Engineering Commons^™

Fauna Of The Pilgrim Formation Of The South Boulder Creek Area In Southwestern Montana, John T. Eastlick

Bachelors Theses and Reports, 1928 - 1970

This paper, a study of the fauna of the Pilgrim formation at South Boulder Creek in southwestern Montana, represents a laboratory study of the fossil specimens collected by Dr. Alvin Hanson during the summer of 1949. The scope of investigation includes identification and classification of the faunas, their stratigraphic relationship and zonal subdivisions.

Foraminifera From The Colorado Shale Near Sunburst, Montana, Frank R. Reynolds

Bachelors Theses and Reports, 1928 - 1970

One of the many secrets which planet Earth has jealously kept from its inhabitants is the microscopic fossil form known as the foraminifer. It hides in common shale, awaiting the patient and painstaking searcher. In furthering the study of the foraminifera of the Colorado group of for­mations in Northern Montana_, the United States Geological Survey has collected several suites of shale samples from the Sunburst Dome, five to ten miles south of the Canadian border and twenty-five miles north of the city of Shelby, Montana_.

A Study Of The Effect Of The Maximum Melt Temperatures Upon The Degree Of Supercooling Of Gallium, Wilfred E. Nagel

Bachelors Theses and Reports, 1928 - 1970

If, in a system at a giv­en temperature, there should occur a decrease in free energy and this decrease does not take place, then the resulting condition of the system is termed supercooling. A common example of the phenomenon is found in the liquid-to-solid transition of many substances, when the temperature of the liquid may be lowered below its freezing point without solidification. Similar phenomenon occurs in the gas-to- liquid, gas-to-solid, and polymorphic transformations.

Fauna And Stratigraphy Of The Meagher Formation At Three Localities In Southwestern Montana, William J. Van Matre

Bachelors Theses and Reports, 1928 - 1970

In the past 75 years, the scenic area about the head­waters of the great Missouri River has attracted the atten­tion of many leading stratigraphers and paleontologists; for in this area bountiful outcrops of Paleozoic fossil horizons are available for study and correlation.

Mottling In The Meagher Limestone, Ronald J. White

Bachelors Theses and Reports, 1928 - 1970

The middle Cambrian Meagher limestone of southwest Montana is characterized by mottled members that are finely crystalline in the tan part and microcrystalline in the dark matrix. As seen in the literature, similar mottled limestones are thought to be an arrest­ed stage in the dolomitization, or alteration of limestones.

A Study Of The Divide-Dewey Contact Of The Boulder Batholith, Francis M. Young

Bachelors Theses and Reports, 1928 - 1970

The batholith is dated as Paleocene or early Eocene. The rocks of the batholith in this area are classified as ranging from quartz-granodiorite to granodiorite. Variation in mineral content causes a chance in color tone from light to dark gray. swarms of inclusions occur in the igneous rock near the contact.

Foraminifera Of The Colorado Shale At Fort Benton, Montana, Robert E. Willson

Bachelors Theses and Reports, 1928 - 1970

Shale is known to be a source-bed for oil, and the Colorado shale which is over 2000 feet thick in places may well be the source for the oil which is now accumulated in the included or closely associated sandstones. A thorough study of the fossil content may not only be helpful in correlation of Cretaceous sediments, but it likewise may be the starting point for studies ^-which could eventually lead to the discovery of unknown mineral deposits.

Soft X-Rays, William F. Roherty

Bachelors’ Theses

Traditionally, radiation of those wavelengths produced by a potential of from 2 to 25kv. has been classified as "Grenz" or "soft" x-rays. The peculiar property of this radiation is its low penetrating power. While being transparent to more energetic radiation, animal tissue and similar materials are sufficiently opaque to Grenz rays as to be studied in detail. Since the radiation is of the continuous type, it can be made soft enough to reveal any object, providing, of course, that the tube window and object medium be not opaque. Soft x-rays are produced in exactly the same manner as others, except …

A Theoretical And Experimental Analysis Of Delay Circuits, Shuh-Tuh Tsai

Electrical and Computer Engineering ETDs

A delay circuit is a circuit which produces rectangular pulses of specified duration.

A rectangular pulse consists of three parts: first, a sudden rise of voltage; second, remaining a constant voltage during a certain time interval; and third, a sudden drop of voltage to its original value.

