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Articles 39391 - 39420 of 40197
Full-Text Articles in Physical Sciences and Mathematics
A Mineral Dressing Study Of The Benefication Of Philipsburg Manganese Carbonate Ore, Frank M. Antonioli
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
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.
An Investigation Of The Gallium-Indium Binary System, Allen D. Kennedy
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.
Test 440: Allis-Chalmers Wd, Nebraska Tractor Test Lab
Test 440: Allis-Chalmers Wd, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Physiographic Surfaces And Weathering Near Butte, Gordon B. Brox
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.
Test 439: Allis-Chalmers B, Nebraska Tractor Test Lab
Test 439: Allis-Chalmers B, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
The Alloys Of Gallium And Indium, C. J. Adams
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.
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.
Test 438: Minneapolis-Moline Z, Nebraska Tractor Test Lab
Test 438: Minneapolis-Moline Z, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
The Electrolytic Polishing Of Steel In Solutions Of Sulphuric And Phosphoric Acids, Joseph W. Tripp
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
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
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 Study Of Some Pre-Cambrian Schists From Yankee Jim Canyon, Park County, Montana, Charles K. Presley
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
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.
A Preliminary Study Of The Benefication Of Montana Corundum, John L. Brown
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.
Geology Of Smoke Hollow Area 8 Miles Southeast Of Deerlodge, Powell County, Montana, Floyd C. Bossard
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
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
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.
The Bighorn Mountains, The Little Rocky Mountains And The Bowdoin Dome Uplifts, E. J. O'Connell
The Bighorn Mountains, The Little Rocky Mountains And The Bowdoin Dome Uplifts, E. J. O'Connell
Bachelors Theses and Reports, 1928 - 1970
The purpose of this paper is to secure an actual figure describing the amount of uplift in the Bighorn Mountains, the Little Rocky Mountains and the Bowdoin Dome. To the writer’s knowledge, the amount of uplift in the areas mentioned has not been determined before. Such a figure could be useful in structural studies of Montana and Wyoming, because the amount of uplift is a fair measure of the intensity of orogenic forces; also, the amount of uplift is a prerequisite to the determination of the amount of erosion.
Was Assimilation Important In The Formation Of The Boulder Batholith?, Richard Marvin
Was Assimilation Important In The Formation Of The Boulder Batholith?, Richard Marvin
Bachelors Theses and Reports, 1928 - 1970
Examination of a rock suite from the northern end of the Boulder batholith reveals that four of the eight criteria for assimilation as given by Grout are present. Thus, in the opinion of the writer, there is evidence and trends to signify assimilation, but no indication of the importance that it played in the formation of the Boulder batholith.
The Renova "Syenite" Porphyry Madison County, Montana, James H. Clement
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.
An Investigation Into The Precipitation Of Copper From Mine Water By Cupric Copper Reduction, And The Subsequent Precipitation Of Copper As Cuprous Chloride, Jack T. Gentry
Bachelors Theses and Reports, 1928 - 1970
The objective of this thesis is to determine the possibility of applying a different method to the recovery of the copper dissolved in the Butte mine waters, and thereby precipitate a purer cement copper with greater efficiency and less iron consumption.
Test 441: Mccormick-Deering Wd-9, Nebraska Tractor Test Lab
Test 441: Mccormick-Deering Wd-9, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT:
TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear.
This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker, point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated.
BELT HORSEPOWER TESTS
TEST B: The throttle …
Test 450: Oliver Row-Crop 88 Diesel, Nebraska Tractor Test Lab
Test 450: Oliver Row-Crop 88 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Relative Productive Value Of Land, Karl Harris, Vaughn E. Hansen
Relative Productive Value Of Land, Karl Harris, Vaughn E. Hansen
Reports
Location, markets, hard surface roads and other transportation facilities, churches, taxes, schools, and utilities are major factors in the monetary value of land, yet these things do not contribute to the land’s productivity. In this bulletin the only factor considered in determining the agricultural value of land is its productive capacity.
The three major factors in the productive value of land are water, climate, and soil.
These three factors are the principal ones in crop production. If any one of them is unfavorable to plant growth, it can inhibit or even prevent plant growth regardless of how favorable the other …
Advertising Brochure: Case W-9, Nebraska Tractor Test Lab
Advertising Brochure: Case W-9, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Advertising Brochure: Allis-Chalmers , Nebraska Tractor Test Lab
Advertising Brochure: Allis-Chalmers , Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Advertising Brochure: Minneapolis-Moline Comfort Tractor, Nebraska Tractor Test Lab
Advertising Brochure: Minneapolis-Moline Comfort Tractor, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Purification Department Of Zinc Leaching Division At Anaconda, Montana, J. L. Brown
Purification Department Of Zinc Leaching Division At Anaconda, Montana, J. L. Brown
Bachelors Theses and Reports, 1928 - 1970
The original smelter, known as the Upper Works smelter, was located on the north side of the Warm Springs Creek, just 2 miles east of the city of Anaconda and 26 miles from the city of Butte. By the year 1894 this smelter had a capacity of 500 tons of ore a day.
The Vanadium Plant Of The Anaconda Reduction Works, Tom Liss
The Vanadium Plant Of The Anaconda Reduction Works, Tom Liss
Bachelors Theses and Reports, 1928 - 1970
No complete history of mining and smelting will ever be written that does not include a major discussion of the Butte district. The colorful tale of this area plays a major role in the interesting stories of mining. In the fields of mining methods, labor relations end financial manipulations, the Butte area has set a standard.