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Articles 53371 - 53400 of 53562
Full-Text Articles in Entire DC Network
Effect Of Arsenic On Assay For Gold And Silver, Rosco Conkling Ham, Frederick Arnold Moore
Effect Of Arsenic On Assay For Gold And Silver, Rosco Conkling Ham, Frederick Arnold Moore
Bachelors Theses
"In presenting the within thesis, it is not claimed by the authors that the experiments have been, by any means, exhaustive of the subject. Neither is any claim made to original research work other than a series of simple experiments with a view to determining, if possible, some of the more important effects of Arsenic upon a fire assay for gold and silver as met with in the ordinary assay laboratory. To make a work complete and exhaustive on such a subject will require much more time and more complete apparatus than was available in the experiments covered by this …
Effects Of Copper On The Cupellation Of Silver, Charles A. Baker, Miles Sedivy
Effects Of Copper On The Cupellation Of Silver, Charles A. Baker, Miles Sedivy
Bachelors Theses
"The object of this work is to find the effect of copper in the cupellation of silver. Our method of attack was: 1st. To find the effect of varying the amount of copper with constant lead and constant temperature. 2nd. Effect in cupellation of varying the temperature and the lead in the presence of a constant amount of copper. 3rd. To determine the rate at which the copper is removed during cupellation"--page 1.
A Report On The Shattuck And Arizona Mine At Bisbee, Arizona, John Joseph Sanford
A Report On The Shattuck And Arizona Mine At Bisbee, Arizona, John Joseph Sanford
Bachelors Theses
"The Shattuck and Arizona Mine is about one-half mile southwest of the town of Bisbee and five-sixteenths of a mile west of the Holbrook shaft of the Copper Queen property. The mine is on the east slope of Escanbrosa Ridge and a quarter of a mile up Uncle Sam Gulch. It adjoins the Uncle Sam Mine on the north and the Cuprite, a Copper Queen property, on the east"--Location, page 1.
Ordinary Meeting, The Panama Canal, The Lock Canal Type And The Straits Of Panama Type, Kentucky Library Research Collections
Ordinary Meeting, The Panama Canal, The Lock Canal Type And The Straits Of Panama Type, Kentucky Library Research Collections
Research Collections
Article from the Journal of the Society of Arts by M. Philippe Bunauvarilla, Bunau-Varilla helped turn the vote toward choosing the Panama site; he became minister plenipotentiary to the United States. He discusses success and failures in building of the canal.
Design, Specifications And Cost Estimate Of Two Hundred Ton Stamp Mill And Cyanide Plant For Treatment Of Gold Ore, John Payne Sebree, William Peter Hatch
Design, Specifications And Cost Estimate Of Two Hundred Ton Stamp Mill And Cyanide Plant For Treatment Of Gold Ore, John Payne Sebree, William Peter Hatch
Bachelors Theses
"The object of this thesis is the designing and a mill, writing specifications for same, and furnishing complete cost of entire plant to treat 200 tons of gold ore"--page ii.
The Design Of Main Street Reinforced Concrete Arch Over Frisco R. R., Hyman Zirulick
The Design Of Main Street Reinforced Concrete Arch Over Frisco R. R., Hyman Zirulick
Bachelors Theses
"Owing to the cheapness and durability of reinforced concrete, the tendency of the present time in Engineering practice is to build new and replace old structures with reinforced concrete. Therefore, in taking up a subject for a thesis, I have selected, The Investigation of the Design of a Reinforced concrete Arch," or, as I named it, "Main Street Reinforced concrete Arch over Frisco Railroad"--Introduction, page 1.
Chemical And Physical Analysis Of Steel And Iron, John T. E. Ericson
Chemical And Physical Analysis Of Steel And Iron, John T. E. Ericson
Bachelors Theses
No abstract provided.
Meridian-Projecting Instruments And Methods, Albert Babbitt Bartlett
Meridian-Projecting Instruments And Methods, Albert Babbitt Bartlett
Bachelors Theses
"The writer's attention was called to the necessity of knowing the accuracy attainable in surveying which must depend upon the Meridian, and therefore be subject to the accuracy of it, in seeking information by which to decide what would be the most desirable transit to use in the West, particularly for United States Deputy Mineral Surveying. Descriptions of the manipulation, adjustments, and the cost, etc., of the various appliances are plentiful in the text-books on surveying and in the various catalogues; but there was no very definite information in regard to the actual probable and average accuracy, especially in the …
Lime Roasting Of A Galena Concentrate With Subsequent Smelting In The Blast Furnace, Aubrey P. Fellows, Tsik Chan Tseung, James Carter Long, Edwin Richard Wash
Lime Roasting Of A Galena Concentrate With Subsequent Smelting In The Blast Furnace, Aubrey P. Fellows, Tsik Chan Tseung, James Carter Long, Edwin Richard Wash
Bachelors Theses
"Having on hand a quantity of Galena concentrates, which we wished to treat in the blastfurnace accompanied by a usual previous roast, but having no reverberatory furnace, we decided to experiment upon the ore with lime roasting as invented by Savelsbury, to see if it was practicable"--page 1.
