Digital Commons Network^™

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.

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.

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.

Common Roads, Arthur Neustaedter

Professional Degree Theses

"The subject of this thesis is on "Common Roads", meaning by "common roads", wagon-roads; which do not include roads with Trackways, as railroads"--page 2.

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

Professional Degree Theses

No abstract provided.

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, …

Metallurgic Industries Of South Missouri, Philip Gallaher

Professional Degree Theses

"The metallurgic industries of South Missouri consist chiefly of iron, lead and zinc industries. These are widely distributed over the southern counties and in many localities the works are extensive, proving in many cases to be great sources of wealth. In the production of Iron the profit is small. Yet this industry, owing to a growing demand, is steadily increasing"--page 2.

The Production Of Spelter As Practiced At The Glendale Zinc Works, Arthur Neustaedter

Professional Degree Theses

"Description of the Zinc Works. The "Glendale Zinc Works" are situated in the southern part of the city of St. Louis, on the line of the St. Louis Iron Mountain and Southern R. R. and among the iron manufacturing districts they are the only zinc works now in operation and produce a large quantity of spelter"--page 2.

The Systems Of Amalgamation, Floyd Davis

Bachelors Theses

"Mineralogists have shown that gold, with few exceptions, occurs in the metallic state, disseminated in ores or scattered throughout alluvial deposits of old river basins. Silver is quite similar in its occurrence, but it is almost universally found in combination with other elements. The means in which these metals occur forms a large factor in determining the most economical and efficient systems of metallurgical treatment"--page 1.

Hydraulic Mining, Arthur Neustaedter

Professional Degree Theses

Hydraulic-mining has undoubtedly its origin in America and principally in the west, when gold was found in 1848 it was imbedded in strata of clay, land and gravel, the question arose how should we get it out of the clay and etc.? and here is the origin of hydraulic-mining. First there was used the simple “pan”, then something better was found, the “cradle,” and then it came to the “tom”, “sluice” and lastly to “hydraulic mining”, all of these come under the head of hydraulic-mining, but the last which bears that name is resorted to only in situations where the …

Patenting Mining Claims, William R. Painter

Professional Degree Theses

"In patenting mining claims there are two sets of papers used"--page 3.

The Metallurgic Treatment Of The Iron Ores Of Southwest Missouri, Beauregard Ross

Bachelors Theses

No abstract provided.

Proposed Bridge Over Gasconade River, Frank W. Gibb

Professional Degree Theses

"This scheme for a bridge over the Gasconade River is presented as a thesis for the degree of Civil Engineer."--page 1.

The Metallurgic Treatment Of Lead Ores As Carried On In South-West Missouri, Frank W. Gibb

Professional Degree Theses

No abstract provided.

Tunnels, Ashnah B. Schrantz

Professional Degree Theses

No abstract provided.

Turbine Wheels And Water Power, Herman N. Van Devander

Professional Degree Theses

"A turbine water-wheel is one through which the water passes guided by channels either interior or exterior to the wheel its self and the walls of these channels or guides as they are termed, are placed in such positions, as to impinge the water on to the blades or wheel buckets at such an angle as will insure the greatest efficiency. The guides and buckets are usually curved in opposite directions, and are so placed with regard to each other, that the water enters the wheel with the least possible shock and leaves it with the least possible velocity. Turbines …

The Metallurgic Treatment Of The Iron Ores Of Southwest Missouri, Beauregard Ross

Professional Degree Theses

I can say nothing new upon the subject of the Metallurgy of Iron. The science has approached such a degree of perfection that very little, if anything, has been left to be said. The attention of the modem metallurgist should be devoted to the mechanical contrivances which will enable him to manipulate the work of his men to the best advantage rather than to an improvement in the process”—Introduction, page 6.

Imaginary Functions, Floyd Davis

Bachelors Theses

"The imaginary expression which occurs in common Algebra, and in all the higher departments of mathematical science, has been one of the most perplexing problems which the human mind has encountered in any age. It was studied by the early mathematicians and became a field of speculation, but developed no marked results, for it was generally considered algebraically and in the interpretation is a symbol of an impossible operation. But many of the problems arising from algebraic-geometrical analysis involving imaginaries was of such importance to mathematical and physical science that great attempts were made to establish their solution. It was …

Inter-Oceanic Transit, Loren X. Smith

Professional Degree Theses

"The feasibility of constructing a canal communication between the Atlantic and Pacific Oceans and crossing the American Isthmus has been discussed and written on since the time of Columbus but the subject has attained its present popularity only within the last few years. For several years past the press has almost constantly kept the project before the public and the indications now are that in the close of the 19th century some one of the many schemes that has been suggested will be in active operation. There has been various routes suggested for canals with and without locks. This paper …

Ore Of Certain Composition, Walter W. Wishon

Professional Degree Theses

The metallurgic treatment of an ore having the following composition:
SiO₂ 20.10
PbS 9.90
ZnS 40.25
CuS 19.75
Sb₂S₃ 4.95
Ag₂S 3.10 or 787.48 oz per ton
Undeter. 1.95
100.00

To obtain the Silver by the Chlorination and Amalgamation process. The discussion of the subject consists of the following sections:
1st Preparation of the Ore
2nd Roasting
3rd Amalgamation
4th Retorting
5th Fusion in the Bars

Location, Construction, And Drainage Of Common Roads, Edward B. Summers

Bachelors Theses

To write upon, and do justice to the subject of common roads, it is necessary that one should be familiar with every variety of them. The roads in some of the advanced and highly civilized communities are of a most admirable character; while in the new and thinly populated countries, they are found deficient in nearly all the attributes of good roads. Only a few kinds that may be in some of the most populous districts will be here designated.

