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Articles 29311 - 29340 of 29714

Full-Text Articles in Physical Sciences and Mathematics

Precambrian Rock Descriptions From Deep Wells In Nebraska, E. Liedecke Jan 1940

Precambrian Rock Descriptions From Deep Wells In Nebraska, E. Liedecke

Conservation and Survey Division

No abstract provided.


Montana Oil Fields, Conrad F. Lundgren Jul 1939

Montana Oil Fields, Conrad F. Lundgren

Bachelors Theses and Reports, 1928 - 1970

Since the discovery of oil in Montana in1916, the petroleum industry has advanced to a point where over 5,000,000 barrels of oil worthover $6,500,000 has been produced in each of the three past years (1936, 1937, and 1938).


The Age Hardening Of Silver With Copper-Silicide, Joseph Edward Shaw May 1939

The Age Hardening Of Silver With Copper-Silicide, Joseph Edward Shaw

Bachelors Theses and Reports, 1928 - 1970

The successful application of the phenomenon of pre­cipitation hardening to aluminum and copper has indicated the possibility of hardening all metals in the same way. The phenomenon of age hardening was discoveredin 1911, and since that time much research has been car­ried on in all parts of the world on various alloy sys­tems.


Structure Of Eutectics, Dilip K. Das May 1939

Structure Of Eutectics, Dilip K. Das

Bachelors Theses and Reports, 1928 - 1970

The present paper is a result of work done on the study of structures of eutectics of a certain eutectic-forming binary systems. In this research work no systems with intermetallic compounds have been studied.


Investigation Of A Method For Extraction Of Indium From Zinc Flue Dust., Harold L. Tanner May 1939

Investigation Of A Method For Extraction Of Indium From Zinc Flue Dust., Harold L. Tanner

Bachelors Theses and Reports, 1928 - 1970

In metallurgical practice today some of the relatively rare metal Indium is recovered as a by-product from the ores of other metals. Indium is a soft, silvery—white metal belonging to the third group of the periodic classification. It is situated just above tin in the electrochemical series.


The Age Hardening Of Copper With Manganese Silicide., Gordon A. Davis May 1939

The Age Hardening Of Copper With Manganese Silicide., Gordon A. Davis

Bachelors Theses and Reports, 1928 - 1970

The increase in hardness is attributed to the manganese silicide being precipitated from solid solution and deposited between crystal planes. The subsequent softening which occurs on prolonging the period of reheating is believed to be due to an agglomeration of the dispersed hardening agent.


Geology Of The Golden Sunlight Mine And Vicinity, Roy H. Earhart May 1939

Geology Of The Golden Sunlight Mine And Vicinity, Roy H. Earhart

Bachelors Theses and Reports, 1928 - 1970

The Golden Sunlight Mine is in the northern part of the Cardwell mining district on the eastern slope of a small range that rises by a series of benches to an elevation of 7,200 at a point five miles east of the town of Whitehall in Jefferson County.


A Study Of Solders, John D. Prater May 1939

A Study Of Solders, John D. Prater

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to furnish a qualitative method of comparing the degree of wetting of various solders upon different plate metals when several fluxes are used.


The Pre-Jurassic Surface Of Montana., G. Fay May 1939

The Pre-Jurassic Surface Of Montana., G. Fay

Bachelors Theses and Reports, 1928 - 1970

It has long been known that, prior to the deposition of Jurassic sediments, Montana was subjected to an intensive period of erosion. Mention of this may be found in numerous reports, especially those dealing with western Montana.


Electrolytic Manganese, George T. Derana May 1939

Electrolytic Manganese, George T. Derana

Bachelors Theses and Reports, 1928 - 1970

The production of metallic manganese by electrolysis is of potential value for the recovery of this strategic metal from domestic deposits. These deposits are largely unsuitable for the production of ferromanganese, but they are amenable to low-cost leaching processes.


Igneous Rocks Of The Jardine And Crevasse Mountain Mining Districts., Ray E. Gilbert May 1939

Igneous Rocks Of The Jardine And Crevasse Mountain Mining Districts., Ray E. Gilbert

Bachelors Theses and Reports, 1928 - 1970

It is surprising to learn that so large a variety of igneous rocks is present in the Jardine and Crevasse Mountain mining districts, a region that is generally thought of as consisting principally of schists.


