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Articles 3511 - 3540 of 3655
Full-Text Articles in Physical Sciences and Mathematics
Induction Furnace Smelting Of Montana Chromite, Millard L. Reyner
Induction Furnace Smelting Of Montana Chromite, Millard L. Reyner
Bachelors Theses and Reports, 1928 - 1970
In 1939 the total world production of crude chromite was approximately 1,167,000 metric tons; of which the United States produced only 3,672 metric tons and imported over 317,500 metric tons. Imports came mostly from the Philippine Islands, Cuba, South Africa, and Rhodesia.
Testing And Concentration Of A Low Grade Gold Ore From Marysville, Montana, John B. White, Jr.
Testing And Concentration Of A Low Grade Gold Ore From Marysville, Montana, John B. White, Jr.
Bachelors Theses and Reports, 1928 - 1970
The purpose of this thesis was to investigate and attempt to concentrate low grade cyanided tailings rejected from the old Montana Mining and milling Company's mill situated 4 miles below the town of Marysville, Montana.
A Study Of The Dissolution Of Pyrolusite In Sulphuric Acid, John J. Worsdell
A Study Of The Dissolution Of Pyrolusite In Sulphuric Acid, John J. Worsdell
Bachelors Theses and Reports, 1928 - 1970
With an eye to the future development of its resources, the large deposits of low-grade manganese ore within Montana's boundaries show great promise of developing an important industry. With the present war demands and the possibility of a future market it is essential that work expended to utilize this important mineral.
Chromite Deposits Near Red Lodge And Silver Star, Montana, Edmond F. Smigel
Chromite Deposits Near Red Lodge And Silver Star, Montana, Edmond F. Smigel
Bachelors Theses and Reports, 1928 - 1970
The Red Lodge and Silver Star chromite deposits of Montana have stimulated much interest during periods of war. The Red Lodge deposit is 25 miles southwest of Red Lodge which is also the nearest railroad point. Several workings are scattered throughout the area, exposing lense-like ore bodies averaging 33% chrome oxide. Silver Star is a much smaller deposit 5 miles west of Silver Star, Montana, which is its nearest railroad point. Lenses of chromite are exposed by pits and trenches, which average approximately 36% chromic oxide.
The Beneficiation Of Montana Silver Star Chromite Ore, Edwin J. Bride
The Beneficiation Of Montana Silver Star Chromite Ore, Edwin J. Bride
Bachelors Theses and Reports, 1928 - 1970
It is known that there are large deposits of chromium ore in Stillwater and Carbon Counties in South-Central Montana. The late James F. Kemp of Columbia University, stated in 1928, that these were the largest chromium deposits in the United States and probably in the world, although they were not considered of commercial grade as compared with foreign ores.
An Investigation Of The Ores Of The Big Seven Mine, Neihart, Montana, Francis L. Wilson
An Investigation Of The Ores Of The Big Seven Mine, Neihart, Montana, Francis L. Wilson
Bachelors Theses and Reports, 1928 - 1970
During the course of this investigation of the ores of the Big Seven mine, Neihart, Montana, the writer has attempted, through a microscopic study of polished sections, to ascertain the hypogene or supergene character of the ore minerals present in the ore suite.
Geologic Field Mapping In An Area Eight Miles North Of Three Forks, Montana, H. E. Lillis
Geologic Field Mapping In An Area Eight Miles North Of Three Forks, Montana, H. E. Lillis
Bachelors Theses and Reports, 1928 - 1970
The Three Forks are includes parts of Jefferson, Madison, Broadwater Pond Gallatin counties, Montana. Sedimentary formations lie at the surface nearly everywhere in the area, and the rugged surface topography has been developed through the folding and tilting of these formations and their differential erosion.
Some Investigations On Quantitative Measurement Of Amalgamation, Charles Moore
Some Investigations On Quantitative Measurement Of Amalgamation, Charles Moore
Bachelors Theses and Reports, 1928 - 1970
Amalgamation is a process in which precious metals are collected by mercury. The exact way in which the mercury holds the other metals is not positively known. It is probable that a series of intermetallic compounds form. Very little work has been done so far on the theory of amalgamation.
Basic Information In The Granitic Rocks Of The Boulder Batholith, Clifford G. Sherwin
Basic Information In The Granitic Rocks Of The Boulder Batholith, Clifford G. Sherwin
Bachelors Theses and Reports, 1928 - 1970
Dark fine grained basic masses of rock are found in nearly every part of the Boulder Batholith, these commonly being referred to as inclusions, segregations, autoliths, and various other names. The origin, distribution, and composition of the dark inclusions form the basis for this report.
The Electrowinning Of Manganese From Rhodochrosite, Lloyd L. Thompson
The Electrowinning Of Manganese From Rhodochrosite, Lloyd L. Thompson
Bachelors Theses and Reports, 1928 - 1970
Manganese is commonly known to be a metal of great strategic importance. It is essential in the production of all steels, first as a scavenger to remove oxygen and sulfur, and second as an alloying element in wear-resistant steels.
