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Articles 40021 - 40050 of 40851

Full-Text Articles in Engineering

Czarina Mine, Butte, Montana, Prodyot K. Das Jun 1950

Czarina Mine, Butte, Montana, Prodyot K. Das

Bachelors Theses and Reports, 1928 - 1970

The Czarina mine operated for a short time during the last Great War, lies in the southwestern corner of the Butte mining district of Montana. This area was worked during the extensive silver mining in Butte during the 1890's, and was prospected from time to time in later years. The orebody of the mine consists of fissure fillings of manganese mineral oxidized to a certain depth, in a fracture zone of the Boulder Batholith.

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Test 446: International Td-18a, Nebraska Tractor Test Lab Jun 1950

Test 446: International Td-18a, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Test 445: International Td-14a, Nebraska Tractor Test Lab Jun 1950

Test 445: International Td-14a, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Test 444: Ford 8nan, Nebraska Tractor Test Lab Jun 1950

Test 444: Ford 8nan, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Test 443: Ford 8n, Nebraska Tractor Test Lab Jun 1950

Test 443: Ford 8n, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Test 442: Cockshutt 40, Nebraska Tractor Test Lab Jun 1950

Test 442: Cockshutt 40, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Mineralization Of The Bonanza Mine, H. M. Callaway Jun 1950

Mineralization Of The Bonanza Mine, H. M. Callaway

Bachelors Theses and Reports, 1928 - 1970

The Bonanza mine of the Emery mining district in Powell County is on the largest veins in the area, and is developed to a depth of 680 feet by an incline shaft following the dip of the structure. Sulfide ores carrying gold and silver values are mined throughout the area which is easily accessible by road from Deerlodge, Montana, ten miles west of the district.

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Montana Talc; Problems In Physical Properties, E. C. Armstrong Jun 1950

Montana Talc; Problems In Physical Properties, E. C. Armstrong

Bachelors Theses and Reports, 1928 - 1970

General information on talc, including foreign and United States occurrences, origin, and uses is covered. Montana deposits are discussed in greater detail as to location, geology, mineralogy, and mining. Studies of talc by petrographic and x-ray methods and an experiment to determine the porosity are described and discussed.

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Importance Of Unconformities To Oil Occurrence In Montana, Robert E. Evenson Jun 1950

Importance Of Unconformities To Oil Occurrence In Montana, Robert E. Evenson

Bachelors Theses and Reports, 1928 - 1970

Although the majority of geologic structures in Montana have been tested in the search for petroleum, only a few have been found to contain commercial quantities of either oil or gas, and with each successive dry hole, producers are becoming more and more wary of investing capital in new wells located on structural features alone. It is apparent that if new oil and gas fields are to be found in Montana, exploration must be done on the basis of some­thing other than structure, or combined with structure.

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Fauna Of The Pilgrim Formation Of The South Boulder Creek Area In Southwestern Montana, John T. Eastlick Jun 1950

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.

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Foraminifera From The Colorado Shale Near Sunburst, Montana, Frank R. Reynolds Jun 1950

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.

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A Study Of The Effect Of The Maximum Melt Temperatures Upon The Degree Of Supercooling Of Gallium, Wilfred E. Nagel Jun 1950

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.

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Fauna And Stratigraphy Of The Meagher Formation At Three Localities In Southwestern Montana, William J. Van Matre Jun 1950

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.

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Mottling In The Meagher Limestone, Ronald J. White Jun 1950

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.

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A Study Of The Divide-Dewey Contact Of The Boulder Batholith, Francis M. Young Jun 1950

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.

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Foraminifera Of The Colorado Shale At Fort Benton, Montana, Robert E. Willson Jun 1950

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.

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Soft X-Rays, William F. Roherty Jun 1950

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 …

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Test 441: Mccormick-Deering Wd-9, Nebraska Tractor Test Lab May 1950

Test 441: Mccormick-Deering Wd-9, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Test 437: Minneapolis-Moline G, Nebraska Tractor Test Lab May 1950

Test 437: Minneapolis-Moline G, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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A Mineral Dressing Study Of The Benefication Of Philipsburg Manganese Carbonate Ore, Frank M. Antonioli May 1950

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.

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The Isothermal Transformation Curve For S.A.E. 6150, Charles Arentzen May 1950

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.

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Physiographic Surfaces And Weathering Near Butte, Gordon B. Brox May 1950

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.

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An Investigation Of The Gallium-Indium Binary System, Allen D. Kennedy May 1950

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.

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Test 439: Allis-Chalmers B, Nebraska Tractor Test Lab May 1950

Test 439: Allis-Chalmers B, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Test 440: Allis-Chalmers Wd, Nebraska Tractor Test Lab May 1950

Test 440: Allis-Chalmers Wd, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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The Alloys Of Gallium And Indium, C. J. Adams May 1950

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.

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Hot-Dip Aluminizing Of Low-Carbon Steels, Claude R. Barnes Jr. May 1950

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.

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The Electrolytic Polishing Of Steel In Solutions Of Sulphuric And Phosphoric Acids, Joseph W. Tripp May 1950

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.

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Test 438: Minneapolis-Moline Z, Nebraska Tractor Test Lab May 1950

Test 438: Minneapolis-Moline Z, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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An Isothermal Study Of An S.A.E. 6150 Steel, Tom Liss, C. Arentzen May 1950

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.

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