Design Of A Lead Blast Furnace, Walter Irving Phillips, Andrew Jackson Seltzer
Design Of A Lead Blast Furnace, Walter Irving Phillips, Andrew Jackson Seltzer
Bachelors Theses
"In order to get the approximate size of the Furnace we made the following assumptions, being guided as far as possible by the practice of the Globe Smelting Works at Denver, Colorado whenever that could be ascertained"--page 1.
Process Of Treating Slimes In Ore Reduction, Gustavus A. Duncan
Process Of Treating Slimes In Ore Reduction, Gustavus A. Duncan
Professional Degree Theses
No abstract provided.
The Composition And Analysis Of Zinc-Lead Pigment, Evans Walker Buskett
The Composition And Analysis Of Zinc-Lead Pigment, Evans Walker Buskett
Professional Degree Theses
"Zinc is present as oxide and sulphate. There are also probably zinc and lead sulphites. It has been suggested that there may be carbonates in this pigment, but this is not probable as the high temperature of the furnace, the complete combustion of the fuel to CO2 and the large excess of SO2 gas in the bagroom would tend to prevent their formation. There is also a chemical combination between the zinc oxide and the lead oxide which is probably a zinc plumbate. Some light can be thrown on the subject by the following experiments:"--page 1.
Efficiency Of Mill Practice In The Joplin District, Ira Lee Wright
Efficiency Of Mill Practice In The Joplin District, Ira Lee Wright
Bachelors Theses
"Milling in the Joplin District is, compared with the practice in other zinc fields, seemingly very crude. To one unacquainted with the peculiar conditions of this district, the amount of ore which goes into the tailing pile seems unnecessarily high. There are several things which account for the low saving made"--page 1.
Treatment Of A Low Grade Gold Ore, Paul Richardson Cook, Sakuhei Sunada, Arnold George Baker
Treatment Of A Low Grade Gold Ore, Paul Richardson Cook, Sakuhei Sunada, Arnold George Baker
Bachelors Theses
No abstract provided.
Plans, Estimates And Specifications For A Sewer System For The City Of Plattsburg, Eldon E. Cook, William C. Perkins
Plans, Estimates And Specifications For A Sewer System For The City Of Plattsburg, Eldon E. Cook, William C. Perkins
Bachelors Theses
"Plattsburg, Missouri is a thriving city of about two thousand population. It is situated in the heart of the most fertile Missouri land. Three railroads - Atchison, Topeka and Santa Fe.; Chicago, Rock Island and Pacific; Quincy, Omaha and Kansas City - give easy access to St. Joseph, thirty miles distant, Leavenworth forty miles, or Kansas City, forty-one miles; respectively. The city is growing steadily and will in a few years be of such size that a sewage system will be necessary. We therefore submit the following plans, specifications and estimates. Since the city could not afford both Stone Sewers …
Graphical Representation Of Compressed Air Formulae, John Thomas Vitt, Paul Andrew Philippi
Graphical Representation Of Compressed Air Formulae, John Thomas Vitt, Paul Andrew Philippi
Bachelors Theses
"Air during compression and expansion obeys the same laws as do other gases and these laws have been mathematically stated by purely rational formulae. Most of these formulae are logarithmic and their use involves a considerable amount of work. The object of this thesis is to present these formulae in such form that problems involving their use may be readily and easily solved. It was decided to present them graphically and the accompanying curves are the results of our labors"--page 1.
An Investigation Of The Treatment Of A Silver Ore By Lixiviation With Sodium And Cuprous Thiosulphate Solutions, Elston Everett Jones
An Investigation Of The Treatment Of A Silver Ore By Lixiviation With Sodium And Cuprous Thiosulphate Solutions, Elston Everett Jones
Bachelors Theses
"The object of this investigation is to find whether the ore can be treated with profit by lixiviation and to find the best conditions for maximum extraction"--page 1.
Comparative Observations On The Evolution Of Gas From The Cathode In Helium And Argon, Clarence A. Skinner
Comparative Observations On The Evolution Of Gas From The Cathode In Helium And Argon, Clarence A. Skinner
University Studies (University of Nebraska) (1888–1984)
No abstract provided.
The Commercial Preparation Of Baryta, Ray Fleming Rucker, Damon Duffield Dunkin
The Commercial Preparation Of Baryta, Ray Fleming Rucker, Damon Duffield Dunkin
Bachelors Theses
"The object of this investigation was to ascertain in a general way the methods employed at the present time in mining, milling and leaching baryta, and the commercial uses to which the product is put, with the idea in view of improving these methods and encouraging a more extended use of the product if possible"--page 1.
