgy
Yearbooks
No abstract provided.
Effect Of Chromium, Molybdenum, Tungsten, And Vanadium Additions On The Physical Properties Of 1.4 Percent Titanium-Copper, Edward Palmer Patterson
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 …
Geology Of The Ozark-Martin Mine Area, Madison County, Missouri, William Clifton Hayes
Geology Of The Ozark-Martin Mine Area, Madison County, Missouri, William Clifton Hayes
Masters Theses
"General descriptions of the region adjacent to the Ozark and Martin Mines of Madison County, Missouri have been included in a number of early publications dealing with the Einstein Silver Mine area, but a detailed geologic map has not been made. It was thought that through detailed mapping and by a detailed analysis of all of the geologic features present, a more definite relationship between mineralization and structure might be determined"--Introduction, Purpose and Scope of Work, page 1.
Thermal Reduction Of Beryllium Chloride With Metallic Magnesium, Mailand R. Strunk
Thermal Reduction Of Beryllium Chloride With Metallic Magnesium, Mailand R. Strunk
Masters Theses
"The purpose of this research was to investigate the thermal reduction of beryllium chloride by metallic magnesium. Beryllium is a remarkable element, being characterized by its hardness, lightness and durability. Although the art of metallurgy has developed to a point at which most metals can be produced at a low cost, there are a few metals, of which beryllium is an outstanding example, which can only be obtained at high prices and in small amounts because of the difficulties of recovering the metals as such from their compounds which occur in nature. Small amounts of pure beryllium can be obtained, …
Ceramic Possibilities Of Some Missouri Clays And Shales, Leonard Nathanael Larson
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 …
An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break
An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break
Masters Theses
"There has been a need for a rapid and an accurate method for the determination of fluorine in its compounds. Both gravimetric and volumetric methods have been studied, but both methods were time consuming or inaccurate or both. Colorimetric methods had been studied before F. Richter developed his method but none had been reported to be as satisfactory as his method. This method was investigated because it was thought that F. Richter's method would be a satisfactory colorimetric determination for fluorine in its compounds"--Introduction, page 1.
A Comparison Of The Use Of Polaroid And Colored Filters In The Multiplex Aeroprojector, Robert Greig Livingston
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
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, …
The Effects Of Low Concentrations Of Sulphur Dioxide On Oxidized Manganese Ores At Elevated Temperatures, William Henry Magill
The Effects Of Low Concentrations Of Sulphur Dioxide On Oxidized Manganese Ores At Elevated Temperatures, William Henry Magill
Masters Theses
"Although there are large quantities of manganese ore in the United States, most of it is low-grade and cannot be used for the production of ferromanganese. Much government and private research has been done to concentrate the domestic low-grade ores but many problems have been encountered. A large number of treatments have been found necessary for ores from various sections of the country. Low-grade ores have been sulfated with sulfur dioxide in the gaseous state at elevated temperatures and the soluble manganous sulfate extracted with water. This gave a solution of manganous sulfate that may be used for the recovery …
The Missouri Miner, December 11, 1946
The Missouri Miner, December 11, 1946
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, November 27, 1946
The Missouri Miner, November 27, 1946
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, September 25, 1946
The Missouri Miner, September 25, 1946
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, July 24, 1946
The Missouri Miner, July 03, 1946
The Missouri Miner, June 26, 1946
The Missouri Miner, April 09, 1946
The Missouri Miner, March 26, 1946
The Missouri Miner, March 13, 1946 -- Special St. Pat's Edition
The Missouri Miner, March 13, 1946 -- Special St. Pat's Edition
The Missouri Miner Newspaper
No abstract provided.