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Articles 4231 - 4260 of 4559
Full-Text Articles in Engineering
Copper Mining In South America, Charles Kenneth Rose
Copper Mining In South America, Charles Kenneth Rose
Professional Degree Theses
"The Morococha district is situated in the Andes of Central Peru, Department of Junin, four miles east of the crest of the Western Cordillera, which there forms the Continental Divide. The town of Morococha is at an elevation of 14,800 feet and is connected by rail with Callao, the port of Lima, ninety miles to the west, and with La Oroya, the smelting center, thirteen miles to the east. The Peruvian Central Railway ascends from Lima along the valley of the Rio Rimac to Ticlio (15,665 feet) where it tunnels through the Divide and descends the Yauli Valley to La …
How South-West Wisconsin Tailing Piles Can Be Worked At A Profit, Gerald Henry Pett
How South-West Wisconsin Tailing Piles Can Be Worked At A Profit, Gerald Henry Pett
Professional Degree Theses
"It was not until the Flotation Process was introduced in this S.W. Wisconsin zinc district that the writer was convinced that some of the tailing piles here could be worked at a profit. In 1928, the Badger Zinc Company built a 120 ton Flotation Plant about two miles north-east of Linden. It was after the second visit to the plant that the writer learned the above company was making a profit of a 5% zinc ore with very little lead and with a low market price for the finished product, namely $30.00 per ton for a 60% zinc concentrate...the body …
Sinking And Equipping Inclined Shafts Of More Than 60 Degree Dip, Wilford Stillman Wright
Sinking And Equipping Inclined Shafts Of More Than 60 Degree Dip, Wilford Stillman Wright
Professional Degree Theses
"The advisability of putting down an inclined shaft in preference to the vertical type should be carefully considered before a definite choice is made. One, of course, presupposes the existence of a dipping ore body that is to be prospected or developed for subsequent mining. Unless a vein has been previously developed there is no certainty that it maintains the same degree of pitch for any great distance below surfaces. If straight, the proposed inclined shaft may depart considerably from the downward course of the vein with the result, that, at least some of the anticipated advantages of the shaft …
Conveyor Mining In The Thin Vein Coal Fields At Excelsior, Arkansas, Bernard Degen Boyd
Conveyor Mining In The Thin Vein Coal Fields At Excelsior, Arkansas, Bernard Degen Boyd
Professional Degree Theses
"From the results obtained after a year and a half of operation using the long face system of conveyor mining in our thin seam of coal, four decided advantages over the old system of room and pillar work with wide rooms have been proven: 1. Operations are concentrated in small sections, thereby permitting larger tonnages to be loaded. 2. One hundred per cent extraction of the vein is obtained (with the exception of main slope pillars) which prolongs the life of the mine. 3. The ventilation of this gaseous vein is simplified. 4. Production costs are reduced"--page 15.
Mercury In The Terlingua District Of Texas, William Woodhouse Kay
Mercury In The Terlingua District Of Texas, William Woodhouse Kay
Professional Degree Theses
"Material for this paper was assembled during 1936 when the author, with an associate, studied the Terlingua District and did some actual prospecting and mining in various parts of this district. This paper endeavors to describe mercury mining in the Terlingua District of Texas generally. No attempt is made to treat any of the various aspects of this industry too technically as this is not the purpose of this paper"--Introduction, page iii.
Laboratory Concentration Of A Lead-Zinc-Fluorspar Ore From Southern Illinois, Shiou-Chuan Sun
Laboratory Concentration Of A Lead-Zinc-Fluorspar Ore From Southern Illinois, Shiou-Chuan Sun
Masters Theses
"The purpose of this investigation was to ascertain the feasibility of preparing marketable products from a rather complex sulphide-fluorspar ore"--Object, page 2. "The ore was examined exhaustively by chemical, microscopic, and mineralogical methods of analysis. After a thorough knowledge of the physical characteristics of the ore had been obtained, flotation concentration tests were made to separate the sulfide minerals from the fluorspar and to attempt to prepare lead-zinc and fluorspar concentrates of marketable grade"--Scope of Work Done, page 2.
