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Articles 69421 - 69450 of 69606
Full-Text Articles in Engineering
Square Set System Of Timbering As Employed By The Shannon Copper Co., Ray Eugene Hoffman
Square Set System Of Timbering As Employed By The Shannon Copper Co., Ray Eugene Hoffman
Professional Degree Theses
"The properties of The Shannon Copper Co., consisting of mine and smelter, are located in the Southeastern part of Arizona in what is known as the Clifton-Morenci District. The smelter is located at Clifton and the mine at Metcalf, eight miles distant on an iron capped mountain known as Serro Preito.
From a geological standpoint the ore deposits of the Clifton-Morenci District are a freak. There are no fissure veins of any consequence in the district; all the large deposits are found in bodies, the ore usually occurring in a soft porphyry.
Underlying the iron capping on the Shannon property …
Report Of La Mina Boquillas Del Carmen, Of Coahuila, Mexico, James Asa Gregory
Report Of La Mina Boquillas Del Carmen, Of Coahuila, Mexico, James Asa Gregory
Professional Degree Theses
"The several denouncements embracing the group known as the Boquillas Del Carmen Mines are located in the western foothills of the Boquillas del Carmen range, and about eight miles in an air line, east of the small town of Boquillas, just across the Rio Grande River and in the state of Coahuila, Mexico"--page 1.
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.
Copper Smelting In A Rotary Furnace With Pulverized Charcoal, Elmer Cooper Heck
Copper Smelting In A Rotary Furnace With Pulverized Charcoal, Elmer Cooper Heck
Professional Degree Theses
"This process is in use at the Verde Grande Copper Company's plant, located thirty-two miles north west of Hermosillo in the state of Sonora, Republic of Mexico, and is yet experimental"--page 1.
Tests Of Efficiency Of The Rolla Power Plant, Ward Barr Mix, Edwin Bryant Thornhill, George Fred Kellogg, Clyde Rex Wood
Tests Of Efficiency Of The Rolla Power Plant, Ward Barr Mix, Edwin Bryant Thornhill, George Fred Kellogg, Clyde Rex Wood
Bachelors Theses
"The object of the test was to determine the efficiency of the separate units and of the plant as a whole under actual normal working conditions"--Object, page 1.
Pot Roasting Of Lead Ores, Ralph Robert Benedict, Edward Phillip Barrett, Frank William Harper
Pot Roasting Of Lead Ores, Ralph Robert Benedict, Edward Phillip Barrett, Frank William Harper
Bachelors Theses
"In this thesis for a starting point, we attempted a roast of straight galena with no diluent. As anticipated the results were nil. We next attempted the roast with a mixture of galena and silica, and obtained fair results. Our next experiment was to use limestone with the galena. Because of the large percentage of limestone present the results were not satisfactory. Next pyrites and limestone were used with the galena, and excellent results were obtained. We made another run, using pyrites and limestone, but increasing the per-centage of galena by 25%. This run was also very successful. From these …
Test Made On The Missouri School Of Mines Power Plant, Leland R. Walker, George Hewitt Boyer, Alfred Leo Nye
Test Made On The Missouri School Of Mines Power Plant, Leland R. Walker, George Hewitt Boyer, Alfred Leo Nye
Bachelors Theses
"The primary object of this thesis was to obtain the total efficiency of the Missouri School of Mines Power Plant"--page 1.
Development Of Power On Little Piney River, James Duncan Fowler, Frank Leroy Flynt
Development Of Power On Little Piney River, James Duncan Fowler, Frank Leroy Flynt
Bachelors Theses
"Little Piney River has its source in the southern part of Phelps County, Missouri. Its general direction is north until its junction with Beaver Creek. Then it flows nearly due west and empties into the Gasconade River near Arlington, Mo. It drains an area of approximately two hundred square miles. The slopes of its drainage area being very steep, it is subject to large and sudden rises. As it is largely a spring fed stream its minimum flow is not far below its normal stage. The stream abounds in rapids with from a few inches to a foot or more …
Mining And Milling Of A Low Grade Copper Ore, Richard Edward Armstrong, Horace Asahel Johnson
Mining And Milling Of A Low Grade Copper Ore, Richard Edward Armstrong, Horace Asahel Johnson
Bachelors Theses
No abstract provided.
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 …
Design Of A Re-Inforced Arch Over Frisco Railroad On Tenth Street, Rolla, Missouri, Don Morgan Neer
Design Of A Re-Inforced Arch Over Frisco Railroad On Tenth Street, Rolla, Missouri, Don Morgan Neer
Bachelors Theses
"Location. This bridge shall be located so that its center line will coincide with the center line of Tenth Street, so that the two (2) inside faces of the abutments will be perpendicular to the center line of Tenth Street and will be fifty-one (51) feet from the center line of the main track of the Frisco Railroad. General Description. This bridge will be built of concrete with steel rod re-inforcement, as shown on the plan. It will be one hundred two (102) feet between the faces of the abutments. The abutments shall be carried down into the rock ledge …
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.
The Development Of A Lead, Zinc Prospect, Felix Anthony Lyneman
The Development Of A Lead, Zinc Prospect, Felix Anthony Lyneman
Bachelors Theses
"The writer's object in this thesis is to devise a method of mining the ores from a well-known Chitwood Prospect, Jasper Co., Mo., so that the same will pay dividends"--Object, 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.
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.
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 …
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 …
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.
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.
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.
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.
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.
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.
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.
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.
Report On Polaris Mine, Stanley Ralston Moore
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.
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 …
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.