Physical Sciences and Mathematics Commons^™

An Investigation Of Methods Used In Mine Analysis Of Iron Ores From The Nashwauk, Minnesota District, Walter F. Joyce

Bachelors’ Theses

In the mining industry like in any other industry the products of the mines and the raw materials are constantly analyzed. Three different analyses are made, on crude ore, on the concentrates and on the cargo. Highest permissible error is allowed on crude ore and mine samples.

The Development Of A Quantitative Scheme For The Separation Of Quaternary Mixtures Of Alkyl Halides And Alcohols, Edward Joseph Pfeifer

Bachelors’ Theses

Organic chemistry offers a large field for quantitative investigation. The nature of many organic compounds makes for difficult analysis. The separation of simple mixtures is oftentimes a problem. The work undertaken in this thesis is of special interest because it combines several phases of chemistry, in the investigation of a problem, which by its very existence, suggests the need for solution.

The Electrodeposition Of Chromium And Iron Alloy, Duane J. Windau

Bachelors’ Theses

The plating of stainless steel, or more correctly, the plating of iron chromium alloys is among the recent projects undertaken by the steel industry to improve its products. Publications on this industrial endeavor are few, although undoubtedly there is considerable work going on. The reason for the sudden interest in stainless steel may be traced to the interesting and valuable properties of chromium steels and especially the stainless steels. However, articles made entirely of stainless steel are expensive and therefore cheaper substitutes have been considered, names the plating of a base metal with chrom-iron alloys. This project will be of …

Photometry, Arthur G. Barkow

Bachelors’ Theses

The preparation of this paper was not undertaken primarily with a view of discussing all types of photometer, but mostly for the investigation of the Ritchie Wedge. As for the first part, the history or resume is brief and somewhat incomplete. In the ensuing pages, no reference is given to the portable photometer, so helpful to illuminating engineers. This was not deemed necessary since the principle involved is similar to those discussed.

Throwing Power Of A Chromium Plating Bath Containing Hydrofluoric Acid Instead Of Sulfphuric Acid, Clarence E. Barta

Bachelors’ Theses

Chromium was discovered in 1797 by a Frence Chemist named Vauquelin who gave it its name from a Greek word for color because of its variety of colors which its various compounds show. The electrode-deposition of Chromium from a Chromium acid solution has been an accomplished feature for the past century but it has only been in the past few years that the mechanism of the process has been sufficiently understood to permit its commercial application.

Harding and Barrows state that it is possible to ob­tain satisfactory Chromium deposits from Chromic acid baths containing compounds other than sulfuric acid which …

A Study Of The Inhibiting Value Of Various Separators On The Plating Of Lead, Lawrence E. Ehrnst

Bachelors’ Theses

This thesis was suggested by the work of Mr. B. J. Pozorski and Mr. W. Adashek. Mr. Pozorski investigated the inhibiting qualities of various separators when placed between two platinum electrodes in a copper sulfate solution. Mr. Adashek worked on the efficiency of various lead plating solutions using lead electrodes and electrlyes containing soluble lead salts. Combining the work of these men, the author is investigating the prohibitive plating properties of various separator using a lead plating solution. By so doing, the investigation has a closer relationship to the actual performance of the storage battery .

Thomas William Robertson, The Mid-Victorian Dramatist, James A. Fitzpatrick

Bachelors’ Theses

It is the purpose of this thesis to determine the position of Thomas William Robertson in the dramatic history of the nineteenth century, and to discover what contributions, if any, he made to the drama of this period. In addition to making a careful analysis of Robertson's more important dramas, I have read all the outstanding dramatic histories of the middle of the last century and some of its popular dramatic works. In my investigation of this problem I have explained the dramatic conditions of the early and mid-nineteenth century, revealed the characteristic tendencies of its popular plays, set forth …

Hyperbolic Functions, Dolores Fitzgerald

Bachelors’ Theses

No abstract provided.

Determination Of The Adsorptive Power Of Charcoal For Caffein In Coffee Infusions, James G. Lappa

Bachelors’ Theses

In recent years, the American public has been confronted with considerable advertising on the part of the large coffee merchants with regard to the reputed harmful effects of the caffein contained in coffee. The attitude taken against this constituent of coffee, was of course, determined by the form of coffee sold by the respective merchants, those handling the ordinary form stressing the importance of correct brewing in preventing any nervous disorders or loss of sleep, and those selling the decaffeinized brand blaming the caffein as the cause. There is considerable disagreement between authorities on this question,since most knowledge of the …

Current Efficiency Of Various Chromium Plating Baths, Clarence R. Hanus

Bachelors’ Theses

Chromium is one of the hardest metals and when properly plated gives a beautiful lustre. It has a fine resistance to oxidizing agents and does not tarnish up to 600°C. Oxygen has little effect on chromium plate, making the latter invaluable for embellishments and decorative purposes.