Development And Operation Of The Universal Coal Mine, Clinton, Indiana, Horace Herbert Clark
Development And Operation Of The Universal Coal Mine, Clinton, Indiana, Horace Herbert Clark
Professional Degree Theses
No abstract provided.
Small Scale Mining Possibilities In Southeast Missouri, William Walbridge Weigel
Small Scale Mining Possibilities In Southeast Missouri, William Walbridge Weigel
Professional Degree Theses
"The disseminated lead ore bodies of St. Francois County in southeast Missouri are known for their enormous size and even grade over large areas. Several of these ore bodies are over a mile long by a quarter mile wide. They have been worked on a commensurate scale. The smallest mill in the district, at Bonne Terre, now treats 2,500 tons daily capacity. Each of these mills is supplied by a single ore hoisting shaft. The disseminated ore district of St. Francois County is bounded by the Big River-Bonne Terre fault on the north and west, by the Simms Mountain fault …
The Problems Of The Silver Dyke Mine, Dale Irwin Hayes
The Problems Of The Silver Dyke Mine, Dale Irwin Hayes
Professional Degree Theses
"In a newly conceived mining enterprise serious operating problems may remain concealed until encountered in the actual early operating period of the property. The major problems of the Silver Dyke Mine were of this nature. This mine is the property of the Silver Dyke Mining company, a subsidiary of the American Zinc, Lead and Smelting Company. It is situated about five miles from Neihart, Montana. A three-and-one-half-mile trucking road connects the mine with a railway siding. The property is in the Little Belt Mountains, at an elevation of about seven thousand feet. The climate is severe, the winters long, and …
Drilling For Placer Deposits Of Gold And Platinum In The Jungles Of Colombia, Theodore Owen Seiberling
Drilling For Placer Deposits Of Gold And Platinum In The Jungles Of Colombia, Theodore Owen Seiberling
Professional Degree Theses
"In the following report I have made no attempt to "white-wash" or to exaggerate conditions as I found them in the Choco. In plain language I have endeavored to give the reader a picture of the obstacles met, and overcome by the engineer in his search for placer deposits of gold and platinum with the prospect drill in the jungle"--Foreword, page 1.
New Victory Mining Company Avon, Powell County, Montana, E. Renouard Jr., E. P. Shea
New Victory Mining Company Avon, Powell County, Montana, E. Renouard Jr., E. P. Shea
Bachelors Theses and Reports, 1928 - 1970
Mr. L.D. McClean and Mr. A. Schemel, officers of the New Victory Mining Company, requested an examination of the company's properties near Avon, Montana. Following this request Mr. E. Renouard Jr., and Mr. E.P. Shea visited the properties on March 2nd and 3rd, 1935, and submit herewith the following report.
A Study In The Production Of Calendered Linoleum, Harry Simanton Pence
A Study In The Production Of Calendered Linoleum, Harry Simanton Pence
Professional Degree Theses
"The manufacture of similar products in two different plants results in duplication of effort, high production costs and difficulty in maintaining uniformity. The bringing of Philadelphia production of Battleship, Jaspe and Cork Carpet to the Trenton Plant will enable all calendered goods to be produced under single control, thus insuring uniformity and better supervision"--Introduction, page 8.
