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Articles 69331 - 69360 of 69928

Full-Text Articles in Physical Sciences and Mathematics

The Measurement Of Current Efficiency In Zinc Sulphate Electrolytes Containing Antimony And Cobalt By Hydrogen Evolution, Arthur R. Hard May 1940

The Measurement Of Current Efficiency In Zinc Sulphate Electrolytes Containing Antimony And Cobalt By Hydrogen Evolution, Arthur R. Hard

Bachelors Theses and Reports, 1928 - 1970

The measurement of current efficiency by hydrogen evolution is based on the assumption that the portion of the current which deposits no zinc will release hydrogen. This assumption is correct for solutions containing no impurities electropositive to zinc.


The Geology And Mineralogy Of The Independence Mining District, Alan Kuhlman May 1940

The Geology And Mineralogy Of The Independence Mining District, Alan Kuhlman

Bachelors Theses and Reports, 1928 - 1970

From 1888 until 1893 the district was a booming mining camp. Seven stamp mills were running and ore was be­ing mined from the Independence, King Solomon, Poorman, Golden, Hidden Treasure and Crown claims. The town of Independence, which was on the Boulder River at the fork of Basin Creek, boasted a population of 400 people.


A Study Of Metallic Eutectics, Robert P. Corbett May 1940

A Study Of Metallic Eutectics, Robert P. Corbett

Bachelors Theses and Reports, 1928 - 1970

All of the metals have definite melting points. When a metal is heated above the melting point, it exists as a liquid. Now if the melt is allowed to cool, it will solidify when a temperature corresponding to the melting point is reached.

However, if one metal is added to another metal, both of which are mutually soluble in the liquid state, a certain effect can be noted. The melt will not solid­ify when the melting point of the pure metal is reached, but will freeze at a lower temperature.


Areal Geology Of The Post-Paleozoic Surface Of The Northwest Plains, William M. Broderick May 1940

Areal Geology Of The Post-Paleozoic Surface Of The Northwest Plains, William M. Broderick

Bachelors Theses and Reports, 1928 - 1970

Probably most of the area included in this report has been ex­amined to some extent by oil geologists, and most, if not all, of the important domes have been discovered and surveyed thoroughly. In parts of the area, the bedrock is covered by glacial drift or alluvium materi­al, but it is reasonable to believe that no new domal structure will be found. This means that surface examination alone will be insufficient in locating new oil fields, so future prospecting will be dependent, to a great extent, on studies of sub-surface stratigraphy.


A Study Of The Concentration Of A Copper-Zinc Ore., Kenneth L. M. Dodd May 1940

A Study Of The Concentration Of A Copper-Zinc Ore., Kenneth L. M. Dodd

Bachelors Theses and Reports, 1928 - 1970

The ore under investigation in this thesis is a copper-zinc ore which came from the state of New Mexico. The exact location is unobtainable. The purpose of the investigation was to determine the most effective means of concentration of the valuable min­erals present in the ore.


The Testing And Concentration Of A Low Grade Copper-Nickel Ore., Laurence T. Eck May 1940

The Testing And Concentration Of A Low Grade Copper-Nickel Ore., Laurence T. Eck

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis is to investigate the possi­bility of concentrating a low grade copper-nickel ore, to determine the most effective method of concentration, and to attempt to draw some conclusions to determine whether or not the concentrates produced would be of sufficient high grade to make the recovery of nickel and copper a profit­able enterprise.


Geology And Ore Deposits Of The Jardine Mining District, Park County, Montana, Douglas M. Dowell May 1940

Geology And Ore Deposits Of The Jardine Mining District, Park County, Montana, Douglas M. Dowell

Bachelors Theses and Reports, 1928 - 1970

The Jardine Mining district is in the extreme southern part of Park County, Montana. Jardine is five and one-half miles northeast of Gardiner, Montana, the northern entrance to Yellowstone National Park.