Furnace Calculations, John Mcmillen Brooks
Furnace Calculations, John Mcmillen Brooks
Bachelors Theses
"A furnace that will smelt a given amount of material per twenty-four hours, to dimension parts, and finally draw the complete plans. Copper Matting Furnace"--Problem, page 1.
Copper Matting Blast Furnace Run, John Vivian Stevens, Frank Bowman Powell, John Dozier Shanks
Copper Matting Blast Furnace Run, John Vivian Stevens, Frank Bowman Powell, John Dozier Shanks
Bachelors Theses
"The theory of the copper blast furnace run having been given us in the class room, we wishing to familiarize ourselves with the practical processes and the difficulties involved, selected it as the basis of an investigation of which the following is a correct report. The original ore was a high grade copper sulphide from the Ducktown, Tenn. district to which was added some heavy pyritic ore from various quarters. The latter was added to furnish the iron oxide necessary as a flux in the blast furnace and sulphur in sufficient amount to make the ore self roasting when charged …
Plans And Estimates For The Disposal Of Sewage And Storm Water For The City Of Rolla, Mo., Tracy Irwin Phelps, Robert Arthur Barton
Plans And Estimates For The Disposal Of Sewage And Storm Water For The City Of Rolla, Mo., Tracy Irwin Phelps, Robert Arthur Barton
Bachelors Theses
"The City of Rolla is the county seat of Phelps County, situated 111 miles southwest of St. Louis, on the St. Louis and San Francisco R.R. This thriving city of 2000 inhabitants already owns the electric lighting system, and has engineers working upon plans for a deep well water supply system. Since the sanitary conditions are not the best and a water supply is to be installed, we submit these plans and estimates for a "Disposal of Sewage and Storm Water."--page iii.
Treatment Of A Mexican Copper Ore, Harold Thomas Mapes, Robert Hardy Bedford
Treatment Of A Mexican Copper Ore, Harold Thomas Mapes, Robert Hardy Bedford
Bachelors Theses
"The ore to be treated consists of a sulphide carrying some metallic copper"--page 1.
Report And Preliminary Estimate For A Sewerage System For Lebanon, Mo., Ramon Rivera
Report And Preliminary Estimate For A Sewerage System For Lebanon, Mo., Ramon Rivera
Bachelors Theses
No abstract provided.
Report On Polaris Mine, Stanley Ralston Moore
A Special Investigation In Concrete Steel And Application To Square Set System, Horace Alonzo Hand
A Special Investigation In Concrete Steel And Application To Square Set System, Horace Alonzo Hand
Bachelors Theses
"This investigation has been prompted, first, by a desire to become more familiar with concrete-steel in its general application to engineering construction, second, by the inevitable necessity of a substitute in the near future for lumber in mining construction. In first case, a thorough review has been made of principles and practice in the construction of concrete-steel structures in general, including bridges, water towers, reservoirs, viaducts, etc., as found in current engineering journals, which is the most up-to-date source of information available. Special attention has been given to best practice in reinforcing concrete to resist forces of bending, shearing, torsion …
Treatment Of Joplin Tailings, Preston King Horner
Treatment Of Joplin Tailings, Preston King Horner
Bachelors Theses
"In the Joplin region are enormous piles of tailings, that for waste material, run very high in blende. This is due mainly to the temporary character of the mills which are built with more regard to low first cost than to receiving a high percentage of extraction. As a result we have some piles of tailings containing from 200,000 to 300,000 tons of materials that will average from about 2 to 3% zinc, and all crushed so as to pass through about #2 mesh"--Page 1.
Plan For Plant For Manufacturing L.H. 26x48 R.M.T. Corliss Engine, William H. Robinson
Plan For Plant For Manufacturing L.H. 26x48 R.M.T. Corliss Engine, William H. Robinson
Undergraduate Theses and Senior Projects
No abstract provided.
The Lignite Coal Of North Dakota, Clyde Mckeever Laizure, James Knight Christopher
The Lignite Coal Of North Dakota, Clyde Mckeever Laizure, James Knight Christopher
Bachelors Theses
"Owing to the great abundance of coal, both anthracite and bituminous, in the United States, no state need suffer for the lack of it, but to those states like North Dakota, situated in the great plains region and at great distances from such coal supplies, the price of these coals makes them almost luxuries. In the last few years however, the development of the lignite coal within the state of North Dakota has shown an abundance of fuel for many years to come, which, though at one time considered "A poor excuse for poor wood," now competes successfully with any …
Laboratory Tests And Design Of Plant For Treatment Of Gold Ore, William Charles Wyman, Julian Insco Prugh
Laboratory Tests And Design Of Plant For Treatment Of Gold Ore, William Charles Wyman, Julian Insco Prugh
Bachelors Theses
"The object of this work was to determine methods and design plants best adapted for the estraction sic of gold from a given ore in the most profitable manner. In the following sheets are given in detail the work carried out and our conclusions as to the best method of treating this particular ore"--page ii.