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Articles 29611 - 29640 of 29939
Full-Text Articles in Geology
The Electrical Conductivity Of The Copper-Aluminum Alloys., William W. Hintalla
The Electrical Conductivity Of The Copper-Aluminum Alloys., William W. Hintalla
Bachelors Theses and Reports, 1928 - 1970
Among the many aluminum alloys which have been studied are the binary copper-aluminum alloys. These have proven to be among the most useful of the aluminum alloys thus far worked upon.
The Effect Of Temperature On The Rate Of Dissolution Of Gold In Cyanide Solutions Which Have A Constant Oxygen Content., Robert Currie
The Effect Of Temperature On The Rate Of Dissolution Of Gold In Cyanide Solutions Which Have A Constant Oxygen Content., Robert Currie
Bachelors Theses and Reports, 1928 - 1970
Since the development of cyanidation into a highly efficient process for treating gold ores, many papers have been written on its various aspects. Although, there has been much work done on it, the chemistry of the reaction is not yet completely understood.
The Presence Of Rhenium In Montana Manganese Ores., Henry E. Swanson
The Presence Of Rhenium In Montana Manganese Ores., Henry E. Swanson
Bachelors Theses and Reports, 1928 - 1970
Rhenium properties offer many interesting possibilities, therefore any ores containing rhenium would be of considerable value. Its close relationship to manganese in the periodic table led to the belief that manganese ores would be an excellent place to search for the metal. Investigation of the literature of rhenium revealed that no ore was known to contain more than 0.001 per cent of rhenium.
The Electrowinning Of Copper From Roasted Sulphides, Thomas B. Linn
The Electrowinning Of Copper From Roasted Sulphides, Thomas B. Linn
Bachelors Theses and Reports, 1928 - 1970
A hydrometallurgical process for the recovery of copper from flotation concentrates has long been considered an attractive possibility. The object of such a method is to produce electrolytic copper without resorting to expensive matte smelting and converting.
Electrolytic Recovery Of Copper And Zinc From Brass, D. H. Swank
Electrolytic Recovery Of Copper And Zinc From Brass, D. H. Swank
Bachelors Theses and Reports, 1928 - 1970
The purpose of this research was to continue the work of Thomas Parker, who worked on the recovery of copper and zinc from brass during the school year l934 - 1935. Since there is such a wide variety of brasses made with usually a third alloying constituent, remelted scrap is suitable only for castings of wide tolerance in specifications.
Geology Of The Tuxedo Mining District, R. W. Lawson, B. R. Tarrant, A. L. Gallagher
Geology Of The Tuxedo Mining District, R. W. Lawson, B. R. Tarrant, A. L. Gallagher
Bachelors Theses and Reports, 1928 - 1970
The Tuxedo mining district lies fifteen miles west of Butte on the south east end of Deer Lodge valley. Prospecting and mining has been carried on in this district for about 20 years. As a result many pits have been dug, several adits have been driven, and two or three shallow shafts have been sunk.
The Deposition Of Monomolecular Films., Albert Wilbur Schlechten
The Deposition Of Monomolecular Films., Albert Wilbur Schlechten
Bachelors Theses and Reports, 1928 - 1970
The formation of monomolecular films is possible because of the action of the heteropolar molecules of certain fatty acids, especially stearic. Under the proper conditions the acid will spread out until a monomolecular film is formed.
Formations Of The Columbia Basin, Parade Of Extinct Mammals, George F. Beck
Formations Of The Columbia Basin, Parade Of Extinct Mammals, George F. Beck
All Faculty Scholarship for the College of the Sciences
In this preliminary chart are shown the extinct mammals encountered as fossils in the various formations among and above the great Columbia Basalt series of the Pacific Northwest. A few shown as appearing in the Lake Vantage horizon of the basalts.
Determination Of Fossil Woods (Part Iv-Walnut-Hickory-Persimmon), George F. Beck
Determination Of Fossil Woods (Part Iv-Walnut-Hickory-Persimmon), George F. Beck
All Faculty Scholarship for the College of the Sciences
These three woods undoubtedly ranged over Western America in Tertiary and were well represented in the Ginkgo series of forest during Miocene. Fossil walnut wood is the more abundant of the three species, while hickory is not common.
Camels Of The Columbia Plateau, George F. Beck
Camels Of The Columbia Plateau, George F. Beck
All Faculty Scholarship for the College of the Sciences
However foreign they may seem to us the camels are one of our oldest American stocks. Our Western plains once supported large herds of them, humped and humpless, large and small, giraffe-necked and normal-necked. For some 35 million years, from Oligocene to the Pliocene, the camels were confined to North America and it was not until recently, geologically speaking that we shared the race with the Old World.
