Physical Sciences and Mathematics Commons^™

Pellet Seeding On Sagebrush Range, Gordon E. Gatherum

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Seeding deteriorated range lands efficiently and economically has become one of the most promising means of improving the agricultural economy of the western range states. By providing the most rapid means of increasing the quantity and improving the quality of forage for livestock, and aiding in the prevention of soil erosion, artificial seeding contributes directly to the stability of agriculture.

Although many successful methods of artificial revegetation have been developed by experience and through research, there is still a great need for refinement in techniques to insure better overall success and greater economy of operation. Improper methods often result in …

The Viscosities Of Mixtures Of Naturally Occurring Waxes And Oils At Various Temperatures, Edward L. Gavin

Bachelors’ Theses

The values of the viscosities of waxes, and of the viscosities of oils at various temperatures are numerous in the literature, but there is nothing to be found regarding the viscosities of oil and wax mixtures. Dr. John R. Koch, professor of chemistry, Marquette University, pointed out the lack of such information. It is with this in mind that this thesis was undertaken.

A Study Of The Equilibrium Distribution Of A Solute Between Two Immiscible Solvents, Francis A. Smith

Bachelors’ Theses

Because of the wide application of Distribution Law, for it should hold for the distribution of a dissolved substance between any two phases, for instance, liquid-liquid, gas-liquid, liquid-solid, and so forth, this subject was choosen for further investigation. The tendency for a solute to distribute itself between two immiscible solvents, so that the concentration ratio is a constant, is a direct consequence of the thermodynamic requirements for equilibrium. The reactions of various organic and inorganic acids distributed between water and several organic solvents will be studied.

The Identification Of Alkyl Halides Through Their Conversion To Alkyl 3,5, Dinitrobenzoates By A Reaction Between The Alkyl Halide And The Silver Salt Of The Acid, Nicholas Michel Le Mieux

Bachelors’ Theses

In qualitative organic analysis the final test for the identification of any compound is the preparation of some solid derivative of definite molting point. For routine work it is quite essential that this derivative be easily prepared and purified.

A large number of general derivatives for classes of compounds are now commonly used, such as, the aryl sulfonyl derivatives of amines, the p-bromophenacyl and the p-bromobenzyl eaters of the acids, and the 3,5 dinitrobenzoate esters of the alcohols. However, in the identification of alkyl halides there Is no general type of derivative that possesses the above mentioned characteristics. It la …

The Saponification And Chlorine Determination Of Alkyl Chlorobenzoates To Determine Their Identity And Purity, Joan Bardele

Bachelors’ Theses

Many of the present reagents tor the preparation of alco­hol derivatives are deficient in at least one respect. A preparative investigation was made by Mr. Robert Johnson of alkyl chlorobenzoates, by substitution of benzoyl chlorides on aloohols, since various benzoyl chlorides are now available com­mercially. Mr. Johnson presented a thesis on the "Preparation of Alkyl Chlorobenzoates And Their Application As Alcohol Derivatives". As a result or his work thirty eaters previously not reported in literature were prepared and their melting points and boiling points and refractive indices determined.

In order to give an indication of the identity and purity ot …

The Preparation Of Long Chain Secondary Aliphatic Amines, Robert Fay Betts

Bachelors’ Theses

As organic chemistry has always seemed to be the most interesting study to me, I have chosen this particular branch ­ or chemistry for a thesis.

I found through correspondence with some of the larger petroleum companies in the United States that the preparation of long chain secondary amines would constitute a good thesis topic because these compounds have begun to assume importance as additives to lubricating oil.

Preparation Of 3-Methylphenanthrene, Yvonne C. Bestler

Bachelors’ Theses

The year 1929 witnessed the opening expansion of the previously small list of naturally occurring phenanthrene compounds. The new groups of substances included were as strikingly different in their actions on animal organisms as they were similar in structure.

A Modified Micro Isoteniscope For Measuring Vapor Pressure, Arthur J. Bates

Bachelors’ Theses

A survey of literature will show that the vapor pressures of many substances have not been determined. A probable reason tor this lack of available data might be that the instrumentation needed for these measurements have been quite complex and required highly skilled personnel for its performance.

Vapor-pressure measurements are important in all distillation problems and in the calculation of certain other physical properties. They are used in the correction of boiling points and in the recovery of solvents. The concen­tration of vapor in the gas phase may be regulated effectively by controlling the temperature of the liquid. Humidity conditions, …

Life History Of The Utah Sculpin Cottus Bairdi Semiscaber (Cope) In Logan River, Utah, William M. Zarbook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of the Utah sculpin in Logan River was based on 801 specimens collected during 1949 to March 1951. Numbers of fish examined for various catagories of the study wares length-frequency, 495; aging by vertebrae, 407; length-weight relationship, 601; and food habits, 275.

Fish were collected by use of an electric shocking machine generating 600 watts and 220 volts. Numbers of fish occurred as high as 150 per tenth mile of stream. Preferred habitats occurred in areas of coarse gravel and small rocks.

Vertebrae dissected from the fish were used in age determination. Length-frequency proved to be a general …

The Freezing Point Of Water In Puddled And Unpuddled Soils At Different Soil Moisture Tension Values, Robert B. Campbell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A technique that will adequately describe the physical condition of water in the soil has long been desired by scientists. The method should include the effect of soluble materials on the osmotic pressure of the soil solution, and also the effect of surface force action between the soil and soil water.

