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Articles 5311 - 5323 of 5323

Full-Text Articles in Engineering

A Study Of The Fluorspar Industry Of The United States With Respect To Its Future, Sidney Kincaid Reid Jan 1927

A Study Of The Fluorspar Industry Of The United States With Respect To Its Future, Sidney Kincaid Reid

Professional Degree Theses

"The foregoing study shows that (1) there is ample reserve of fluorspar in the United States to take care of its requirements for many years, (2) if developed and scheduled on a production rate equal to at least seventy-five percent of the annual domestic requirements, (3) which will permit a sufficient increase in production rate in time of war to take care of increased wartime requirements"--Conclusions and Recommendations, page 83.

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A Method Of Snow Surveying And Its Application To Forecasting Stream Flow, Leslie Bowen May 1924

A Method Of Snow Surveying And Its Application To Forecasting Stream Flow, Leslie Bowen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The value of knowing ahead of time the amount of water to be expected from any given stream before the season is to far spent is a valuable asset.

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Economic Geology Of Northern Angola, Artileus Vosteen Eulich Jan 1924

Economic Geology Of Northern Angola, Artileus Vosteen Eulich

Professional Degree Theses

"Most of the mineral deposits have been known to exist for over a generation but efforts to mine them usually met with failure. The most signal discovery, that of diamonds, was made only in recent years. They are the only substance coming under the category of mineral which are being exploited on a large scale. Energetic efforts are being made to find petroleum in commercial quantities. There are still vast areas practically unexplored which if thoroughly prospected might lead to more discoveries. It is difficulty, however, for one who has prospected for two years in Angola without any particular success …

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Rammed Earth Walls For Buildings, U.S. Department Of Agriculture Aug 1923

Rammed Earth Walls For Buildings, U.S. Department Of Agriculture

Rammed Earth Collection (1923 - 1959)

Earth has been used for building dwellings from time immemorial. One method of use, superior to others, and which was known to the Romans has been preserved by tradition .t o modern times. This method consists of ramming slightly moist, specially selected earth, without the addition of straw or other material, between movable forms, and is known by itsFrench name, " pise de terre," which means "rammed earth." Pise de terre is a reliable building material when properly handled and is admirably adapted to structures on farms distant from transport routes. Little information has been published on rammed earth in …

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The Heat Treatment Of Cast Steel, Fred Grotts Jan 1921

The Heat Treatment Of Cast Steel, Fred Grotts

Professional Degree Theses

"Owing to many difficulties reported from the battle fields of France also from many sections of the United States, Mexico, Africa and South America relative to the functioning of the "Caterpillar" track an intensive research was begun early in the spring of 1919 to develop or perfect a material that could be made into intricate forms and which would have such physical properties as would withstand to a maximum degree, the abrasive action of rock and sand while at the same time having a high tensile strength and resistance to shock. A further requisite was that this material must be …

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The Measurement Of Compressed Air And Its Consumption In Rock Drills, Homer Kent Sherry, William Porri Jan 1912

The Measurement Of Compressed Air And Its Consumption In Rock Drills, Homer Kent Sherry, William Porri

Bachelors Theses

"The object of this thesis is to investigate the measurement of compressed air and to determine its consumption in rock drills. Our intention at first was to run more exhaustive tests on the drills, but due to the large amount of work necessary in rigging up the apparatus and computing results, we found it necessary to curtail our work to representative types of the hammer and the piston machines. We regret being unable to give more complete data in regard to the drills, but hope to point out fields for future work since, with the increased facilities now at hand, …

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Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg Jan 1910

Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg

Bachelors Theses

No abstract provided.

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Modern Cyanide Practice, Harvey Edson Smith Jan 1910

Modern Cyanide Practice, Harvey Edson Smith

Bachelors Theses

"It is noticable sic that about all of the recent improvements in cyanide practise sic have been along mechanical rather than chemical lines. the use of oxidizers such as air, ozone, sodium peroxide, etc., the use of the salts of lead, and even the addition of a coating of lead to the zinc shavings in the extractor boxes were all recommended when the process was first advocated but sometimes for different reasons. In the early days of the process the addition of hypochlorites, alkaline persulphates, and the use of mercuric cyanide was also investigated but has not proven satisfactory owing …

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The History And The Development Of The Cyanide Industry, Horace T. Mann Jan 1909

The History And The Development Of The Cyanide Industry, Horace T. Mann

Masters Theses

"The accompanying thesis is a compilation from articles published n the magazines and from books. Where no references are given, the statements are the impressions gained from reading several articles on the same subject. None of the work originated with myself"--page [ii].

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Copper Mining At Cananea, Sonora, Mexico, Albert Hill Fay Jan 1905

Copper Mining At Cananea, Sonora, Mexico, Albert Hill Fay

Professional Degree Theses

"Fifty miles southwest of Bisbee, Arizona, is one of the largest copper mines in the world, - a mine which six years ago was in the throes of the prospecting, developing, and litigation periods, and now turning out over five million pounds of copper bullion per month. This property is located at Cananea, District of Arizpe, sonora, Mexico, and is owned and controlled by the cananea Consolidated Copper Co. S.A. It is situated upon the northeast slope of a short range of mountains from which the town of Cananea derives its name. The port of entry for this part of …

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Advertising Brochure: 1903 Mccormick Farm Equipment, Nebraska Tractor Test Lab Jan 1903

Advertising Brochure: 1903 Mccormick Farm Equipment, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

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Gold Precipitation, William H. Gill, Raphael Curier Alexander Jan 1903

Gold Precipitation, William H. Gill, Raphael Curier Alexander

Bachelors Theses

"Subject - Electrolytic precipitation of gold from cyanide solutions as compared with precipitation on zinc shavings"--page 1.

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The Cyanide Process For Gold, John C. Reid Jan 1893

The Cyanide Process For Gold, John C. Reid

Bachelors Theses

"Since the discovery of Cyanogen in the latter part of the 18th century records of many experiments are in existence, showing, that at various periods, exhaustive researches have been made, in which the point at issue was to investigate that property which now constitutes the foundation of what is known to Metallurgical Science of today as The Cyanide Process, vis. The solvent power of alkali cyanides on gold & silver"--page 2.

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