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Articles 39571 - 39600 of 40195
Full-Text Articles in Physical Sciences and Mathematics
Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews
Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews
Bachelors Theses and Reports, 1928 - 1970
This thesis is concerned primarily with the production of metal powder compacts of iron and tin. In producing these compacts, the effects of processing variables on some of the essential properties of the pellets made were investigated.
Age Hardening Of Copper Antimony Alloys, William R. Stern
Age Hardening Of Copper Antimony Alloys, William R. Stern
Bachelors Theses and Reports, 1928 - 1970
A large number of alloys of varying percentages of copper and antimony were prepared. These alloys were treated in various ways which might be expected to produce age hardening. The effect of cold working was studied in the range where the alloys were malleable.
Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr.
Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr.
Bachelors Theses and Reports, 1928 - 1970
Although powder metallurgical methods have been used for years to fabricate tungsten and platinum, very little scientific data have been recorded until the beginning of this century. A large percentage of all commercial production at present is based upon past practice rather than upon scientific knowledge.
Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk
Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk
Bachelors Theses and Reports, 1928 - 1970
The original objective of this project was to determine the effect of varying current intensity and electrode coating composition upon the spatter losses and porosity of arc welds made by alternating current. This subject was suggested by the Welding Research Council of the Engineering Foundation, which is a clearing house for welding research in order to avoid duplication of work.
The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien
The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien
Bachelors Theses and Reports, 1928 - 1970
An electrodeposition of an iron-manganese alloy was made from the same conditions determined by previous research. Various addition agents were experimented with in an attempt to produce better conditions for electro-deposition. It was found advantageous to add small amounts of sodium lauryl sulfate and ammonium sulfite to the electrolyte.
An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry
An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry
Bachelors Theses and Reports, 1928 - 1970
Recent demands for petroleum to carry on the war effort have resulted in widespread prospecting in the northern Great Plains. Nearly all oil wells now drilled are of a depth to penetrate the marine Jurassic formations. It is known that these strata differ in thickness from place to place, but information of distribution, thickness, and lithology has not yet been compiled.
Aircraft Electronic Instrumentation, A. P. Upton
Aircraft Electronic Instrumentation, A. P. Upton
Journal of the Minnesota Academy of Science
No abstract provided.
Making Beats Visible, Carl J. Ulrich
Making Beats Visible, Carl J. Ulrich
Journal of the Minnesota Academy of Science
No abstract provided.
The Theory Of The Impulse Function For Oscillatory Mechanical And Electrical Systems, E. L. Hill
The Theory Of The Impulse Function For Oscillatory Mechanical And Electrical Systems, E. L. Hill
Journal of the Minnesota Academy of Science
No abstract provided.
Some Emission Phenomena Observed On Commercial Photocells, Zaboj V. Harvalik
Some Emission Phenomena Observed On Commercial Photocells, Zaboj V. Harvalik
Journal of the Minnesota Academy of Science
No abstract provided.
Electroplating Of Chromium Upon A Nickel Plated Magnesium Alloy, Harmel Dawson
Electroplating Of Chromium Upon A Nickel Plated Magnesium Alloy, Harmel Dawson
Bachelors Theses and Reports, 1928 - 1970
A nickel plating operation for magnesium alloys was investigated and proved successful in plating a small sample of a typical commercial magnesium alloy, Dowmetal J1.
Flotation Of A Complex Sulphide Ore Containing Tetrahedrite, James C. O'Dea, Lorimer W. Hoar
Flotation Of A Complex Sulphide Ore Containing Tetrahedrite, James C. O'Dea, Lorimer W. Hoar
Bachelors Theses and Reports, 1928 - 1970
The ore investigated in this thesis is a zinc-copper-lead ore. Microscopic analysis of this complex sulphide ore showed it to contain pyrite, sphalerite, arsenopyrite, galena, chalcopyrite, tetrahedrite, and covellite, with quartz as the gangue constituent.
The Electrodeposition Of Chromium From Trivalent Salt Solutions, Bahri Ersoz
The Electrodeposition Of Chromium From Trivalent Salt Solutions, Bahri Ersoz
Bachelors Theses and Reports, 1928 - 1970
The enormous number of previous experiments and researches for the improvement of the commercial chromic acid bath, did not succeed even in the partial elimination of any one of the disadvantages of chromic acid bath. This led the author to believe that the poor performance is an inherent quality of the chromic acid bath, and is due to the fact that the deposition occurs from the higher state of oxidation.
