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Articles 1021 - 1050 of 1188
Full-Text Articles in Mining Engineering
Geology Of A Carboniferous Outlier In Lawrence County, Missouri, Maurice Merton Albertson
Geology Of A Carboniferous Outlier In Lawrence County, Missouri, Maurice Merton Albertson
Bachelors Theses
No abstract provided.
The Design Of A Sampling Mill To Treat A South East Missouri Lead Ore, Robert Nathaniel Copeland, Edwin Cook Mcfadden
The Design Of A Sampling Mill To Treat A South East Missouri Lead Ore, Robert Nathaniel Copeland, Edwin Cook Mcfadden
Bachelors Theses
"The purpose of the work that was undertaken in preparing this thesis was to provide plans and specifications for a sampling mill to be erected by the St. Louis Smelting and Refining Co. at their plant near St. Francois, Mo... It was intended at the outset to design the plant completely and to provide full working drawings and specifications for all parts of the mill. On account of the lack of time, however, it has been found necessary to somewhat reduce the amount of work. As a result only general plans and specifications with a few of the more important …
Underground Records, Robert Hardy Bedford
Underground Records, Robert Hardy Bedford
Professional Degree Theses
"It may save confusion to now state that "Underground Records" is used in sense of information regarding labor, supplies, and output of the underground proper, in distinction from "Costs" - a term here used for results of the sum total of all records after they have passed through the hands of the book keeping-accounting staff. The essentials of underground records are more or less carefully collected by all mining companies of any importance, but are too often, before they have come under the eyes of the mine management in intelligible or suggestive form, obscured by the addition of a "witches …
Method Of Obtaining And Preserving Data On Churn Drill Holes, Ira Lee Wright
Method Of Obtaining And Preserving Data On Churn Drill Holes, Ira Lee Wright
Professional Degree Theses
"In prospecting for copper by means of churn drills it is absolutely essential that accurate methods of sampling be employed if any dependence is to be put upon the results. Of equal importance is the recording and preservation of data regarding each hole after results are obtained. This applies to such information as location and elevation of holes, depth, water level, geology etc as well as to the assays of the samples. Future underground development will be guided by information obtained from the drill holes and any incompleteness in the records will cause uncertainty in the development of the mine. …
Fluorspar Mining In Kentucky, Walter Coffran Richards
Fluorspar Mining In Kentucky, Walter Coffran Richards
Professional Degree Theses
"The mining of fluorite, or fluorspar in Western Kentucky is one of the chief mineral industries of that State. As the number of mines and prospects is very great, a thorough treatise on the geology, mines, and methods of this district would make a large volume. This thesis will deal, however, with only a small part of the district, in which the mine operated by the author is located. Before going into detail, it might be well to mention a few points relative to the fluorspar industry in general. To the average person, fluorspar seems to be unknown. In fact, …
The Determination Of The Best Treatment For A Certain Mexican Silver Ore, Sumner Cooley Macomber
The Determination Of The Best Treatment For A Certain Mexican Silver Ore, Sumner Cooley Macomber
Bachelors Theses
No abstract provided.
Topography And Geology Of The Panther Bluffs Area, Roswell H. Maveety, Joseph Stewart Irwin
Topography And Geology Of The Panther Bluffs Area, Roswell H. Maveety, Joseph Stewart Irwin
Bachelors Theses
No abstract provided.
A Comparative Test Of The Air Consumption Of Rock Drills, John Elmer Schultz, Christian R. Miller
A Comparative Test Of The Air Consumption Of Rock Drills, John Elmer Schultz, Christian R. Miller
Bachelors Theses
"The aim of this thesis is an attempt to determine the relative efficiency, of four standard types of rock drills, as to air consumption. The air consumption was based upon the cubic inch of rock drilled by each machine. The orifice method of measurement being utilized, in connection with the exhaust to determine the desired consumption"--page 1.