Powder Metallurgy, Cecil R. Waldron May 1939

Powder Metallurgy, Cecil R. Waldron

Bachelors Theses and Reports, 1928 - 1970

The metal powders may be produced in a number of different ways. In metals where the intercrystalline material is brittle enough, they may be ground in a ball mill or eddy mill. The fineness of such a powder is more or less controlled by the grain size of the original metal.


Glaciation In The Logan Quadrangle, Utah, J. Llewellyn Young May 1939

Glaciation In The Logan Quadrangle, Utah, J. Llewellyn Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

That the higher valleys of the Wasatch Mountains were occupied by Pleistocene glaciers has long been known. King, Hague, and Emmons, geologists of the Fortieth Parallel Survey, the first to undertake a systematic study of any part of the Wasatch Mountains, recognized this fact and their report includes a map which shows in a rough way the extent of the glaciated areas in the Central Wasatch (11 ). In 1909 Atwood (1) made a detailed study of the glacial features of the Central Wasatch in connection with his study of glaciation in the Uinta Mountains. He mapped the deposits of …


Structural Geology At Llallagua, Bolivia, Lowell Moon Apr 1939

Structural Geology At Llallagua, Bolivia, Lowell Moon

Journal of the Minnesota Academy of Science

No abstract provided.


Geology Of A Portion Of The Bull Mountain Range Jefferson County, Montana, Thomas A. Greene Jan 1939

Geology Of A Portion Of The Bull Mountain Range Jefferson County, Montana, Thomas A. Greene

Bachelors Theses and Reports, 1928 - 1970

Work was first done on a known section, the south Boulder Section, in order to familiarize the student with the formations. Most of the area was mapped by plane table and telescopic alidade, general features being surveyed by automobile traverse and a pacing traverse.


A Report Of The Geology Of The Golden Sunlight Mining District, Roy A. Mccready Jan 1939

A Report Of The Geology Of The Golden Sunlight Mining District, Roy A. Mccready

Bachelors Theses and Reports, 1928 - 1970

This paper is a report of a geological survey made of an area of approximately fifty square miles lying Northeast of Whitehall, Montana, in the region of the Golden Sun­light Mine. The survey was made by a field party consisting of twenty-three members of the senior class of the Montana School of Mines.


A New Giant Camel Gigantocamelus Fricki, Gen. Et Sp. Nov., Erwin Hinckley Barbour, C. Bertrand Schultz Jan 1939

A New Giant Camel Gigantocamelus Fricki, Gen. Et Sp. Nov., Erwin Hinckley Barbour, C. Bertrand Schultz

Bulletin of the University of Nebraska State Museum

A lower Pleistocene deposit containing fossil vertebrates near Broadwater, Morrill county, Nebraska, has been reported upon by the writers, beginning three years ago. Five fossil quarries have been opened since the site was discovered in 1936.


The White River Oligocene Rodent Diplolophus, Erwin Hinckley Barbour, Thompson M. Stout Jan 1939

The White River Oligocene Rodent Diplolophus, Erwin Hinckley Barbour, Thompson M. Stout

Bulletin of the University of Nebraska State Museum

The rich and varied nature of the mammalian faunas of the White River Oligocene has been recognized for many years, but the exact geologic succession is only now becoming known. In these faunal assemblages the rodents and lagomorphs appear to have been important elements, perhaps numerically as abundant in the Oligocene as are these same groups at present.


Life History Of The Ginko Petrified Forest Or The Autobiography Of An Ancient Oak Tree, George F. Beck Jan 1939

Life History Of The Ginko Petrified Forest Or The Autobiography Of An Ancient Oak Tree, George F. Beck

Geological Sciences Faculty Scholarship

An account of a fossilized log at Ginkgo Tree State Park written by the man who discovered the fossil trees and established there were Ginkgo trees in North America in the distant past.

The booklet is written from the perspective of one of the fossilized trees, tracing the geologic forces that led to it becoming a fossil.