Bright Electroplating Of Copper In The Acid Bath, Elwood K. Jensen
Bright Electroplating Of Copper In The Acid Bath, Elwood K. Jensen
Bachelors Theses and Reports, 1928 - 1970
Plating of various objects with mirror-like surfaces of chromium, nickel, and other metals has expanded considerably during the past decade, and now ranks as an important enterprise, particularly with respect to the automotive industry.
The Effect Of Boron On The Hardenability Of Steel, William J. Foy
The Effect Of Boron On The Hardenability Of Steel, William J. Foy
Bachelors Theses and Reports, 1928 - 1970
Many attempts have been made to improve iron and steel and their alloys by the addition of boron. The results obtained were not encouraging for the reason that the amount of boron used, generally from 0.2 to 2.0 per cent is altogether too high. This percentage of boron renders the product hard and brittle and of late the experiments with boron in this connection have been practically abandoned.
An Attempt To Increase The Permeability And Porosity Of The Cut Bank Oil Sand By Treatment With Various Reagents, Donald H. Johnson
An Attempt To Increase The Permeability And Porosity Of The Cut Bank Oil Sand By Treatment With Various Reagents, Donald H. Johnson
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation was to attempt to find some means of increasing the effective porosity and permeability of the producing sands of the Cut Bank Oil Field, with the hope that thereby the ultimate recovery of petroleum from this field may be increased. Although the percentage increase in production thus effected would undoubtedly be small, it would represent a substantial volume of petroleum in view of the great quantity of oil and gas present in this field.
Geology And Occurence Of Graphite At The Crystal Graphite Mine Near Dillon, Montana, Charles K.W. Hum Hum
Geology And Occurence Of Graphite At The Crystal Graphite Mine Near Dillon, Montana, Charles K.W. Hum Hum
Bachelors Theses and Reports, 1928 - 1970
The problem to be considered embraces the mineralogy and the mode of formation of a very pure and vein-like deposit of crystalline graphite. This deposit is of more than ordinary interest because in its geological relations and in the character of its graphite it shows many similarities to the famous deposits of Ceylon.
Electrolytic Manganese From Aqueous Sodium Manganate Solution, William F. Sullaway
Electrolytic Manganese From Aqueous Sodium Manganate Solution, William F. Sullaway
Bachelors Theses and Reports, 1928 - 1970
The contents of this paper represent attempts to deposit the metal, manganese from sodium manganate solutions. The source of manganese was limited to the nodulized product from roasting rhodochrosite and was therefore chiefly manganese oxide.
Electrolytic Deposition Of Iron, Irving M. Kenoffel
Electrolytic Deposition Of Iron, Irving M. Kenoffel
Bachelors Theses and Reports, 1928 - 1970
In this thesis the purpose was to obtain a good iron deposit from a relatively simple bath. The deposit was to be of good nature and low in Carbon content. Also included is a summary of the uses to which electrolytic iron can be put as well as a summary of work done by other researchers in depositing iron electrolytically.
Spectrographic Analysis Of Montana Limestones, Clifford A. Barkell
Spectrographic Analysis Of Montana Limestones, Clifford A. Barkell
Bachelors Theses and Reports, 1928 - 1970
Spectrographic analysis of limestones as a possible method of correlation of geologic formations is an altogether new line of investigation. As far as known the only previous work consists of a few analyses made by Fred Lines in his bachelor thesis work at Montana School of mines in the spring of 1942.
Concentration By Flotation Of A Complex Galena - Sphalerite - Chalcopyrite Ore From The Nine Mile District Near Missoula, Montana, Truxton J. Fisher, John L. Tokich
Concentration By Flotation Of A Complex Galena - Sphalerite - Chalcopyrite Ore From The Nine Mile District Near Missoula, Montana, Truxton J. Fisher, John L. Tokich
Bachelors Theses and Reports, 1928 - 1970
At the present time ore bodies being mined are becoming more and more complex in mineral association, thus presenting a more difficult problem in their concentration. Lead-zinc sulphide ores are among the more common ores which present such difficulties.