If the sudden rise of voltage at t, is produced by a certain sudden action of a circuit previous to the pulse circuit, the sudden drop of voltage at t₂ can cause another circuit to produce a sudden action. Thus, the second action is produced by the first action at a time …

An Experimental Investigation Of Multivibrators, Harry W. Gates

Electrical and Computer Engineering ETDs

The object of this study is two-fold. The first part of the investigation is concerned with substantiating experimentally the mathematical analysis for the conventional multi-vibrator and to derive similar expressions for the grid return multi-vibrator. The second purpose of this investigation is to delve into several possible ways of improving the linearity and thereby the frequency division usefulness of the multi-vibrator.

The Design, Construction, And Operation Of A Guarded Hot Box, Don Williams Jr.

Mechanical Engineering ETDs

The guarded hot box is a device for measuring the coefficient of heat transfer through typical wall sections, and, with some modifications, through insulations. In order to determine this coefficient, it is necessary to know the temperature difference across the wall and the quantity of heat flowing through a given area of the test sample when thermal equilibrium has been reached.

A Study Of A Small Hydrofoil Boat With Airplane Type Controls, Allyn B. Hazard

Mechanical Engineering ETDs

The primary purpose of this study was to determine if the application of airplane type controls to the hydrofoil boat would produce a stable craft that would be safe to operate. The secondary purpose of this study was to determine if a human operator could respond to changes in the boat's attitude brought on by wave action or other factors in time to keep the craft running in a desirable operating condition. Finally, the commercial possibilities were to be determined by the performance of the prototype.

The Design And Control Of Hot Plant Mix Pavement, Thomas Gordon Brown

Civil Engineering ETDs

No abstract provided.

A Mineral Dressing Study Of The Benefication Of Philipsburg Manganese Carbonate Ore, Frank M. Antonioli

Bachelors Theses and Reports, 1928 - 1970

The beneficiation of rhodochrosite ore to the extent that it is suitable for nodulizing and subsequent use in the steel industry is intriguing. Such ores from certain mines is relatively easy to beneficiate, but the rhodo-chrosite ore from several deposits of the Philipsburg district has never been successfully up-graded by any of the several known beneficiating methods.

The Isothermal Transformation Curve For S.A.E. 6150, Charles Arentzen

Bachelors Theses and Reports, 1928 - 1970

More than 3000 years ago, men began quenching and tem­pering tools to improve their physical properties. The an­cient people found that iron was easier to shape and form in a heated condition. Charcoal was used as the fuel, and when the shaping process was completed, the smiths cooled the piece in the most obvious way, quenching in water. Quite un­intentionally, these people stumbled on the process for im­proving the properties of iron, and the art of blacksmithing began.

Physiographic Surfaces And Weathering Near Butte, Gordon B. Brox

Bachelors Theses and Reports, 1928 - 1970

Three cycles of erosion have modified the Boulder batholith. The earliest cycle produced a peneplaination that has been largely obliterated by a partially completed intermediate cycle, and the recent cycle now in progress.

An Investigation Of The Gallium-Indium Binary System, Allen D. Kennedy

Bachelors Theses and Reports, 1928 - 1970

Twenty-four alloys, at 5 weight per cent or smaller intervals, were investigated by the thermal method. Very low temperatures had to be attained, because most of the alloy melts supercooled remarkably. Analysis showed only a liquidus and solidus line, and the solidus temperature was the same for each alloy.

An Annotated Handbook Of Free Teaching Materials For Industrial Arts Instructors, Donald L. Ferguson

Master's Theses or Doctor of Nursing Practice

This research comprising a handbook of free teaching materials for the industrial arts instructor is prepared as an aid to the classroom and shop teacher. There are many teaching aids now available for industrial arts teachers. Comparatively few industrial arts teachers know where to obtain these materials. The primary purpose of this research is to present in form "An Annotated Handbook of Teaching Materials for These Instructors. " This handbook includes the address, name, source, and description of materials available at no cost.

The Alloys Of Gallium And Indium, C. J. Adams

Bachelors Theses and Reports, 1928 - 1970

Thermal analysis VIPS used to construct cooling and heating curves from which the phase diagram was determined. The data for the entire set of cooling curves were obtained by the use of mercury thermo­meters.

Hot-Dip Aluminizing Of Low-Carbon Steels, Claude R. Barnes Jr.

Bachelors Theses and Reports, 1928 - 1970

In a relatively short period of sixty-five years, aluminum has grown to the rank of fifth in total weight of met­als produced in the world. Throughout its short life, aluminum has been found to have excellent corrosion-resistant properties; yet only in recent years has aluminum been under consideration as a corrosion-resistant coating for iron and steel.