Design And Details Of Construction For A 50-Ton Amalgamation, Concentration, And Cyaniding Mill, Hector Julio Boza, Carlos Enrique Elmore Y Guerra
Design And Details Of Construction For A 50-Ton Amalgamation, Concentration, And Cyaniding Mill, Hector Julio Boza, Carlos Enrique Elmore Y Guerra
Bachelors Theses
"Our problem is to design and provide for the construction of a mill to cyanide a certain gold ore. Full laboratory experiments have been made on the ore and on the results of these tests together with the consideration of the conditions of locality, transportation facilities, and labor available we have based the design of our mill. Our aim has been to so design the mill that the capacity may be increased without necessitating any change of arrangement in the part already constructed. To increase the capacity up to 100 tons practically the only additional equipment required will be in …
A Test Of The Municipal Light And Water Plant Of The City Of Lebanon, Missouri, Roy Elliott Sprague, GermáN GarcíA Lozano, Shiv Raj
A Test Of The Municipal Light And Water Plant Of The City Of Lebanon, Missouri, Roy Elliott Sprague, GermáN GarcíA Lozano, Shiv Raj
Bachelors Theses
"The power plant tested for this Thesis is located at Lebanon, Missouri, on the St. Louis and San Francisco Railroad, and belongs to the City of Lebanon. The plant consists of two Brownell horizontal tubular boilers with a shell six feet by 18 feet, and each containing 70 four-inch tubes. The stack is 36 inches in diameter and at the time of the test, was broken off so that it was about 50 feet high. The boilers were fed by a steam pump, the water passing through a Cochrane heater. The engine equipment consists of one 10 by 12 inch …
Mine Map And Geology Of Saltpeter Cave, Milan Harrison Detweiler, Frank Edgar Townsend
Mine Map And Geology Of Saltpeter Cave, Milan Harrison Detweiler, Frank Edgar Townsend
Bachelors Theses
"The date of discovery of Saltpeter Cave is not known and there is no way of determining it. Numerous accounts are given of the cave by the oldest settlers in the neighborhood, some of which are both startling and interesting. for instance, it is reported that the soldiers of the Confederate army visited this cave for the purpose of securing guano from which to extract saltpeter for use in the manufacture of gunpowder. This may be the origin of its name"--Geology, Page 1.
Friction Of Air In Small Pipes And Fittings, Bejamin H. Cody, Ernest J. Allen
Friction Of Air In Small Pipes And Fittings, Bejamin H. Cody, Ernest J. Allen
Bachelors Theses
"The work of Park and Peterson during 1909-10 at the Missouri School of Mines revealed the fact that more data are needed concerning the loss of pressure due to elbows and other fittings of pipes under three inches in size. Accordingly, we decided to undertake the continuation of their work as a thesis. The apparatus used was practically the same as used in the previous thesis"--page 1.
Surveying Practice, Edwin Richard Wash
Surveying Practice, Edwin Richard Wash
Professional Degree Theses
No abstract provided.
A Study Of The Efficiency Of Discharge Of Classifier Spigots, Harmon Edwin Minor, James Bunten
A Study Of The Efficiency Of Discharge Of Classifier Spigots, Harmon Edwin Minor, James Bunten
Bachelors Theses
"A knowledge of the amounts of water and sand that will be discharged by classifier spigots under various conditions is of considerable importance in the design of classifiers. Suppose it is desired to discharge fifty tons of sand with an average diameter of 2 m.m. through a spigot orifice, the sand being mixed with 100 tons of water and the entire amount of the mixture being discharged in ten hours from the spigot, which is submerged to a depth of two feet under the water. How large a spigot is required? Problems such as this are by no means uncommon. …
Nichrome As A Rheostat Resistance, George C. Vogt
Nichrome As A Rheostat Resistance, George C. Vogt
Bachelors Theses
"Nichrome wire is a high resistance alloy, and is not appreciably effected in its resistance by changes of temperature to which it may be subjected in practice. This was shown by the low temperature coefficient obtained. Nichrome does not deteriorate by heating, as shown by torsion-tests after current has been passed through wire. German-Silver however, becomes brittle. Nichrome in a moist atmosphere corrodes rapidly, but in a relatively dry atmosphere, and heated red hot, no signs of oxidation or corrosion could be seen. By all results obtained as to strength, resistance, etc., Nichrome is superior to German-Silver as a resistance …
A Study Of The Electrical Resistance Of Coke, Gas-Carbon, And Kryptol Under Varying Conditions, Benton Franklin Murphy, Reuben Conrad Thompson
A Study Of The Electrical Resistance Of Coke, Gas-Carbon, And Kryptol Under Varying Conditions, Benton Franklin Murphy, Reuben Conrad Thompson
Bachelors Theses
"This thesis was undertaken to make a study of the resistance of coke, gas-carbon, and kryptol when used as resistors in the electric resistance furnace, which daily is becoming of increasing industrial importance. It would appear at first sight that the calculation and design of an electric resistance furnace would be an extremely simple problem, since the whole effect is the change of electrical energy into heat according to Joule's Law; but this is by no means the case, as the resistance of the resistor may change enormously during the run of the furnace. The great difficulty met with is …
Report Of Herald Mine, Joplin, Missouri, Clay Gregory
Report Of Herald Mine, Joplin, Missouri, Clay Gregory
Bachelors Theses
No abstract provided.