Permeability And Porosity Studies Of The Cut Bank Oil Sand, Wesley Edward Davis
Permeability And Porosity Studies Of The Cut Bank Oil Sand, Wesley Edward Davis
Bachelors Theses and Reports, 1928 - 1970
In studying the Cut Bank field and its numerous wells, it is found that dry holes are surrounded by producing wells, and also that the field as a whole is very irregular; water, oil, and gas zones in many cases following no definite pattern. In some instances, this phenomenon may be due to the lensing and thinning of the producing sands, but it is evident that this is not the only factor. Therefore, the controlling factors must be porosity and permeability.
Zinc Plating Magnesium, Howard Wilbur Adam
Zinc Plating Magnesium, Howard Wilbur Adam
Bachelors Theses and Reports, 1928 - 1970
Magnesium and magnesium alloys are becoming more and more important in modern industry. Their use in the aviation industry has been greatly curtailed because of their comparatively poor resistance to corrosion especially in moist atmospheres. Many methods have been adopted to improve their resistance to corrosion.
The Electrodeposition Of Iron-Manganese Alloys, Earl C. Roberts
The Electrodeposition Of Iron-Manganese Alloys, Earl C. Roberts
Bachelors Theses and Reports, 1928 - 1970
Various electrolytes were experimented with in an attempt to deposit an iron-manganese alloy. An Alloy was obtained from a solution containing ferrous ammonium sulfate, manganous sulfate, and ammonium sulfate. Further experimentation was done in an effort to determine the optimum conditions of deposition and the highest manganese alloy which could be produced.
Coal In Montana, Clifford A. Barkell
Coal In Montana, Clifford A. Barkell
Bachelors Theses and Reports, 1928 - 1970
Coal was first mined in Montana in the year 1880. For the last thirty years the mining of coal in this state has been very important-with few people realizing its value. In the mineral industry, the value of the annual production of coal is exceeded by none of the non-metallics, and only by gold, silver, and copper in the metallics. At the present time the coal production of Montana is valued at about 41000,000.00 annually.
Report Of Investigation On The Physical Characteristics Of The Oil Sands From The Cut Bank Field, Montana, V. E. Hanes
Report Of Investigation On The Physical Characteristics Of The Oil Sands From The Cut Bank Field, Montana, V. E. Hanes
Bachelors Theses and Reports, 1928 - 1970
The purpose of this research was to study the physical characteristics, mainly, porosity and permeability of the oil sands from the Cut Bank field, Glacier County, Montana. In so doing, a better understanding of the relationship of these physical characteristics to one another and to the pool itself could be obtained.
Refining Of Low Grade Zinc-Gold Precipitates, John C. Stentz
Refining Of Low Grade Zinc-Gold Precipitates, John C. Stentz
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation was to ascertain if advantage could be taken of the copper in the precipitates as a collecting agent of the precious metals in the direct smelting furnace.The products produced to be low grade anode bullion and a slag low in precious metals, high in zinc and lead.
Upper Mississippian Faunas Of Western Montana, James King
Upper Mississippian Faunas Of Western Montana, James King
Bachelors Theses and Reports, 1928 - 1970
The author has made a study of an assemblage of fossils from the Blacktail Range near Dillon Montana with the purpose in view of attempting a correlation of that group with the fauna of the Big Snowy Group. Fossils have also been obtained from a limestone formation in northwestern Montana and from four different areas in the Amsden formation in central and western Montana.
The Velocity Of Falling Particles In A Liquid Medium, Elliott Coldwater
The Velocity Of Falling Particles In A Liquid Medium, Elliott Coldwater
Bachelors Theses and Reports, 1928 - 1970
The investigation was prompted by the fact that there seemed to be some discrepancy between the results published by Richards,and the empirical figures used in classification and in gravity concentration. Further, the work of Richards was restricted to quartz and galena whereas this study also includes pyrite and calcite.
Age Hardening Of Copper-Aluminum Alloy Castings, Frank Randall
Age Hardening Of Copper-Aluminum Alloy Castings, Frank Randall
Bachelors Theses and Reports, 1928 - 1970
Age hardening occurs in alloys of the solid solution type containing a hardening constituent, be it metal or metallic compound, which is more soluble in the solvent phase at higher temperatures than at lower ones.