Geologi̇sche Und Erzmi̇kroskopi̇sche Beobachtungen An Den Ei̇senerzen Des Demi̇rdağ (Di̇vri̇k) Mi̇t Besonderer Berücksi̇chti̇gung Der Geneti̇schen Frage, P. De Wi̇jkerslooth Jan 1939

Geologi̇sche Und Erzmi̇kroskopi̇sche Beobachtungen An Den Ei̇senerzen Des Demi̇rdağ (Di̇vri̇k) Mi̇t Besonderer Berücksi̇chti̇gung Der Geneti̇schen Frage, P. De Wi̇jkerslooth

Bulletin of the Mineral Research and Exploration

No abstract provided.


Di̇vri̇k Demi̇rdağin Jenezi̇ne Ai̇t Jeoloji̇k Ve Mi̇kroskopi̇k Müşahedeler, P. De Wijkerslooth Jan 1939

Di̇vri̇k Demi̇rdağin Jenezi̇ne Ai̇t Jeoloji̇k Ve Mi̇kroskopi̇k Müşahedeler, P. De Wijkerslooth

Bulletin of the Mineral Research and Exploration

No abstract provided.


An Outline Of The Principal Natural Resources Of Nebraska And Their Conservation, George E. Condra Jan 1939

An Outline Of The Principal Natural Resources Of Nebraska And Their Conservation, George E. Condra

George E. Condra Publications

Nebraska is well endowed with important natural resources, such as stone, clay, sand, soil, water, prairie, forests and wildlife. However, soil and water are our basic heritage because they, more than other resources, support native life, agriculture, industry, and social development.


An Outline Of Nebraska's Industries, George E. Condra Jan 1939

An Outline Of Nebraska's Industries, George E. Condra

George E. Condra Publications

The principal industries of Nebraska are summarized into the following groups: mineral, agriculture, manufacturing, transportation and publishing, and trade or mechandizing.


Si̇vas Vi̇layeti̇ İdrokarbürleri̇, Li̇nyi̇tleri̇ Ve Tuzlu Menbalari̇, V. Stchepi̇nski̇ Jan 1939

Si̇vas Vi̇layeti̇ İdrokarbürleri̇, Li̇nyi̇tleri̇ Ve Tuzlu Menbalari̇, V. Stchepi̇nski̇

Bulletin of the Mineral Research and Exploration

No abstract provided.


Türki̇yede Ateşe Mukavi̇m Malzeme Endüstri̇si̇ Tesi̇si̇ne Ai̇t Etüd, H. Hutber Jan 1939

Türki̇yede Ateşe Mukavi̇m Malzeme Endüstri̇si̇ Tesi̇si̇ne Ai̇t Etüd, H. Hutber

Bulletin of the Mineral Research and Exploration

No abstract provided.


South Moccasin Kaolin Deposit, Walter Everly Jan 1939

South Moccasin Kaolin Deposit, Walter Everly

Bachelors Theses and Reports, 1928 - 1970

Kaolin has never been considered an important economic mineral in Montana. Deposits of Kaolin in this state are not described in the literature and apparently very few deposits have been found.


M.T.A. Ensti̇tüsü Üçüncü Çalişma Yilinin Tekni̇k Bi̇lançosu, - - Jan 1939

M.T.A. Ensti̇tüsü Üçüncü Çalişma Yilinin Tekni̇k Bi̇lançosu, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.


Şi̇mali̇ Anadolu Garbi̇ Kömür Havzasindaki̇ Madenci̇li̇k Hakkinda Yeni̇ Jeoloji̇k Noktai̇ Nazarlar, P. Arni̇ Jan 1939

Şi̇mali̇ Anadolu Garbi̇ Kömür Havzasindaki̇ Madenci̇li̇k Hakkinda Yeni̇ Jeoloji̇k Noktai̇ Nazarlar, P. Arni̇

Bulletin of the Mineral Research and Exploration

No abstract provided.


Yeralti Hartaciliği, Muhsin Tunay Jan 1939

Yeralti Hartaciliği, Muhsin Tunay

Bulletin of the Mineral Research and Exploration

No abstract provided.


Cevher Ayiklamada Terakki̇, - - Jan 1939

Cevher Ayiklamada Terakki̇, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.