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Articles 841 - 851 of 851
Full-Text Articles in Engineering
Some Notes On The Composition Of "Copper Pitch", Richard R. Matthew
Some Notes On The Composition Of "Copper Pitch", Richard R. Matthew
Bachelors Theses and Reports, 1928 - 1970
A supply of so-called "copper pitch" ore was received by the Montana Bureau of Mines and Geology in response to a request by them from a resident of Kalispell, who had previously sent a specimen to the Bureau for a mineralogical analysis.
Since this material was little known and had apparently received but little study under a reflecting microscope, it was thought that such a study might throw some light on the mineralogical and chemical composition of the material.
Joint Planes In The Rhyolites Of The Butte District, Montana, John B. Hopkins
Joint Planes In The Rhyolites Of The Butte District, Montana, John B. Hopkins
Bachelors Theses and Reports, 1928 - 1970
The problem herein discussed deals with the pointing planes found in the area of rhyolite located in the northwestern portion of the Butte District. The question to be determined was whether or not the pointing planes in the rhyolites could be classified with the Butte Ore fissure systems.
The Aplitic Body Bordering Roosevelt Drive South Of Butte, Montana, Edward B. Trueworthy Jr.
The Aplitic Body Bordering Roosevelt Drive South Of Butte, Montana, Edward B. Trueworthy Jr.
Bachelors Theses and Reports, 1928 - 1970
The area studied consists of a large body of aplite situated 12 miles south of Butte. It extends eastward almost to the Butte-Pipestone road, southward to Lime Kiln Hill and westward a distance of 3000 feet.
The petrographic work was supplemented by a map of the area. Special attention was given to those frequent "Limonite Specks" found in the aplite.
A Bentonite Deposit Near Warm Springs, Montana, R. H. Larson
A Bentonite Deposit Near Warm Springs, Montana, R. H. Larson
Bachelors Theses and Reports, 1928 - 1970
This report deals with a bentonite deposit recently developed, approximately seven miles northeast of Warm Springs, Montana. A group of claims have been staked on the deposit and are owned by the Lincoln Mining Company of Anaconda, Montana. The company also has several claims prospected for silver one mile from its present site of operations, but the silver prospects have failed to produce. The bentonite deposit was discovered incidentally during the course of other development work, and at present two adits have been driven into the side of a mountain, each crosscutting a vein-like mass of bentonite varying from two …
The Rate Of Precipitation Of Copper Aluminide In The Silver Rich Silver-Copper-Aluminum Alloys, Thomas Finley Mcbride
The Rate Of Precipitation Of Copper Aluminide In The Silver Rich Silver-Copper-Aluminum Alloys, Thomas Finley Mcbride
Bachelors Theses and Reports, 1928 - 1970
In order to determine the best annealing temperature at which to age-harden the alloys, hardness tests on specimen annealed for different lengths of time at different temperatures were made.
The Effect Of Hydrogen Overvoltage On The Electrolytic Deposition Of Zinc, John M. Munzenrider, Kenneth O. Sweeney
The Effect Of Hydrogen Overvoltage On The Electrolytic Deposition Of Zinc, John M. Munzenrider, Kenneth O. Sweeney
Bachelors Theses and Reports, 1928 - 1970
In the deposition of metallic zinc by electrolysis from neutral or acid solution, little difficulty is experienced provided certain impurities are absent from the electrolyte. The use of the process has long been considered as a potential source, patents on the process having been issued as early as 1880. However, the early experimenters failed to realize the importance of impurities in the electrolyte, and for this reason, the process suffered several severe setbacks when commercial plants were built.
The Electrolytic Deposition Of Chromium Upon Aluminum, E. Fults, L. D. Voerge
The Electrolytic Deposition Of Chromium Upon Aluminum, E. Fults, L. D. Voerge
Bachelors Theses and Reports, 1928 - 1970
The purpose or this investigation is primarily to determine the best conditions for plating chromium on aluminum. The work was carried out with the hope of obtaining coherent deposits, and of determining the conditions under which such deposits may be duplicated.
Preliminary Construction Of A Photo-Electric Cell Concentrator, Stanley S. Williams
Preliminary Construction Of A Photo-Electric Cell Concentrator, Stanley S. Williams
Bachelors Theses and Reports, 1928 - 1970
The separation of the valuable portion from the waste portion of an ore is an individual problem for every ore. However, the various methods for accomplishing this end, more or less classify themselves by the physical properties of the constituents of the ore. Most of the properties of minerals have been utilized in some way or other to affect the separation of the valuable from the invaluable parts. Practically nothing has been done so far with color and luster to attain this purpose.
It is believed that the photo—electric cell could also be used in concentrating a certain class of …
Age Relationships Of Ore Deposits Of Southwestern Montana (A Microscopic Study), Charles R. Trueworthy
Age Relationships Of Ore Deposits Of Southwestern Montana (A Microscopic Study), Charles R. Trueworthy
Bachelors Theses and Reports, 1928 - 1970
Although considerable work has been undertaken by some prominent geologists, the best known of which is that of Paul Billingsley and J. A. Grimes', in investigating the ore deposits of the Boulder Batholith and surrounding area, there has not been any complete microscopic investigation of these deposits, as a whole, published in the literature. With this in mind it was suggested to the writer by Professor Paul A. Schafer, of the Montana School of Mines, that a microscopic study of the ores of this region would be a worthwhile geologic problem.
It was thought that the mineral association and the …
A Preliminary Study Of The Separation Of The Copper Sulfides From Sphalerite And The Effect Of Certain Reagents On Some Of The Pure Copper Minerals In Synthetic Mixtures, Gailen T. Vandel
Bachelors Theses and Reports, 1928 - 1970
The problem of separating the copper sulfide minerals from sphalerite, in copper - zinc ores, has been a difficult one. This is largely due to the lack of adequate research and the small amount of data obtainable on the behavior of copper and zinc sulfide minerals in flotation circuits.
The Chromite Deposits Of Stillwater And Sweetgrass Counties, Montana, Uuno Sahinen
The Chromite Deposits Of Stillwater And Sweetgrass Counties, Montana, Uuno Sahinen
Bachelors Theses and Reports, 1928 - 1970
In writing this report, two objects were kept in mind, (1) to explain, if possible, the origin of the chromite deposits found in Sweetgrass and Stillwater Counties, and (2) to bring up to date all information on these deposits which had thus far been available.
The work done consisted of study of the rocks and ores of the area under the microscope, both as thin sections and as polished sections, practically all of which was done at the Montana State School of Mines, during the school year of 1928 - 1929.
The rock specimens and much information as to their …