Parker (8) demonstrated that the freezing point was reduced in the presence of finely divided material. This suggested the possibility of using the cryoscopic procedure to measure the physical condition of water soil. More recently, the introduction of Thermistors for accurate temperature measurement have made it desirable to investigate …

The Sixty-Third Session Of The Iowa Academy Of Science And The Eighteenth Convention Of The Junior Academy Of Science Of Iowa, April 20 And 21, 1951, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Test 455: Massey-Harris Model 55, Nebraska Tractor Test Lab

Nebraska Tractor Tests

This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …

Diffusion Through A Membrane, Marvin E. Wyman

Journal of the Minnesota Academy of Science

No abstract provided.

A Demonstration Of Various Procedures Used To Interest And Help Pupils To Understand Physics, O. M. Bjeldanes

Journal of the Minnesota Academy of Science

No abstract provided.

Modern Physics, Charles L. Critchfield

Journal of the Minnesota Academy of Science

No abstract provided.

The Inductive Compared With The Deductive Approach To Teaching Secondary School Chemistry, Clarence H. Boeck

Journal of the Minnesota Academy of Science

No abstract provided.

Carbon-Fluorine Chemistry, H. G. Bryce

Journal of the Minnesota Academy of Science

No abstract provided.

Oxidation Of Silver As A Method Of Measuring Ozone Concentration, Lorne Maxwell Chanin

Physics & Astronomy ETDs

It has been found that, under certain conditions, a chemical reaction occurs between silver and ozone. The products of this reaction are silver oxides and oxygen. When heated to a certain temperature, the silver oxides are decomposed into silver and oxygen. If this reaction were produced, then the amount of oxygen resulting from the decomposition would be a measure of the amount of ozone originally present.

The Intensity Of Zodiacal Light, Allan F. Beck

Physics & Astronomy ETDs

The study of the intensities measured in the region of the zodiacal light, the second most important contributor to this light of the night sky after starlight has been subtracted, is the purpose of this paper.

Possible Mineral Resources University Land Grant, Montana School Of Mines Lands, Eugene S. Perry

Bachelors Theses and Reports, 1928 - 1970

The following evaluation of the mineral resources of the University Land-Grant lands has been made from an office study of geologic maps and published reports, and from a rather thorough knowledge of the geology of the state by the writer after 23 years of experience in the state.

Possible Mineral Resources University Land Grant, Montana State University Lands, Eugene S. Perry

Bachelors Theses and Reports, 1928 - 1970

The following evaluation of the mineral resources of the University Land-Grant lands has been made from an office study of geologic maps and published reports, and from a rather thorough knowledge of the geology of the state by the writer after 23 years of experience in the state.

Possible Mineral Resources University Land Grant, Montana State College Lands, Eugene S. Perry

Bachelors Theses and Reports, 1928 - 1970

The following evaluation of the mineral resources of the University Land-Grant lands has been made from an office study of geologic maps and published reports, and from a rather thorough knowledge of the geology of the state by the writer after 23 years of experience in the state.

Possible Mineral Resources University Land Grant, Western Montana College Of Education, Eugene S. Perry

Bachelors Theses and Reports, 1928 - 1970

The following evaluation of the mineral resources of the University Land-Grant lands has been made from an office study of geologic maps and published reports, and from a rather thorough knowledge of the geology of the state by the writer after 23 years of experience in the state.

Internal Pressure And Related Physical Properties, Eugene Ceperley

Bachelors’ Theses

What is internal pressure? That question has never been answered in a satisfactory manner. Probably the best answer is the simple statement that it is a measure of the attraction between molecules. While this is true it gives no indication of what causes the attractive force or of the effects which this attraction has on a substance.

In this thesis an attempt will be made to use this vague definition of internal pressure to find a method of calculating internal pressure using data for various physical properties. The liquid state of various substances will be considered. A relationship which holds …

Note Concerning Cloud Chamber Experiments With Positrons, H. M. Schwartz

Journal of the Arkansas Academy of Science

No abstract provided.

Moment-Generating Functions And Laplace Transforms, James F. Miller

Journal of the Arkansas Academy of Science

No abstract provided.

Limnological Studies In Arkansas, Carl E. Hoffman

Journal of the Arkansas Academy of Science

No abstract provided.

Freshwater Sponges In Arkansas, David Causey

Journal of the Arkansas Academy of Science

No abstract provided.

Proper Mixtures Of Ellis County Soils For Adobe Construction, And Their Physical Properties Part Ii, Buster Wayne Read, W. G. Read, H. A. Zinszer

Fort Hays Studies Series

Houses made of soil have been built for centuries, but until recently the trend had been away from soil to some other building material. Now, however, adobe is again beginning to be recognized as a satisfactory, reliable building material for our time.

Studies Of Antimony Occurrence With Special Relation To Its Effective Extraction, San Jose Antimony Mines, Wadley, San Luis Potosi, Mexico, J. C. Archibald Jr.

Bachelors Theses and Reports, 1928 - 1970

The mines at San Jose which are within the Wadley unit are the largest antimony mines in Mexico. These mines produce more than half of the antimony produced by the company from its mining operations. Since the time of the author's connection with the company, a number of changes have been made in planning of development work, handling of labor, methods of mine development, cost improvement, and other problems inherent in the successful guidance of an operation.