The Electrolytic Polishing Of Steel In Solutions Of Sulphuric And Phosphoric Acids, Joseph W. Tripp

Bachelors Theses and Reports, 1928 - 1970

The process of cleaning and pickling the surfaces of steel objects by electrolytic methods has been known and applied since about 1920; the fact that under certain con­ditions these surfaces acquired a brilliant luster was noted as early as 1928.

An Isothermal Study Of An S.A.E. 6150 Steel, Tom Liss, C. Arentzen

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis is to set forth the method followed, the laboratory procedure practiced, the results obtained, the conclu­sions drawn, and the recommendations proposed as a consequence of a metallographic study of the isothermal transformation of an S.A.E. 6150 steel.

Isothermal Transformation Of S.A.E. 6150 Steel By The Magnetic Permability Method, Richard R. Douglas

Bachelors Theses and Reports, 1928 - 1970

Since the purpose of this thesis is primarily to present an improved mechanical method for plotting isothermal transformations by means of differential mag­netic permeability between untransformed austenite and its ultimate transformation product.

A Preliminary Study Of The Benefication Of Montana Corundum, John L. Brown

Bachelors Theses and Reports, 1928 - 1970

The objective of this thesis was to affect an effic­ient and economical recovery of corundum. The corundum oc­curs as a crude ore admixed with quartz and other diluents. Yet, this material is a potential Montana resource of a val­uable non-metallic mineral. In view of the strategic import­ance and the relatively small production of this mineral in the United States, it seems advisable at this time in world affairs to investigate every possible source of this mineral.

The Renova "Syenite" Porphyry Madison County, Montana, James H. Clement

Bachelors Theses and Reports, 1928 - 1970

Unique feldspar porphyries, syenitic in appearance, and granitic in composition, form an unusually thick sill intrud­ing pre-Cambrian Belt graywacke about eight miles south of Whitehall in southwestern Montana. Commercial deposits of gold and silver ores occur nearby, and may possibly be genet­ically related to the porphyry, although direct association is not evident. The geologic age is believed to be late Cretaceous or early Tertiary, and the sill may be related to the Tobacco Root batholith.

A Study Of Some Pre-Cambrian Schists From Yankee Jim Canyon, Park County, Montana, Charles K. Presley

Bachelors Theses and Reports, 1928 - 1970

One of the most highly deformed metamorphic rock series in Montana is exposed fifteen miles north of Yellowstone Park, Wyoming in the great gorge known as Yankee Jim Canyon, which was formed by Yellowstone River at that point. These metamorphics are Pre-Cambrian in age, and are almost certainly sedimentary in origin, although the involved and intricate folding which they have undergone has long since obliterated any superficial traces of that origin.

The Lilly Mine Of Powell County, Montana, Wilbur Aikin

Bachelors Theses and Reports, 1928 - 1970

For many years the Elliston District, of Powell County has been a minor producer of gold, lead, zinc, and silver. Although never among the largest producing districts of the state, it has with the exception of the war years supplied a notable tonnage of ore to the neighboring mills ever since the first placer and lode claims were located there during the late eighteen hundreds.

Geology Of Smoke Hollow Area 8 Miles Southeast Of Deerlodge, Powell County, Montana, Floyd C. Bossard

Bachelors Theses and Reports, 1928 - 1970

This investigation was undertaken primarily as a problem in geologic mapping. The stratigraphy was studied as to the character, age, and sequence of the geologic formations that are exposed. The conclusions were based principally on the field relationships and lithology because no fossils were found.

Structure Of Southwestern Montana, Donald W. Levandowski

Bachelors Theses and Reports, 1928 - 1970

Intrusions of granitic rocks on a large scale are commonly found in the central part of folded mountain systems. Igneous rocks, intrusive and extrusive, are widespread in the mountains of southwestern Montana. An examination of the structural pattern of this area indicates that the fold trends form a radial pattern. How and why this pattern formed and its relation to the igneous activity in the area have not yet been discussed in the literature.

Basic Sills In Cottonwoood Creek Canyon, Jefferson County, Montana, Dale F. Kittel

Bachelors Theses and Reports, 1928 - 1970

A stratigraphic section of about 2600 feet of upper Beltian to lower Devonian formations exposed in Cottonwood Creek Canyon 11 miles east of Whitehall, Montana, contains about 20 igneous sills. These sills are from 5 to 20 feet thick, and grade from granogabbro to quartz basalt, except for one sill which is 165 feet thick, and is composed of granogabbro and red syenite. The whole sedimentary series is isoclinally folded, and the sills follow the bedding planes closely with localized crosscutting through the beds.