However, there are difficulties to be overcome in chromium plating, such as,

1. Poor throwing power.
2. Formation of trivalent chromium.
3. Evolution of hydrogen at the cathode.

It has been found that current efficiency is low, resulting in low throwing power, uneven plating and waste of electric energy.

In this thesis it will be attempted to …

The Effect Of Fruit Acids On Aluminum, Glenore M. Dugan

Bachelors’ Theses

Aluminum has been used in cooking utensils for about thirty years and is still the favorite material employed. There is no disagreeable taste, odor or discoloration discernible from its use.

There have been many experiments to prove that aluminum does not depreciate the quality of the food cooked in it. It does, however, add itself to the acidic and basic foods cooked therein. The amount taken up by neutral foods is negligible.

For experimental purposes, fruit juices were chosen as the attacking substances and the strips of aluminum were of the quality used in ordinary cooking utensils, not cast aluminum.

The Design Of A Multiple Intake Drainage Well, Orville L. Eliason

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The reclamation of water-logged land by suitable yet inexpensive forms of drainage is becoming a problem of constantly increasing magnitude. A fairly large portion of the extensive land areas, once considered as worthless has proved to be valuable by the introduction of proper drainage systems. Land areas, in which drainage in its simpler forms has proved inadequate, could perhaps be made valuable were it possible to develop an inexpensive yet effective form of drainage.

This paper has been prepared primarily for a consideration of poorly drained land areas and a possible means of their reclamation by a suitable choice and …

Development Of Geometry And Its Assistance In Promoting Society, Nelson Jean

Electronic Theses and Dissertations

This bachelor’s thesis, presented to Xavier University in 1932, traces the history of geometry and argues that the subject has contributed to the development of society. Jean begins with geometry’s origins in practical needs in ancient Egypt, such as land division and taxation after the flooding of the Nile. He then follows its development through the Greeks, giving particular attention to Thales, Pythagoras, and the third-century mathematicians Euclid, Archimedes, and Apollonius.

Jean also discusses the educational and cultural value of geometry and its practical uses in physics, mechanics, architecture, and astronomy. He concludes that geometry is indispensable to society and …

A New Method For Determining The Rate Of Evaporation And The Relative Humidity, Willliam T. Shaw

Bachelors’ Theses

The presence of water vapor in the air is of the greatest importance to organic life. Animal and vegetable life is entirely dependent on water which very largely reaches the the earth through precipitation of water vapor held in the atmosphere. Not only does the water vapor in the air supply organic life with the life-giving fluid, but it also significantly modifies the climatic conditions of any region. Even in temperate climates such as in southern Australia, the air is often so dry that ordinary wooden furniture and articles of wood cannot be used because the air in this condition …

Factors Affecting The Electrolytic Deposition Of Small Amounts Of Lead As Lead Dioxide And The Composition Of The Deposit, Thomas Gordon Day

Masters Theses

"The purpose of this investigation is to determine the best conditions for the quantitative deposition of lead when the content of this element is below 5 milligrams and to study the composition of the deposited PbO₂. The following conditions were studied during the course of the investigation. 1. The maximum amounts of copper and zinc permissible for the quantitative determination of lead. 2. Methods of separating lead from zinc when the latter element is present in amounts greater than are permitted in the determination of the lead. 3. The separation of lead from copper when this element is in greater …

The Extraction Of Waxes And Wax Mixtures By Means Of Common Organic Solvents, Bernard J. Finley

Bachelors’ Theses

This work was performed with the intention of giving some information of the solubility of the more common waxes, by means of extraction with several commercial solvents. Besides the individual waxes, various mixtures of waxes were also used to determine the effect of the mixtures on the extractability.

Determinations are also made to find the extractable matter in a commercial furniture polish and shellac. The acid, saponification and iodine values of the polish and shellac are also found.

Very little work seems to have been done on the accurate determination of percentage of extractable matter in waxes and mixtures of …

A Study Of The Colloid Obtained From Weathered Lignite, Cecil O. Lohn

Theses and Dissertations

When Lignite is exposed to the action of weather it undergoes various changes, probably due to oxidation. Surface beds of lignite are often rejected by the miners as inferior coal, due to the weathered condition. But when this weathered lignite is treated with sodium hydroxide, and the resulting solution allowed to evaporate to dryness, there is left a hard, shiny substance very similar in appearance to hard coal. This dried product has been exploited under the name of Dakolite. When dispersed in water this product makes a very good wood stain.