The Electrolytic Recovery Of Copper And Zinc From Scrap Brass With Special Reference To Lead-Bearing Brass., Frederick A. Hames May 1940

The Electrolytic Recovery Of Copper And Zinc From Scrap Brass With Special Reference To Lead-Bearing Brass., Frederick A. Hames

Bachelors Theses and Reports, 1928 - 1970

Several methods have been investigated, with some success, for treating scrap brass to recover copper and zinc, either as pure metals or as salts of the metals. One of the more promising of these methods is electrolysis in sulfate solution for the recovery of pure copper and zinc.


Electrolysis Of Molten Mixtures Of Galena And Lead Chloride., Donald Q. Cole May 1940

Electrolysis Of Molten Mixtures Of Galena And Lead Chloride., Donald Q. Cole

Bachelors Theses and Reports, 1928 - 1970

Electrolysis of molten mixtures of lead chloride and galena was carried out under various conditions of temperature, time, composition, and current densities; without a diaphram, and with various diaphrams. Continuous runs, with necessary additions of lead sulfide and lead chloride to maintain a melt of the proper composition, were attempted on a small scale.


A Study Of The Effect Of Third Metals On The Wetting Properties Of Solders, William L. O'Brien May 1940

A Study Of The Effect Of Third Metals On The Wetting Properties Of Solders, William L. O'Brien

Bachelors Theses and Reports, 1928 - 1970

Solders are not new alloys, since they were known in late Roman times when they were mentioned by Pliny. These solders differed very little from our modern ones. Tertiarium, consisting of one part of tin to two parts of lead, is known today as plumbers solder; and argentarium, consisting of equal parts of lend and tin, is still extensively used for many purposes.


Geology And Ore Deposits Of The Clinton Mining District, James F. Piquette May 1940

Geology And Ore Deposits Of The Clinton Mining District, James F. Piquette

Bachelors Theses and Reports, 1928 - 1970

This report includes the results of geological investigation of the Clinton Mining District and the Hidden Treasure Mine.The Clinton Mining District is an unorganized mining dis­trict situated in the Garnet Range two and one-half miles northeast of the town of Clinton, Montana, which is on the Northern Pacific Railway and the Chicago, Milwaukee, St. Paul, and Pacific Railroad seventeen miles east of the city of Missoula.

The district is in the same range of mountains as the Gar­net Mining District and the drainage from the district covered is to the south into the Hell Gate or Clarks Fork of …


The Testing And Concentration Of A Tungsten Ore, Turdat S. Simone May 1940

The Testing And Concentration Of A Tungsten Ore, Turdat S. Simone

Bachelors Theses and Reports, 1928 - 1970

At the present time the principal uses for tungsten lie in the manufacture of ferro-alloys and tungsten steels. Due to it’s hardening and strengthening characteristics it holds an important position among steel hardening metals. The great rush for it’s production during the World War years clearly points to it’s importance in the manufacture of armament.


Report On The Ermont Mine Sec. 35, T. 6 S., R. 11 W., Beaverhead County, Montana, Chester Harkins Steele May 1940

Report On The Ermont Mine Sec. 35, T. 6 S., R. 11 W., Beaverhead County, Montana, Chester Harkins Steele

Bachelors Theses and Reports, 1928 - 1970

An examination of the Ermont Mine was requested by the owners, Messrs. J. R. Bowles and R. B. Caswell, to determine the amount and grade of ore developed, the advisability of constructing a mill at the present time, and to recommend future development work.


The Age-Hardening Of Magnesium With Aluminum And Zinc, K. Deatley Loughridge May 1940

The Age-Hardening Of Magnesium With Aluminum And Zinc, K. Deatley Loughridge

Bachelors Theses and Reports, 1928 - 1970

Magnesium is one of the most active elements and forms oxides, nitrides, and carbides, but not hydrides. Due to its activity, low melting point, low strength when unalloyed, and the difficulty with which it is worked, magnesium has not been and is not at present well developed.


A Study Of Eutectics Of Certain Fused Salts, William D. Trethewey May 1940

A Study Of Eutectics Of Certain Fused Salts, William D. Trethewey

Bachelors Theses and Reports, 1928 - 1970

Considerable work has been done investigating the freezing point curves of fused salts, but little has been written describing the appearance of their eutectic structures when observed under the microscope.