Stratigraphy And Paleontology Of The Eagle Formation In Montana And Adjacent Areas, Raymond Thompson
Stratigraphy And Paleontology Of The Eagle Formation In Montana And Adjacent Areas, Raymond Thompson
Bachelors Theses and Reports, 1928 - 1970
A conspicuous two hundred and fifty foot sandstone of central Montana, known as the Eagle Formation, constitutes part of the some five thousand feet of Cretaceous sediments in the state. It stands out in steep cliffs which stretch for many miles in the outcrop area from Wyoming to Canada.
Some Chromite Deposits In Madison County, Montana, Russell H. W. Chadwick
Some Chromite Deposits In Madison County, Montana, Russell H. W. Chadwick
Bachelors Theses and Reports, 1928 - 1970
Chromite occurs in Madison County, Montana, in two areas, one three miles southwest of Silver Star, the other five miles southeast of Sheridan. The ore bodies are small, lenticular masses surrounded by metamorphosed sedimentary rocks of the pre-Cambrian Cherry Creek series. The ore was deposited from the hydrothermal solutions which serpentinized the surrounding metamorphic host rocks.
Some Preliminary Investiagtions Of The Magnetic Permeabilities Of Alloys Of The Ferromagnetic Metals, John H. Gambill Jr.
Some Preliminary Investiagtions Of The Magnetic Permeabilities Of Alloys Of The Ferromagnetic Metals, John H. Gambill Jr.
Bachelors Theses and Reports, 1928 - 1970
The problem presented for this thesis was an investigation of the magnetic properties of the alloys produced by the methods of powder metallurgy. The question behind this was the correlation of the magnetic properties with the bonding properties and with the diffusion of the constituents.
The Theory Of Alloy Deposition And The Effect Of A Rotating Cathode Upon Such Deposition, With Special Attention To The Possibility Of Depositing Sterling Silver, Kenneth J. Stodden
The Theory Of Alloy Deposition And The Effect Of A Rotating Cathode Upon Such Deposition, With Special Attention To The Possibility Of Depositing Sterling Silver, Kenneth J. Stodden
Bachelors Theses and Reports, 1928 - 1970
In the past few years a great deal of attention has been given to the electrodeposition of alloys. For the main part, this investigation has been of scientific interest only; but in a few instances, such work has attained commercial importance.
The Investigation Of Different Variables In The Assaying Of Silver Cyanide Solutions, Phillip L. Banfield
The Investigation Of Different Variables In The Assaying Of Silver Cyanide Solutions, Phillip L. Banfield
Bachelors Theses and Reports, 1928 - 1970
The cyanide method of extraction of gold and silver from their ores is extensively used in the United States and elsewhere. It is becoming increasingly more important in its use as the mining of lower grade deposits continues.
Some Effects Of The Addition Of Tellurium To Lead Alloys, Selim Ozsahin
Some Effects Of The Addition Of Tellurium To Lead Alloys, Selim Ozsahin
Bachelors Theses and Reports, 1928 - 1970
From the standpoint of its practical usefulness, the most important characteristics of metallic lead are its cheapness, resistance to corrosion, plasticity, high specific gravity, low melting point, and its ability to form alloys in which some properties are modified by the addition of other elements, while other properties remain the same.
The Extraction Of Chromate Salts From Montana Chromite, Server Tasdemiroglu
The Extraction Of Chromate Salts From Montana Chromite, Server Tasdemiroglu
Bachelors Theses and Reports, 1928 - 1970
In this thesis I have tried to determine the suitable temperature, time and the amount of soda ash and lime needed for the calcining process. The leaching and purification tests were studied experimentally. The earlier process for making chromate from chromite was not the same as is used today. Therefore I have found it useful to put into this thesis the newest method for making chromate salts and their important uses.
Measurements Of The Magnetic Permeabilities Of The Iron-Manganese Alloy System Prepared By The Methods Of Powder Metallurgy, O. Cihad Onbulak
Measurements Of The Magnetic Permeabilities Of The Iron-Manganese Alloy System Prepared By The Methods Of Powder Metallurgy, O. Cihad Onbulak
Bachelors Theses and Reports, 1928 - 1970
Powder metallurgy is a branch of metallurgy which produces metallic compacts in their final forms by means of pressure and heat-treatment from the powders. The products of powder metallurgy are being used in our daily lives quite often. For example, the tungsten wires in the electric bulbs to the silver-tin fillings of our teeth.
An Experimental Investigation Of The Age Hardening Of Copper With Manganese Silicide, Ali Kozak
An Experimental Investigation Of The Age Hardening Of Copper With Manganese Silicide, Ali Kozak
Bachelors Theses and Reports, 1928 - 1970
The subject of the thesis was based upon the theory of precipitation or age hardening of the copper by the compound formed by the Manganese and silicon present in the ternary Cu-Mn-Si alloy. The effect of the heat treatment to such an alloy was to be studied and the best aging time and temperature was to be determined.
