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Limitations Of Sizing In Concentration, Walter G. Martin

Bachelors Theses

"All ore reaching the mine mouth consists of two portions, the portion containing the mineral which is valuable, and the gangue or worthless portion. The ultimate object then of concentration is the complete separation of these two portions and in the cases when more than one mineral exists with the gangue, to separate the different mineral products from each other"--page 4.

Mineral Land Survey, Claude D. Grove

Professional Degree Theses

"Field notes of the survey of the mining claim of the Sylvanite Gold Mining company known as the Ready Cash, Gold Bug, Shamrock, Midland and Cyclone Lodes, Cripple Creek Mining District, El Paso and Fremont County, Colorado"--page ii.

White Lead, Evans Walker Buskett

Bachelors Theses

No abstract provided.

Coke, Temple Dyer

Bachelors Theses

"Coke in general is applied only to the product got from bituminous coal by driving off volatile matter and cementing the coal into a localities; a small deposit being found near Richmond Va."--page 1.

Crushing Machines, Samuel J. Gormly

Bachelors Theses

"Crushing machines may be divided into: crushers, rolls, and pulverizers. Ore as it comes from the mine is usually in larger lumps which require breaking up preparatory to the subsequent treatment it may receive. For this purpose mechanical means must be employed, and the following pages are intended as a rational treatment of the most approved methods, in ore crushing at the present day"--page 1.

The Effects Of Temperature Upon Cement Mortar, Herman C. Cowen, Phillip Florreich

Bachelors Theses

"Probably no material in use by the Engineering profession at the present time has been subjected to more careful and rigid tests by expert Engineers than our hydraulic cements, both natural and artificial. While the manufacturer and use of cements in America is of comparatively recent origin, this industry is fast assuming enormous proportions, and the use of cement is fast displacing many of our more common building materials. Its use in our more important structures has created an increasing demand for the best quality of cements, and the manufacturers have not been slow to comply with this demand"--page 1.

A Complete Design Of A 210 Foot R.R. Bridge, John Edward Kirkham

Bachelors Theses

"I have divided the subject into two division, viz. Part I and Part II. Part I treats of the maximum stresses and the methods employed in finding them. Part II. treats of the design of the members to resist the stress"--Preface, page ii.

Producer Gas, Edward P. Dwyer

Bachelors Theses

"Producer gas, so named owing to being produced in special forms of apparatus known as Producers. The fuel is decomposed into combustible gases, whereby most of the C is burnt to CO, whilst the H either remains free, or is converted into carburretted Hydrogen. Directly above the grate carbonic anhydride is formed but thus is rapidly converted into carbonic oxide; reaction as follows: CO₂ + C = 2CO.

Amongst these heavy carburetted hydrogen (C₂H₄) is that which principally increases the value of the gas as fuel and the drier the fuel used the more of the gas is produced. A …

Designing Wire-Rope Tramways, George W. Herdman

Professional Degree Theses

"Tramways are divided into two systems viz.: the Bleichert system and the Hodgson system.

The Bleichert System: In this system the cable is fastened to the supports by means of clamps, and the loads travel on this cable.

The loads are attached to an endless rope or cable which passes around a wheel located at each terminus of the line, one of which is revolved by an engine if the incline is not steep enough so that gravity will produce motion"--page 2.

Determination Of The Hydraulicity Of Local Lime-Stone, Claude D. Grove

Bachelors Theses

"I took as the subject of my thesis the hydraulic properties of the Lime Stone of this vicinity and confined my researches to two of the larger Lime Stone Quarries about one mile South West of Rolla"--page 1.

On The Fire Assay Of Gold, Silver, And Lead, Claude D. Grove

Bachelors Theses

No abstract provided.

Russell's Lixiviation Process For Silver Ores, Frank L. Tyrrell

Professional Degree Theses

"It has long been known that there are many ores worked in which a large per cent of silver and gold are continually lost, either in tailings or slimes. As far back as 1848 Dr. Percy suggested the extraction of silver from argentiferous ores, by its conversion into the chloride. The chloride was treated with sodium hyposulphite"--Russell's Process, page 1.

The Cyanide Process For Gold, John C. Reid

Bachelors Theses

"Since the discovery of Cyanogen in the latter part of the 18th century records of many experiments are in existence, showing, that at various periods, exhaustive researches have been made, in which the point at issue was to investigate that property which now constitutes the foundation of what is known to Metallurgical Science of today as The Cyanide Process, vis. The solvent power of alkali cyanides on gold & silver"--page 2.

Proposed Water Works For Rolla, Frank L. Tyrrell

Professional Degree Theses

No abstract provided.

A Concrete Culvert, Fayette Alexander Jones

Professional Degree Theses

"Before entering into the especial subject for which this paper is intended, it is, perhaps, best to give a few prefatory remarks, as to what Concrete really is, the method and manner of its formation and it application in foundations and engineering structures.

Concrete may be defined as a species of artificial stone.

Its ingredients may be classified into two parts, viz:

First, the matrix which is either lime or cement, or a mixture of both.

Second, the aggregate consisting of small broken stone gravel, broken bricks, shells, etc"--A Concrete Culver, page 1.

Aluminum, Edward Mackey Johnson

Bachelors Theses

"Ores: Cost of Production: Alloys. It is not the purpose of this thesis to discuss all the ores in which Al is found, but to describe rather fully the ores from which Al is obtained: such as Bauxite and cryolite. In regard to the alloys only the principal ones will be considered and described, especially the Al-bronze which is a very important alloy of copper and Al"--page 1.