The Design Of A Mill To Treat A Certain Gold-Silver Ore By Cyanidation, Emilio Diaz, Robert William Mackey
The Design Of A Mill To Treat A Certain Gold-Silver Ore By Cyanidation, Emilio Diaz, Robert William Mackey
Bachelors Theses
"The problem under consideration is the design of a hundred-ton mill for treating silver ores by cyanidation... The Sulphur is partly combined as Sulphide and partly as the Iron Sulphates, FeSO₄ and Fe₂(SO₄)₃. To determine the best method of procedure, preliminary tests were run on lots of 100 pounds each, this being crushed in a sampling grinder and classified into sand a slime"--Introduction, page 1.
Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg
Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg
Bachelors Theses
No abstract provided.
Modern Cyanide Practice, Harvey Edson Smith
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 …
Specifications And Bill Of Material For Roaster In Ore Dressing Laboratory Of Missouri School Of Mines, John Dee Harlan
Specifications And Bill Of Material For Roaster In Ore Dressing Laboratory Of Missouri School Of Mines, John Dee Harlan
Bachelors Theses
"POSITION OF ROASTER. In the North West corner of the East wing of the Metallurgy Building. The space allowed is nineteen feet (19ft) long by fifteen feet (15ft) wide. The floor is of concrete. The walls are of brick. OBJECT OF ROASTER. to give either an Oxidizing or a Reducing Roast; to partially roast the ore or to give it a dead roast"--SPECIFICATIONS, page 1.
Some Geology On The Weingarten Quadrangle, Missouri, John Whittlesey Bodman
Some Geology On The Weingarten Quadrangle, Missouri, John Whittlesey Bodman
Bachelors Theses
"The work in this report covers about 90 square miles situated in the east and middle portion of Ste. Genevieve County, Missouri, between townships 35-37 north and ranges 7-9 east. It is termed the Weingarten Quadrangle by the State Geological Survey...The body of the thesis is detailed areal mapping. All formations and structural features are put on a topographic map with a scale of 1/62,500, contour interval 20 ft., datum mean sea level"--page 1.
The Concentration Of A Pyrolusite Ore, Frank O. Blake, Van Hoose Smith
The Concentration Of A Pyrolusite Ore, Frank O. Blake, Van Hoose Smith
Bachelors Theses
"This is the history of an attempt to produce from a pyrolusite ore, a material sufficiently rich in manganese to be of value in the various industries such as the making of speigeleisen and ferro-manganese, the glass manufacturing, and the chemical industries. The greater part of the manganese used in the United States comes from Brazil, India and Russia. Our American ores are, in general, low grade and requires various preliminary concentration to fit them for use. Although we possess in this country a great deal of manganese ore, which could be put into suitable condition for the market, there …
The Determination Of Friction-Coefficients Of Water In Small Iron Pipes, O. W. Holmes, Ernest Wander
The Determination Of Friction-Coefficients Of Water In Small Iron Pipes, O. W. Holmes, Ernest Wander
Bachelors Theses
"This thesis was undertaken to determine accurately the coefficients of friction of water, flowing at varying velocities in small iron pipes and elbows. It was the intention to obtain the condition of pipes and elbows similar to that met with in general practice"--Introduction, page 1.