Determination Of Fossil Woods (Part Iii-The Elms), George F. Beck
Determination Of Fossil Woods (Part Iii-The Elms), George F. Beck
All Faculty Scholarship for the College of the Sciences
The elms are among the best known and most beloved trees found native to America. Like the redwood they belong to that large group of trees which in preglacial days grew generally over the northern hemisphere.
Determination Of Fossil Woods (Part Ii-The Oaks), George F. Beck
Determination Of Fossil Woods (Part Ii-The Oaks), George F. Beck
All Faculty Scholarship for the College of the Sciences
The oaks, unlike the sacred ginkgo or temple tree, are thriving throughout the northern hemisphere today. Not only is the oak an entirely familiar and abundant element in existing landscapes, but its history goes back into the centuries and ages. Its leaves and woods are generously represented in fossil forests as far back as the early Tertiary and closely allied forms penetrate as far back as the Cretaceous.
Geological Conditions Responsible For The Deficiency Of Underground Water In Certain Areas In Minnesota, Geo. A. Thiel
Geological Conditions Responsible For The Deficiency Of Underground Water In Certain Areas In Minnesota, Geo. A. Thiel
Journal of the Minnesota Academy of Science
No abstract provided.
Correlation Of The Members Of The Shawnee Group In Southeastern Nebraska And Adjacent Areas Of Iowa, Missouri And Kansas, G. E. Condra, E. C. Reed
Correlation Of The Members Of The Shawnee Group In Southeastern Nebraska And Adjacent Areas Of Iowa, Missouri And Kansas, G. E. Condra, E. C. Reed
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Wood Occurring In The Ginkgo And Associated Petrified Forest (No. 1-The Gingko), George F. Beck
Wood Occurring In The Ginkgo And Associated Petrified Forest (No. 1-The Gingko), George F. Beck
All Faculty Scholarship for the College of the Sciences
The most interesting single fossil tree, but at the same time the most difficult to determine in the Ginkgo Petrified Forest (Washington), is the tree after which this unusual petrified forest takes its name. The ginkgo is not only the world's oldest and most remarkable living tree, but it has long been regarded as holding the most striking fossil record of any living thing, plant or animal.
Grinding Thin Sections For Determining Petrified Woods, George F. Beck
Grinding Thin Sections For Determining Petrified Woods, George F. Beck
All Faculty Scholarship for the College of the Sciences
The collector and student of petrified woods cannot long be satisfied to merely place these colorful and interesting specimens in the cabinet with the mere label, "petrified wood." Frequently determining the types of wood which once thrived in a given area is of importance to give a clue to climatic conditions of past geological ages. The collector should at least be qualified to recognize the more common woods and distinguish one family of trees from another.
Conservation Of Land And Water Resources Of Nebraska, G. E. Condra
Conservation Of Land And Water Resources Of Nebraska, G. E. Condra
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
A Preliminary Study Of The Animal Ecology Of The Niobrara Game Preserve, Watson E. Beed
A Preliminary Study Of The Animal Ecology Of The Niobrara Game Preserve, Watson E. Beed
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
A Study And Application Of The Process Of Supergene Enrichment Of Silver Ores., Arthur C. Verling
A Study And Application Of The Process Of Supergene Enrichment Of Silver Ores., Arthur C. Verling
Bachelors Theses and Reports, 1928 - 1970
In many deposits of silver ores the grade of the ore decreases considerably a few hundred feet below the surface. It is believed that in many cases the better ores owe their richness in part to the process of sulphide enrichment. It is recognized, however, that many rich silver ores are hypogene deposits that have been affected very little, if any, by processes of enrichment.
Chemical Analyses Of Some Oil-Well Waters Of Russell, Ellis And Trego Counties, H. Everett Runyon
Chemical Analyses Of Some Oil-Well Waters Of Russell, Ellis And Trego Counties, H. Everett Runyon
Master's Theses or Doctor of Nursing Practice
Considerable work dealing with analysis of oil-well waters of other areas has been published, but to the knowledge of the author, none has been published dealing specifically with the waters of this area. While the waters dealt with in this paper are not far different from the waters of the Midcontinent area as a whole, there are certain differences which are noticeable. For instance strontium is found in the top waters of the Eldorado, Kansas field. None has been found in this area. The sulphate content of the top water here is very high. Both apparently cause trouble at times. …
The Extraction Of Manganese From Manganese Flue Dust., John Raymond Moore
The Extraction Of Manganese From Manganese Flue Dust., John Raymond Moore
Bachelors Theses and Reports, 1928 - 1970
It is estimated that 90 to 95% of the world’s consumption of manganese is used in the steel industry in the form of either ferromanganese or spiegeleisen. The remainder is used in the form of either salts or oxides, chloride, dioxide and monoxide.