The Electroformation Of Lithium-Lead Alloys From Molten Electrolytes, Thomas Prater
The Electroformation Of Lithium-Lead Alloys From Molten Electrolytes, Thomas Prater
Bachelors Theses and Reports, 1928 - 1970
An attempt was made to make lead-lithium alloys by electrodeposition of lithium using a molten bath and a molten lead cathode.The variables taken into consideration were: composition of the melt, temperature of the melt, and current density. The purpose of changing these factors was to determine what effect each had on the current efficiency.
Ground Water In The Lake Basin Field And Adjacent Area, Herman Neibauer
Ground Water In The Lake Basin Field And Adjacent Area, Herman Neibauer
Bachelors Theses and Reports, 1928 - 1970
This thesis consists of studying the stratigraphic and structural features of the Lake Basin Field and an adjacent area with special emphasis upon the ground water conditions present.
The Concentration Of Scheelite From The Gold Concentrates Of The Jardine Mining Company, John H. Huxley
The Concentration Of Scheelite From The Gold Concentrates Of The Jardine Mining Company, John H. Huxley
Bachelors Theses and Reports, 1928 - 1970
The Purpose of this thesis was to investigate the possibility of concentrating scheelite from Wilfley table gold concentrates from the mill of the Jardine Mining Company; and to determine whether such concentration is economically feasible and the product of sufficiently high grade to meet commercial specifications for such a product.
The Testing And Concentration Of Lake Chelan Copper Ore, Thor W. Johnson
The Testing And Concentration Of Lake Chelan Copper Ore, Thor W. Johnson
Bachelors Theses and Reports, 1928 - 1970
The geologic history of the Holden area and Lake Chelan district is an integral part of the history of the Cascade Mountain Range. The structure is very complex and the rocks, which have been subjected to intense metamorphic action, are portions of a roof pendant and consists of gneisses, schists and quartzites that are often difficult to correlate.
Relationships Of Manganese Minerals In The Butte District, Charles F. Parent
Relationships Of Manganese Minerals In The Butte District, Charles F. Parent
Bachelors Theses and Reports, 1928 - 1970
The use of manganese in the steel industry as a deoxidizing and desulfidizing agent makes it a necessity in modern industry, while the various alloy steels using manganese for the quality of toughness are also indispensable. Manganese is also used in the manufacture of such various articles as battery cells, paints and glass.
Gas Analysis By Absorption, Albert D. Mcmahon
Gas Analysis By Absorption, Albert D. Mcmahon
Bachelors Theses and Reports, 1928 - 1970
There is practically only one method of gas analysis. This was worked out many years ago by Bunsen, Hempel, and Winkler and consists in the successive absorption with different chemicals of the various constituents of the gas. The only improvement to this method is the oxidation and combustion of different components of a mixture followed by absorption.
Pegmatites In Southwestern Montana, Ora Rostad
Pegmatites In Southwestern Montana, Ora Rostad
Bachelors Theses and Reports, 1928 - 1970
Little has been written on pegmatites in Montana except in conjunction with reports on mining districts. This subject was chosen as a senior thesis to see what facts could be ascertained regarding pegmatites alone, and an attempt has been made by the writer to assemble all written material on pegmatites in southwestern Montana, and to study specimens from those that could be reached or from which specimens were available.
A Study Of The Concentration Of A Low-Grade Manganese Ore From The Ennis District, John B. Schuettenhelm
A Study Of The Concentration Of A Low-Grade Manganese Ore From The Ennis District, John B. Schuettenhelm
Bachelors Theses and Reports, 1928 - 1970
The purpose of the investigation was to determine the most effective means of concentrating the manganese in the ore. The study was that of identification of the minerals present. This showed the presence of oxides of manganese and iron, and carbonates of calcium and manganese. Methods of investigation were planned to determined whether the ore could be concentrated effectively by gravity concentration methods.
Oil And Gas Production Methods In Montana, Edgar A. Scholz
Oil And Gas Production Methods In Montana, Edgar A. Scholz
Bachelors Theses and Reports, 1928 - 1970
Montana's oil and gas industries aggregate a gross income of over 12,000,000 annually to the state. Oil and gas fields have been thoroughly discussed in literature as to geology, location, production and future possibilities. The specific object of this report has been to compile a comprehensive study of the production methods as they occur.
The Geology And Ore Deposits Of The Ermont Mines, James L. Kelly
The Geology And Ore Deposits Of The Ermont Mines, James L. Kelly
Bachelors Theses and Reports, 1928 - 1970
The Ermont Mines are located sixteen miles northwest of Dillon, Montana, in section 35 of T.6S., R.11W. This is in the central part of Beaverhead County. They are considered to be in the Argenta mining district, the town of Argenta lying three miles to the northeast.
A Study Of A Carbonaceous Gold Ore, James S. Huckaba
A Study Of A Carbonaceous Gold Ore, James S. Huckaba
Bachelors Theses and Reports, 1928 - 1970
The presence of graphite in the ore of the Missouri-McKee Mine has made its treatment by the methods now used quite unsatisfactory. The study was undertaken to develop a new flow sheet which would give a high recovery and yet be economical enough to handle low grade material.