Problem For Examination In Metallurgy, Herman H. Schwarz

Professional Degree Theses

"It is required to furnish plans, specifications and estimate for a Flintshire furnace, capable of smelting 2100 pounds of good galena, per shift of 8 hours. Give two drawings showing elevation and plan, drawn to a scale of 1/2 inch to the foot.

Fire brick, red brick and iron to be shown in colors. Estimates must cover both iron and brick work"--Problem to be Solved, page 2.

Production Of Spelter From Calamine, Merritt W. Yeater

Professional Degree Theses

Calamine is one of the most important ores of Zinc and together with the silicates with which it is almost always associated is extensively employed for the production of Zinc. Smithsonite formerly called calamine when pure, consists of Zinc oxide and carbonic acid containing 52 percent of Zinc. It has a specific gravity of 4.2, hardness 4.5m and color is from pale yellow to green.

The silicate when anhydrous called Willemite, contains 58 percent of Zinc, specific gravity 4, hardness 5.5, and color from white to gray or pale yellow.

When hydrous it is called Calamine, specific gravity 3.16 to …

The Ore Knob Copper Process, Oscar Lachmund

Professional Degree Theses

"The works of the Ore Knob Copper Company are situated in the County of Ashe in the north-western part of the state of North Carolina, about ten miles from the Virginia line at an elevation of 4000 feet above the sea.

The works are 45 miles from the railroad, which makes the transportation very difficult. These unfavorable conditions make it necessary for the owners of the mine to smelt their ores and to send to market nothing except the metal, which alone will bear the cost of transportation. The mine was opened previous to 1860, but has only been worked …

Mine Opening And Timbering, George W. Cole

Masters Theses

No abstract provided.

Tunnels And Tunneling, James E. Fulcher

Professional Degree Theses

"A tunnel is defined as a sub-terranean or sub-aqueous way, for purposes of passage. The term is also applied, in mining, to horizontal excavations, such as are commonly called drifts, headings, adits, etc., and used as underground roads, or passages for water or air.

Tunneling, at the present day, has become of such importance, that it is in its-self a profession.

The subject of Tunnels and Tunneling properly treated would require a large volume, but taking into consideration the time and space allotted to the preparation of this thesis, I shall be brief; and in order to treat it to …

Dams And Damming, Jay C. Cullings

Bachelors Theses

"Dams in general may be divided into the three distinctive titles of Coffer Dams, Weirs, and Receiver dams"--page 2.

Extraction Of Silver By The Wet Way, Justo Garcia Martinez

Bachelors Theses

"The great variety of ores in which silver occurs, usually makes it necessary to employ complicated processes for its extraction.

The extraction of the precious metal admits of two general processes viz. The Dry, and Wet Way and as I have chosen the latter for the subject of my thesis, we will be dispensed with the Dry Way, and will try and give all the processes and forms in which silver is extracted by the Wet Way"--page 1.

Leaching Processes For Silver Extraction, Phil Van Frank

Professional Degree Theses

"The leaching process for the extraction of silver are comparatively modern, being introduced in 1849. They belong to a period in which the metallurgist has brought to his aid knowledge derived from chemical research. Under favorable circumstances leaching procedures process many advantages over amalgamation or smelting. For successful use the ores treated for silver must not contain large per cents of lead, zinc, antimony or arsenic. The objections to these bodies will be named later on. When silver is extracted by smelting or amalgamation, a costly plant is necessary, which requires constant repair and in time wear out and be …

Smelting Processes For Silver Extraction, John R. D. Owen

Professional Degree Theses

"The base metals used for the extraction of silver from its ores by smelting are lead and copper, and the different methods employed may be accordingly classified under the general headings of "extraction by means of lead" and "extraction by means of copper"--page 3.

A Thesis On The Improvement Of Western Waterways, Fremont Wilson

Bachelors Theses

"There is no subject that falls with the province of the engineer's art, that presents greater difficulties and more uncertain issues than the improvement of rivers"--page 2.

Limes, Mortars, And Cements, Curtis Alexander

Professional Degree Theses

"Lime, calcic oxide, or quick-lime contains 40 parts of the metal calcium and 16 of oxygen by weight and has a specific gravity, depending on its porosity from 2.3 to 3.8. It is a white alkaline earthy substance, quite infusible and is the only oxide of calcium. It is obtained pure by heating pure calcic carbonate to full redness; which expells the carbonic anhydride"--page 1.

The Metallurgic Treatment Of An Ore For Gold, Silver, Lead, And Copper, William M. Claypool

Professional Degree Theses

No abstract provided.

Stresses In Suspension Bridges, William M. Claypool

Professional Degree Theses

"A suspension bridge is one in which the roadway over the stream or span to be crossed is suspended from chains or wire ropes.

A suspension bridge consists of the towers or piers over which the main chains or cables pass; the anchorages to which the ends of the cables are attached; the main chains or cables from which the roadway is suspended; the suspending rods or chains which connect the roadway with the cable and the roadway.

The sub-structure consists of the foundations, piers &c. The super-structure consists of the roadway and the chains or cables"--page 1.

Interoceanic Canal Projects, Frank W. Wilson

Professional Degree Theses

"The construction of a canal to connect the Atlantic and Pacific Oceans has been discussed since the discovery of the New World and the whole world has only been waiting until some feasible and economical plan should be offered by which this construction could be made.

The narrow neck of land lying between the continents of North America and South America seems especially adapted to this purpose and has for years tempted exploring parties thither to seek for a practicable canal route. Of late years however another scheme has been proposed which surpasses in magnitude and in economy as well, …