A Study Of The Effect Of Oxygen On The Rate Of Dissolution Of Gold In Cyanide Solutions., John A. Cook
A Study Of The Effect Of Oxygen On The Rate Of Dissolution Of Gold In Cyanide Solutions., John A. Cook
Bachelors Theses and Reports, 1928 - 1970
The accepted chemical reactions in the dissolution of gold by cyanide solutions require the presence of gold, cyanide, water, and oxygen. The importance of dissolved oxygen in cyanide solutions as a factor is recognized by those familiar with cyanidation. Manufacturers of cyanidation equipment realize the necessity of oxygen, as shown by the appliances they have developed which are attached to the agitators in order to saturate the cyanide solutions with air.
The Control Of The Grain Size Of Zinc, Oswald J. Wick
The Control Of The Grain Size Of Zinc, Oswald J. Wick
Bachelors Theses and Reports, 1928 - 1970
The use of zinc as a structural metal has been militated against by two of its properties, namely, its low tensile strength and its susceptibility to grain growth. The importance of these factors can be appreciated when it is realized that the tensile strength of coarsely crystalline cast zinc is 4,000 pounds per square inch, while finely crystalline cast zinc has a tensile strength of 12,000 pounds per square inch.
Contact Metamorphism In The Highlands, Frank Trask Jr.
Contact Metamorphism In The Highlands, Frank Trask Jr.
Bachelors Theses and Reports, 1928 - 1970
On the southern margin of the Boulder Batholith, about twenty miles south of Butte in the Highland Mountains, there are many miles of contact between the igneous and sedimentary rocks. As two kinds of igneous rocks and many different kinds of sedimentary rock are present, it is an excellent place for the study of contact metamorphism.
A Preliminary Study Of Montana Copper - Nickel Ore, J. Argall Mcallister
A Preliminary Study Of Montana Copper - Nickel Ore, J. Argall Mcallister
Bachelors Theses and Reports, 1928 - 1970
Deposits of sulfides, containing nickel and copper with associated platineferous minerals occur in the Stillwater Igneous Complex. This is a group of unusual igneous rocks situated in Stillwater and Sweetgrass counties in Montana.
Geology And Ore Deposits Of The Golden Era And Goldfinch Mines, Argenta Mining District, Montana., Glenn C. Johnston
Geology And Ore Deposits Of The Golden Era And Goldfinch Mines, Argenta Mining District, Montana., Glenn C. Johnston
Bachelors Theses and Reports, 1928 - 1970
This report includes the results of geological investigation of a small area in the northern part of the Argenta mining district. Approximately two square miles were mapped. The underground working of the three mines only were accessible: the Goldfinch. Golden Era, and Mayday mines.
The Effects Of Lime On The Amalgamation Of Gold., Rollien R. Wells
The Effects Of Lime On The Amalgamation Of Gold., Rollien R. Wells
Bachelors Theses and Reports, 1928 - 1970
An amalgam is an alloy of mercury with other metals, and amalgamation is the art of making or forming amalgams. In metallurgical language the word is limited to the means adopted for the recovery of gold and silver from their ores by the use of mercury.
The Geology Of A Part Of The Bear River Range And Some Relationships That It Bears With The Rest Of The Range, Vic E. Peterson
The Geology Of A Part Of The Bear River Range And Some Relationships That It Bears With The Rest Of The Range, Vic E. Peterson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The structure of the western three or four miles of the Bear River range east of Logan, Utah, has many times been alluded to in papers written locally on Cache Valley and the related ranges. There has not however, ever been, to the author's knowledge, an investigation made of this portion of the range for the express purpose of determining its exact structure. Although the area specifically covered by this present investigation is greatly inadequate to base the whole west range structure on, the author believes that the facts brought to light by the specific study of this area, added …
Geology Of Some Gold Deposits Of Montana, Leo Edwin Efraimson
Geology Of Some Gold Deposits Of Montana, Leo Edwin Efraimson
Bachelors Theses and Reports, 1928 - 1970
Gold is one of the rarer metals in nature, and chemically it is one of the most inactive. Gold forms stable, natural compounds with few other elements, and only with metals.
An Analysis Of The Flowering Plants Of Nebraska, John Mack Winter
An Analysis Of The Flowering Plants Of Nebraska, John Mack Winter
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.