Tests made on Dakolite show that it has colloidal …

Dielectric Constant Of Absorbed Water, Reiji Funabiki

University of the Pacific Theses and Dissertations

That the dielectric constant of a substance is one of its important properties is a fact that has been very commonly taken into consideration by electrical engineers in design of apparatus and transmission lines. The importance of the dielectric constant is equally evident to the chemist working in the field of nonaqueous solutions, and Walden and others have spent a great deal of time and energy in attempting to measure the relationship of the dielectric constant of a solvent to its solvent ability, the degree of ionization of a solute dissolved in it, etc. Indeed it has become very common …

Lead Chromate : The Relation Of The Hydrogen Ion Concentration, Dispersion And Chemical Constitution To The Color Of Lead Chromate Pigments., J. W. Spanyer

Electronic Theses and Dissertations

No abstract provided.

A Study Of The Effect Of Temperature Upon Reactions Between Stannous And Arsenate Ions In Silicic Acid Gels, Ellis Elder

University of the Pacific Theses and Dissertations

Chapter I: Statement of the Problem

The purpose of this investigation was to determine to what extent the reaction between stannous and arsenate ions in silicic acid gels is influenced by temperature.

This was to be done by observing (1) the rate of crystal growth; and (2) the appearance of the crystal growth in sets of gels identical in composition but kept at different temperatures throughout the process of crystal growth.

Radio And A Public Address System For The High School, Kenneth H. Westlake

University of the Pacific Theses and Dissertations

All the findings and knowledge of electricity and magnetism are not new; even the Greeks as far back as 600 B. C. knew something about these forces. As time went on the facts increased.

After the experiments of Faraday, Maxwell, Hertz and such men as these, electricity and magnetism became a vital part of human life and endeavor. Within the last twenty-five years the advances in electricity have been very rapid. The action of the electric current is a vital part of many developments and is helping to make human life more enjoyable and interesting.

Almost all schools today are …

The Electret - An Effort To Find The Cause Of Its Permanent Polarization, Ernest F. Lundeen

University of the Pacific Theses and Dissertations

Certain waxes when solidified in a strong electric field exhibit unusual electrical properties. Several days after formation there is a polarization in the direction of the field which seems to persist for an indefinite length of time. The surface that was in contact with the anode during formation first ass a negative charge and then obtains a positive charge, which under proper conditions is practically permanent. The surface that was in contact with the cathode first has a positive charge and then obtains a negative charge which is the permanent charge.

The Electrodeposition Of Chromium-Nickel Alloys., Richard James Whelan 1910-2000

Electronic Theses and Dissertations

No abstract provided.

Studies In The Diphenyl Series : Iv. Ethers And Esters Of Para- And Ortho- Hydroxy Diphenyl., Margaret Agnes Ford

Electronic Theses and Dissertations

No abstract provided.

The Effect Of Hydrogen Ion Concentration On The Color Of Metallic Chromates., John E. Morris

Electronic Theses and Dissertations

No abstract provided.

Studies In The Diphenyl Series Iii : 4,4'-Dichlorotrinitrodiphenyl., H. Harris Ruwe 1908-1980

Electronic Theses and Dissertations

No abstract provided.

The Paleontology And Stratigraphy Of The Magdalena Group Of Northern And Central New Mexico, Wallace A. Bisbee

Earth and Planetary Sciences ETDs

No abstract provided.

The Influence Of A Halowax Oil On The Viscosity Of Lubricating Oil At Various Temperature, Clarence J. Riordan

Bachelors’ Theses

Halowax Oil is used as a.filler in plastic compounds, on wood as an insecticide against termites, and the Petroleum industry finds it a very good valve lubricant in internal combustion engines and a solvent for tarry residues which deposit on combustion chambers. Due to its low viscosity and very low congealing point it would therefore seem logical to investigate this further with the idea of using Halogenated oils as winter lubricants for automobile engines. The work naturally suggested further study, such as its effect on corrosion of steel, aluminum, iron and copper, the flash and fire points, viscosity at various …

Actino- And Thermo- Response Of Molybdenite In Vacuo With Various Colored Lights, John H. Fulton

Master's Theses or Doctor of Nursing Practice

The purposes of this investigation are to study the reaction of molybdenite cells to light of various colors while in vacuo and at various temperatures. The samples of molybdenite were also subjected to radiant heat in the last part of the experiment, which was undertaken to determine to some extent the amount of thermos-electric effect which was due to thermal radiation in the first part of the investigation.

General Steps In The Evolution Of The Calculus From The Time Of The Ancients To The Present, Sister Mary Virginia Ssf

Electronic Theses and Dissertations

This thesis, submitted to Xavier University in partial fulfillment of requirements for a Bachelor of Science degree in 1931, traces the historical development of the calculus from ancient Greek mathematics through the early twentieth century. The study is organized chronologically across eight sections. The introduction defines key mathematical terms including calculus, variable, and limit, and situates the calculus as the most powerful instrument of mathematical investigation. The thesis then examines the Method of Exhaustion developed by Greek mathematicians including Antiphon (430 B.C.), Eudoxus (370 B.C.), and Archimedes (225 B.C.), whose summation of infinite series represents the nearest ancient approach to …