The Separation And Identification Of The Solid Linseed Oil Fatty Acids By Fractional Crystallization Of Acetone, Albert J. Schlaeger May 1940

The Separation And Identification Of The Solid Linseed Oil Fatty Acids By Fractional Crystallization Of Acetone, Albert J. Schlaeger

Bachelors’ Theses

It Is surprising to note in the literature that oils and fats like linseed, tung, tea seed, soya bean and other oils although employed in the arts for many centuries still have their exact composition unknown. The fatty acids composing most of our common fats and oils are recognized but many of their properties still remain to be known. Up to the lat fifteen years the examination of oils was concerned only with the purity of a sample and with crude methods only rough compositions were calculated.


The Effect Of Time, Temperature, And Pressure On The Hydrogenation Of Castor Oil, Anthony Toth May 1940

The Effect Of Time, Temperature, And Pressure On The Hydrogenation Of Castor Oil, Anthony Toth

Bachelors’ Theses

The intention of the author in doing this research was to obtain some data on the effect of time, temperature, and pressure on the hydrogenation of castor oil at 100°C. The author is also interested to see if a method could be devised by which the saturated and unsaturated fatty acids could be separated from the hydroxy acids of hydrogenated castor oil.


A Determination Of The Melting Points Of Binary Mixtures Of Halowax 1014 And Natural Waxes By The Dropping Pellet Method, Leslie Jones May 1940

A Determination Of The Melting Points Of Binary Mixtures Of Halowax 1014 And Natural Waxes By The Dropping Pellet Method, Leslie Jones

Bachelors’ Theses

The original intent of this thesis was twofold: First, to adapt the dropping pellet method of determining melting points to the determination of the melting points of various binary mixtures of Halowax 1014 and natural waxes. This work follows up the investigation of Kroening who used the ball and ring method of determining the melting points of mixtures of various Halowaxes and natural waxes. Second, to attempt to ascertain whether there are formed in these binary mixtures chemical compounds which would account for their peculiar behavior as regards melting points.


The Effect Of Alcohols On Paramecia, William C. Lawler May 1940

The Effect Of Alcohols On Paramecia, William C. Lawler

Bachelors’ Theses

A phenomenon of surpassing biological interest is the adjustment of living substance to its surroundings. That living things should so act as to promote their own welfare is indeed wonderful; that such acts are common is evident on every hand.


A Comparison Between Saponification And Iodine Values And Melting Point Curves For Mixtures Of Various Natural Waxes And Halowax 1012, William Kenneth Watts May 1940

A Comparison Between Saponification And Iodine Values And Melting Point Curves For Mixtures Of Various Natural Waxes And Halowax 1012, William Kenneth Watts

Bachelors’ Theses

This thesis 1s concerned with the nature of the action of the lowering of the melting point of the various natural waxes by the addition of Halowax. The problem was suggested by the work of Louis Kroening in his thesis, "The Effect of Halowax 1012, 1013, and 1014 on the Melting Points of the Various Waxes", and also by that of Joseph M. Sevenich in his thesis, "An Investigation of Halowaxes in Trinary Wax Mixtures". The former showed conclusively that the presence of Halowax in a wax mixture invariably lowered the melting point of the natural wax. The latter showed …


The Preparation Of Methyl, Ethyl, And Borneol Glucoside, Florence Margaret Berger May 1940

The Preparation Of Methyl, Ethyl, And Borneol Glucoside, Florence Margaret Berger

Bachelors’ Theses

The present research was undertaken to find methods suitable for the preparation of methyl, ethyl, and borneol glucoside. The problem was to prepare methyl, ethyl, and borneol glucoside, and to determine their con­stants in regard to the melting point and optical rotation. These results were then compared to the results obtained by Emil Fischer and J. Hamalaienen.


Spectroscopic And Quantitative Determination Of Platinum, John W. Manning Iii May 1940

Spectroscopic And Quantitative Determination Of Platinum, John W. Manning Iii

Chemistry Honors Papers

This 7 page thesis examines quantitative method and spectroscopic analysis of platinum.