Commercial Mineral Waters Of North-Central Texas, Shirley Alfred Lynch
Commercial Mineral Waters Of North-Central Texas, Shirley Alfred Lynch
Professional Degree Theses
"The great increase in demand for mineral water the past few years has lead to the development of a new industry, the making of mineral water crystals. Wells that were abandoned as unsuitable for water supply, due to their salinity, have been cleaned or redrilled, in a frantic effort to supply the ever increasing demand of the crystal plants. The inevitable result is that their waters are being used at an alarming rate of consumption. The popular conception is that there is no end to the amount of charged waters that may be obtained, and, as a result, within some …
Personnel Relations, James Kneeland Richardson
Personnel Relations, James Kneeland Richardson
Professional Degree Theses
"The author has not attempted to portray an idealistic scheme in this paper. It is the result of personal experience among working men, listening to their complaints and grievances; and suddenly discovering that all any man asked was the right to be independent during his declining years; the right of free speech; the right to earn his living by working under good conditions; and the right to receive in compensation for his labor a fair and equitable division of profits on goods resulting from his work. All the points taken up in this paper are not common to one industry, …
Tax Depletion Problems Of The Tri-State District, Glenn A. Dooley
Tax Depletion Problems Of The Tri-State District, Glenn A. Dooley
Professional Degree Theses
"The passage of the Internal Revenue Act of 1918, with its articles affecting mines and mining, ushered in a new field of activity for the mining engineer. With the final adoption of the Act in February 1919, it became evident that an immediate valuation would be required; not as of the present date but, in the case of older mines, as of a date six years before. This retroactive legislation brought confusion to the operator and taxed the ingenuity of the engineer. The law provided that the value of the property could be subtracted from the income tax returns, as …
Dedusting And Preparation Of Screenings, Erwin Gammeter
Dedusting And Preparation Of Screenings, Erwin Gammeter
Professional Degree Theses
"There are a number of advantages to be obtained by the removal of fine dust and the proper proportioning and mixing of the smaller grades of coal. The dedusted coal is much better for mechanical stokers since it contains very little dust to drop through the grates or to be carried up the stack. The fuel bed is more open with the dust removed, combustion is better, and the draft is more easily regulated. Dust removal also increases the fusion temperature of the ash, reducing the amount of slag formed on the grate. Elimination of clouds of dust at points …
Sherardizing As Applied To Stampings From Light Gauge Metals, Matthew Patrick Brazill
Sherardizing As Applied To Stampings From Light Gauge Metals, Matthew Patrick Brazill
Professional Degree Theses
"Sherardizing, or dry galvanizing as it is sometimes called, is a process whereby articles of iron or steel are rendered rust proof by applying a coating of zinc. The coating produced by this process is first an alloy with the underlying metal. After this alloying action is completed the outer layer of zinc is deposited. Briefly stated, this coating is not a pure layer of zinc, but a zinc iron alloy"--The History of Galvanizing, page 1.
The Magma, 1934, Associated Students Of The Montana College Of Mineral Science And Technology
The Magma, 1934, Associated Students Of The Montana College Of Mineral Science And Technology
Magma 1909-1947
No abstract provided.
Foundations For Aquatic Oil Wells, Henry Emmett Gross
Foundations For Aquatic Oil Wells, Henry Emmett Gross
Professional Degree Theses
"During the past decade, man has found the courage to drill for oil at those forbidding locations which were made inaccessible by several feet of water. Some of the major fields of the world have been developed by this new manner of work, and others might have been added had the stage been set for the play. The most spectacular marine oil field development occurred along the Santa Barbara Coast of California from 1929 to 1931. It was the writer's good fortune to have been an assistant to Mr. Hans E. A. Gude, the field engineer of Pacific Western Oil …
Fuller's Earth In Southeast Missouri, Willard Farrar
Fuller's Earth In Southeast Missouri, Willard Farrar
Professional Degree Theses
"Recent work, (1933-34) in southeastern Missouri by the Missouri Geological Survey has shown that deposits of bleaching clay occur in the Porters Creek formation of Tertiary age. Various localities in Scott and Stoddard counties are described, in which favorable conditions for development exist. The method of testing the clay for bleaching power is treated briefly. Suggestions are offered in regard to prospecting, mining and milling"--Abstract, page 5.
The Effect Of Preservatives On The Inflammability Of Wood, Merton Ira Signer
The Effect Of Preservatives On The Inflammability Of Wood, Merton Ira Signer
Professional Degree Theses
"It is the purpose of this thesis to present some data on the fire-resistance and inflammability of wood, treated with preservatives commonly used for mine timber"--Object of Thesis, page 3.
La MineríA En El Peru (Sinopsis Para El Año De 1929), Felipe B. Oré
La MineríA En El Peru (Sinopsis Para El Año De 1929), Felipe B. Oré
Professional Degree Theses
No abstract provided.
Mining Methods At The Arevalo Mine, El Chico, Hidalgo, Mexico, John Gay Reilly
Mining Methods At The Arevalo Mine, El Chico, Hidalgo, Mexico, John Gay Reilly
Professional Degree Theses
"The Arevalo Mine of the Cia.de Real del Monte y Pachuca is located nine kilometers north of the City of Pachuca, Hidalgo, Mexico. It is reached by an excellent automobile road from Pachuca. Several different branches of the Mexican Railway System place Pachuca within easy access of the different entries of Mexico"--The Arevalo Mine, Location, page 1.