Description Of The Surveys Of Portions Of The South And East Boundaries Of The Yellowstone National Park, Albert Babbitt Bartlett
Description Of The Surveys Of Portions Of The South And East Boundaries Of The Yellowstone National Park, Albert Babbitt Bartlett
Professional Degree Theses
"This Thesis will be generally descriptive of the points connected with obtaining the contract under which this survey was made, the outfit necessary for the part doing the work, the personnel of the party, and the duties of each man, the engineering instruments employed in the survey, the country through which the Boundary lines run and the difficulties encountered, the writing of the field notes, and is accompanied by illustrations"--Introduction, page 6.
Mining, Concentrating, And Smelting Of Lead And Zinc Ores In Hunan Province China, Tsik Chan Tseung
Mining, Concentrating, And Smelting Of Lead And Zinc Ores In Hunan Province China, Tsik Chan Tseung
Professional Degree Theses
"The mine in question lies in the western part of Shangning District, in the province of Hunan. It is about one hundred and twenty miles south of Changsha, the capital of the province. It may be reached by a four days' trip from Changsha on foot. One can also reach there by native boat in a few days, depending on the wind and the stage of water. The mine is about three miles from the Siang River. This river has its sources in the northern part of Kwangtung province and in the eastern part of Kwangsi province. It flows north-ward …
An Investigation Into The Causes Of Accidents To Shot Firers In Bituminous Coal Mines, George Edwin Lyman
An Investigation Into The Causes Of Accidents To Shot Firers In Bituminous Coal Mines, George Edwin Lyman
Professional Degree Theses
"In many cases the explosions which kill so many shot firers can be directly attributed to the presence of gas, or coal dust, but often there will be explosions of terrific violence in mines which are so wet as to preclude the possibility of dust being held in suspension in the air current, and where no gas has been detected in the history of the mine. Such an instance came under the writer's observation some time ago in which his opportunities of investigation were excellent, and the results of which may perhaps throw light on other apparently mysterious explosions of …
Dredging, Swan River, Colorado, Henry William Lohman
Dredging, Swan River, Colorado, Henry William Lohman
Professional Degree Theses
"Operations for the extraction of gold from the gravels of this river, were started about ten years ago, at which time it was attempted by means of hydraulic elevators, later by means of the early type dredge, Risdon design, of which three were installed, and later still, an early type Bucyrus Dredge. These all resulted in failure, some alleged to have been due to impossibility of reaching bed-rock; small yardage capacity; and fraility [sic] of design. these have been overcome in the latest type of dredge constructed by the Bucyrus Company, description of which follow later. Dredging here, differs from …
Reheating Compressed Air By Internal Combustion, Norman L. Ohnsorg
Reheating Compressed Air By Internal Combustion, Norman L. Ohnsorg
Professional Degree Theses
"The perfection of a reheater of high efficiency has been discussed and experimented upon for a period of time nearly as long as the application of compressed air itself. At the present time all the reheaters are by the external combustion of fuel as in the case of stoves or furnaces, where the air pipes are carried through the flames or is surrounded by steam pipes, or by some similar contrivance, all of which the heating efficiency of the fuel upon the compressed air is low, due to the great loss by radiation, and hot escaping gases. Reheating compressed air …
A Study Of The Losses Occurring In The Milling And Smelting Of Missouri-Kansas Zinc Ores, Horace T. Mann
A Study Of The Losses Occurring In The Milling And Smelting Of Missouri-Kansas Zinc Ores, Horace T. Mann
Professional Degree Theses
"At the present time the greater portion of the zinc mined in the Joplin District, is taken from what is known as the sheet-ground. What percentage of the zinc bearing rock is extracted or what percentage is left in the ground when the mine is abandoned, which owing to caving and other causes can not be recovered at some future time, is not known. It is to be hoped that the State Geological Survey will in the near future be able to take up the investigation of this subject. Until they do it will be impossible to make a reliable …