A Study Of Fermat's Last Theorem., Jerome L. Krumpelman May 1940

A Study Of Fermat's Last Theorem., Jerome L. Krumpelman

Electronic Theses and Dissertations

This work is intended primarily for the student of mathematics who may not necessarily wish to delve into the complete theory of the problem. but who may wish to get a picture of the work necessary to study and understand it. For a complete history of the problem until 1919, refer to Chapter XXVI of Dickson's History of the Theory of Numbers, II, and for the work primarily connected with Irregular Cyclotomic Fields and Fermat's Last Theorem through part of 1927, refer to Algebraic Numbers, II, National Research Council Bulletin, # 62. For a Short presentation of the problem refer …


Historical Background And Settlement Of Baxter Springs, Kansas, Ruth Rodman St. Clair May 1940

Historical Background And Settlement Of Baxter Springs, Kansas, Ruth Rodman St. Clair

Electronic Theses & Dissertations

This is a study of the historical background and the settlement of Baxter Springs, which is located in the southeastern corner of Kansas, one mile from the Oklahoma line and six miles from the Missouri line. It was one of the first settlements in Cherokee County and the first frontier town near the southern boundary line of Kansas.

The town was named tor John L. Baxter who settled upon the present town site in 1849.

During the civil war, a military post for the Union Army was maintained at Baxter Springs. The principal engagement of the war, in this section …


An Attempt To Devise A Method For The Determination Of The Concentration Gradient In And Electrolyte Between Two Electrodes, Joseph J. Garvey Apr 1940

An Attempt To Devise A Method For The Determination Of The Concentration Gradient In And Electrolyte Between Two Electrodes, Joseph J. Garvey

Bachelors’ Theses

Nowhere in the literature of chemistry can there he found a practical method for the determination of the concentration changes in a solution when subjected to an electric current. It is the purpose of this thesis to devise a method for this determination.


The Existence Theorem Of Ordinary Differential Equations, Harris J. Dark Apr 1940

The Existence Theorem Of Ordinary Differential Equations, Harris J. Dark

Master's Theses

There are a great many devices for solving differential equations of certain special forms. But there is a large number of classes of differential equations that are not included in these special forms and cannot be integrated by quadratures or other purely elementary methods. When mathematicians were forced to abandon their cherished hope of finding a method for expressing the solution of every differential equation in terms of a finite number of known functions or their integrals they turned their attention to the question of whether a differential equation in general had a solution at all, and, if so, of …


Report On Pole Canyon Area And Area Three Miles Southeast Of Jefferson Island, Ted Newcombe Jan 1940

Report On Pole Canyon Area And Area Three Miles Southeast Of Jefferson Island, Ted Newcombe

Bachelors Theses and Reports, 1928 - 1970

The primary purpose of the trip was to acquaint the students with some of the problems that occur in the field, and also how to make geologic maps of sections, outcrops, faults, and other geologic features of the earths surface.


The Geology Of The Limespur-Sappington Area, Frank W. Archibald Jan 1940

The Geology Of The Limespur-Sappington Area, Frank W. Archibald

Bachelors Theses and Reports, 1928 - 1970

The area to be surveyed was divided up into sections add each crew of three or four members was assigned one of these sections. The first two days were spent in studying and mapping the geologic section in the South Boulder Canyon where we obtained practice in alidade surveying, brunton, pacing, and auto traverse.


The Quantitve Measurement Of Amalgamation, Robert A. Mcguire Jan 1940

The Quantitve Measurement Of Amalgamation, Robert A. Mcguire

Bachelors Theses and Reports, 1928 - 1970

Mercury has been known since ancient times. In fact, one mine, the "Almaden" in Spain, has been worked continuously since Roman times. It has been used during all this time for the recovery of free gold from gold concentrates, and from black sand and galena in concentrates from placer work.


Fauna Of The Three Forks Formation In Montana, Will Mitchel Jr. Jan 1940

Fauna Of The Three Forks Formation In Montana, Will Mitchel Jr.

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to identify and describe the fauna, correlate it with that of the Upper Devonian of other states, to note the geographic distribution, lithologic variations of outcrops, and to compare measured cross sections.