Ventilation At The Portovelo Mines, John Paul Harmon
Ventilation At The Portovelo Mines, John Paul Harmon
Professional Degree Theses
"This paper was written with two objects in view: (1) To describe in detail what has been done toward the ventilation of the main unit of the Portovelo mines and the results; (2) to give information that may be useful to anyone who may have to make a preliminary mine ventilation survey, with recommendations for the improvement of the existing system and finally the maintenance of the improved system"--page 1.
Proposed Method Of Ventilating The Frood Mine, Herman Jacob Mutz
Proposed Method Of Ventilating The Frood Mine, Herman Jacob Mutz
Professional Degree Theses
"The Frood Mine lies about two and one half miles north of the City of Sudbury, Ontario. The Frood deposit was among the first discoveries in the district, but was not considered as a very important deposit until 1925, when a deep drilling campaign disclosed higher grade ore with depth"--page 3.
A Summary Of Operations And Practice At Shenandoah-Dives, Howard Histed
A Summary Of Operations And Practice At Shenandoah-Dives, Howard Histed
Professional Degree Theses
"The property of the Shenandoah-Dives Mining Company is located in the Animas Mining District, San Juan County, Colorado. The Mine is located on King Solomon Mountain, four miles east and one mile south of Silverton. Silverton is on a branch line of the narrow guage Denver & Rio Grande Western Railway, on which the nearest smelter is located at Durango, a distance of about fifty miles. Included in this report is a claim map showing all the claims and their relative locations"--Location of the Property, page 1.
Some Early Geologists And Their Work In Montana, John E. Blixt
Some Early Geologists And Their Work In Montana, John E. Blixt
Bachelors Theses and Reports, 1928 - 1970
This paper marks an increased refinement and more detailed accuracy in the description of the geological features of the state. It includes the recent studies of mineral deposits, of oil structures, of the formations of bedded rocks and their included fossils, carried on both by the Federal and State governments and by various interested private persons, such as the mining companies. It is within this period that the Federal Government encouraged the U. S. Geological Survey in the publication of monographs on the National Parks, papers of great popular interest and educational value making these beautiful regions comprehensible in their …
The Lead And Zinc Deposits In The Sedimentary Rocks Of East Tennessee And Southwest Virginia, Joseph Hugh Reid
The Lead And Zinc Deposits In The Sedimentary Rocks Of East Tennessee And Southwest Virginia, Joseph Hugh Reid
Professional Degree Theses
"In its geographic and geologic relations this area forms a part of the Appalachian province, which extends from the Atlantic Coastal plain on the East to the Mississippi lowlands on the West and from Central Alabama to Southern New York. All parts of the region thus defined have a common history recorded in its rocks, its geologic structure and its topographic features"--Geography, page 1.
An Engineer's Report Of A Lead And Zinc Mining Property, Ernest Moran
An Engineer's Report Of A Lead And Zinc Mining Property, Ernest Moran
Professional Degree Theses
"Gentlemen: Pursuant to your request, I have analyzed and classified the data relative to the Van Buren Mine of the Lucky Syndicate Mining and Smelting Company and beg to submit the following report. The lease is a lead and zinc mining property consisting of eighty (80) acres more or less..."--Letter to the Wright Mining & Royalty Co Miami, Oklahoma, dated December 9, 1929.
Longface And Longwall Mining Methods Being Tried In Oklahoma Coal Fields, Earl Hollinger Mcalpine
Longface And Longwall Mining Methods Being Tried In Oklahoma Coal Fields, Earl Hollinger Mcalpine
Professional Degree Theses
"Of a number of long wall and long face mining methods in use in Oklahoma mines at this time, I shall outline four in this paper. Two of these methods are in use in mines which are comparatively level. The first of these is in the Kali-Inla mine near Hartshorne. The second is in the Milby-Dow Coal Company mine at Dow. The Mullen Coal Company mine near McAlester and the Hailey-Ola Company mine near Lutie are steep pitching mines"--page 1.