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The Design And Installation Of An Apparatus For Dehydrating The Air Which Is Used In The Blast Furnaces Of The Hanyang Iron And Steel Works And Other Suggested Improvements, Hanyang, Hupei, China, Andrew Jackson Seltzer

Professional Degree Theses

"The Hanyang Iron and Steel Works is located in the city of Hanyang, Hupei Province, inland on the mighty Yangste Kiang, a distance of one thousand seventy-five kilometers from Shanghai. The Works is at the junction of the Yangste and Han Rivers and covers several acres. The Works was established by the Viceroy Tchan and was to have been located at Shanghai, but His Excellency, the Viceroy, was transferred to Wuchang, so he decided to locate the Works in Hanyang - just on the opposite bank of the Yangste, from Wuchang ... The Works originally consisted of two blast furnaces …

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 …

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 New Copper District In Southern Arizona, Harry Carleton Chamberlain

Professional Degree Theses

"Within the last two or three years, the copper mining industry has been growing at a remarkable rate. Perhaps not so much in the output of refined copper as in the exploitation and development of new fields. The panic of 1907 left its mark only too deep on many of the then producing mines. the inflated price of copper has aroused interest in those who owned or controlled small or undeveloped mines ... One of these districts is the one to be treated of in this report. It is not a new discovery, but rather one of the oldest camps …

Surveying Practice, Edwin Richard Wash

Professional Degree Theses

No abstract provided.

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 …

Geology In The Vicinity Of Palmer, Mo., Alfred Nicks Detweiler, John Kavanaugh Forman

Bachelors Theses

"This area has been of minor importance in the production of ore on a commercial scale, the ore mined being residual in clay in openings occuring sic in dolomite and with chert, all near the surface, the mining being done by individuals who felt disposed to sink a shaft on some supposedly mineralized spot in the hope of uncovering a few tons or ore. Mining operations have been carried on intermittently for more than a century, so we are told, the early miners breaking the rock by first heating it with a wood fire, and then suddenly cooling it with …

Metallurgical Operations Of Pyritic Smelting As Carried On At Ducktown, Tennessee, Byron John Snyder

Professional Degree Theses

"The Practice of Pyritic Smelting is a comparatively new method. It has made possible the extraction of metals from very low grade ores economically. In fact, the direct smelting of sulphide ores of any sort is a very modern metallurgy. This method is extensively used in the United States and British Columbia and will prove to be very valuable in the future development of other regions. Pyritic smelting may be considered as the oxidizing smelting of pyritic ores in a blast furnace with the view to producing matte which collects the values. A short discussion of copper smelting in general, …

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 …

Report Of Herald Mine, Joplin, Missouri, Clay Gregory

Bachelors Theses

No abstract provided.

The Effects Of Co₂, So₂, And Temperatures On Blende Roasting, Monroe Farrar

Bachelors Theses

"This work deals with the effect which different temperatures and different percentages of CO₂ and SO₂ have on the speed of roasting of zinc sulphide. I selected sphalerite from the Joplin district"--Page 1.

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 …

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.

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 …

Investigation Of Hindered-Settling Ratio Of Galena And Quartz In Air, John Sloan Stewart, Ralph Daniel Killian

Bachelors Theses

"The object of this Thesis is to determine the hindred sic -settling ratio in air of Galena and Quartz, and to verify if possible the result of the work done in 1909 by W. D. Clark and R. W. Watson"--Problem, page 1.

Transportation Of Chert In Launders, Louis Joseph Porri, John Lyle Pickering

Bachelors Theses

"Water is often carried from place to place in artificial channels, such as troughs, aqueducts, ditches and canals. A launder is, specifically speaking, a trough, and it is with this that this article will treat. It is the purpose of this investigation to discover, if possible, first, the maximum carrying power of water when transporting chert; second, to find the relation existing between the velocities of different sized chert"--Introduction, page 1.

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.

A Study Of Some Assay Problems, Walter Dobbins, Charles Weaver Traughber

Bachelors Theses

"The object of this thesis is to work out some assay problems. Each problem is taken up independently, and may be considered as having no connection whatever with the others"--Introduction, page ii.

The Losses Of Gold During Cupellation Using Various Makes Of Cupels, Benjamin Harrison Dosenbach

Bachelors Theses

"There are on the market various cupels. Many of the assay-supply firms sell a "manufactured" cupel, presumably made of bone-ash. The great majority of all cupels used, are made of bone-ash in the assay office itself. The object of this work is to compare the losses of gold when the various patented, the various manufactured and the ordinary hand made cupels are used"--page 1.

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. …

Notes On The Precipitation Of Gold From Cyanide Solution, Charles Adrian Burdick, Harry Wade Connelly

Bachelors Theses

"This work was to determine the Potassium Cyanide and the Zinc consumed in the precipitation of Gold from cyanide solutions by zinc dust"--page 1.

Friction In Small Air Pipes, Albert Park, Howard Kelsey Peterson

Bachelors Theses

"In the course in Compressed Air at the Missouri School of Mines our attention was called to the fact that no reliable data could be found relating to friction losses in pipes under three inches in diameter carrying compressed air. Therefore the undersigned decided to undertake as a thesis the securing of the needed data and herein are recorded the results of our work"--page 1.

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

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.

The Preparation Of Zinc Blende For Reduction, Frederick Edward Riede, Earl Frederick Boland

Bachelors Theses

"The object of this thesis was, in the beginning, to investigate the losses which occur throughout the process of extracting zinc from its ore. Owing to the length of time required in roasting and to the short period of time to do the work, we were compelled to limit ourselves to the roasting of zinc blende or the preparation of zinc blende for reduction"--page 3.

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 …

Some Ore Deposits In Maine And The Milan Mine, New Hampshire, William H. Emmons

Maine Collection

Some Ore Deposits in Maine and The Milan Mine, New Hampshire

by William H. Emmons

Department of the Interior, United States Geological Survey - Bulletin 432

Washington, D.C. (1910).

Contents: Introduction / Geology / Ore Deposits / Descriptions of Mines / Mines of Hancock County / Mines of Washington County / Mines in Somerset and Oxford Counties / Milan Mine, New Hampshire / Index

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

Bachelors Theses

No abstract provided.

Ore Dressing Laboratory For The Missouri School Of Mines And Metallurgy, Rolla, Missouri: Design, Description, Drawings For Erection, Bills Of Material, And Specifications, Boyd Dudley Jr.

Masters Theses

"The work of preparing suitable drawings and specifications for the construction of the new Ore Dressing Laboratory of the Missouri School of Mines and Metallurgy was begun about August 15, 1909. At that time general plans, as shown in drawings No. 1 and No. 2, were drawn up and submitted for approvaleaf With certain minor alterations, to be mentioned under the section on specifications, these plans will be followed in the installation of machinery. Other detail drawings were made by the class in Ore Dressing Problems under the direction of the writer during the school term ending March 12, 1910. …