The Metallurgic Treatment Of An Ore For Lead And Silver, Arthur C. Carson

Bachelors Theses

"The metallurgic treatment of an ore for Lead and Silver….

The discussion of which will consist of the following steps;

1. Preparation of ore for smelting, which consists in roasting, and of the addition of fluxes such as will produce an easy flowing slag as the ... silicate
2. The Production of Crude Lead, which will contain the Silver
3. Extraction of Silver from the Crude Lead, which includes the retorting of the zinc-silver alloy and the cupellation of the rich lead
4. The Refining of the desilverized lead"--page 1.

The Cost Of A Structure Which Is To Take The Place Of The Beaver Bridge, Rudolph C. Hoyer

Professional Degree Theses

"The subject of this treatise is the cost of a structure, which is to take the place of the Beaver Bridge.

This bridge is located on the St. L and San F. Rwy., four miles southwest of Rolla and it spans a deep valley nearly a 1000 ft. in width in the bottom of which runs a small stream The course of roadway over the bridge is N. 24 1/2 E.

The old wooden Howe Truss bridge, being no longer considered perfectly safe, on account of its age, measure was taken to supply its place with some new structure that, …

The Production Of Spelter From Zinc Blende, Lee R. Grabill

Bachelors Theses

"The problem which has been assigned to me for discussion as examination in metallurgy, is the treatment of a zinc blende from Sevier County, Arkansas; using the common Missouri or Illinois coal for fuel and the Spadra coal of Johnson County, Arkansas, as a reducing agent in the distillation process; and as clay for the manufacture of retorts, etc. that from the works at Cheltenham, Missouri, furnished by Parker, Russell & Company. Analysis of the materials used are to be given with details of processes and drawings & descriptions of machinery used; also approximate cost of furnaces, and approximate cost …

Metallurgy Of Gold, Wilton R. Brown

Bachelors Theses

"Metallurgy of Gold: Problem

Required, description of processes and machinery used in Extraction of Gold (and Silver) from earthy or siliceous ores as found in California

Ores represented by following:--SiO₂ 91.44; S(Zn,Pb)-Cu₂S 1.38; Al₂O₃, FeO &c 6.39; Au .0017, Ag₂S .12, variable in 1^st and 2^nd class ores

1⁰--The methods &c. employed in treating 1⁰ class ore (i.e. such as exceed in value $150 per ton)

2⁰--The methods &c. in treating 2⁰ class ore, such as contain less than $150 per ton.

Give in detail the chemistry of each process described; also illustrated by drawings of machinery for …

Iron Bridges, Lindsay Coppedge

Bachelors Theses

"The superiority of iron over wood as the material for bridges is now generally understood that we see no need of any discussion"--page 3.

Spelter From Blende, Wilton R. Brown

Professional Degree Theses

"Zinc Blende consists essentially of sulphur and zinc, and has the formula ZnS. When pure it contains 66.72% of zinc and 33.28% of sulphur. The ore usually contains varying amounts of iron, copper, and antimony as sulphides and also silica, lime, and magnesia...

In order to treat zinc blende for spelter or metallic zinc, the ore must be treated in a roasting furnace. The roasting is for the purposes of driving off the sulphur and converting the zinc to oxide. Owing to the density of the ore and the difficulty of expelling the Sulphur, the blende must be first crushed …

Treatment Of Gold And Silver Ores As Found In The Comstock Lode, Lee R. Grabill

Professional Degree Theses

"Statement of Problem: Metallurgy of Gold, etc.

Required, description of process and machinery used in the extraction of Gold and Silver from earthy and siliceous ores as found in California, the ores being represented by the following- SiO₂, 91.44; (Zn,Pb)+Cu₂S, 1.38; Al₂O₃, Fe₂O₃, etc. 6.39; Au, .0017, Ag₂S .12, Variable in 1st, 2nd, and 3rd class ores.

1° - The methods, etc. employed in treating 1st class ores, -such as exceed in value $150 per ton.

2° - Methods, etc. in treating 2nd class ores, such …

Fire Clays And Refractory Materials, James A. Pack

Professional Degree Theses

“Nor did the primitive metallurgists who were the first to apply this iron rock to practical use imagine, as they toiled over their unsightly furnaces made of common sun dried clay in which there could not be generated sufficient heat to reduce the iron to a liquid form, and to the top of which the smelter might reach with his hand, that in the future this metal would need to be smelted in furnaces that would reach to the tops of their very temples, and at a temperature that would defy the resistance of the firmest granite.

But yet these …

Silver Amalgamation, James A. Pack

Professional Degree Theses

"The process of amalgamation is one of the oldest known methods of extracting silver from its ores. The process arose from the finding of rich silver ores in districts where little or no fuel existed.

This method of silver extraction has been known and used for over three hundred years; but the method of pan amalgamation which came into use much later and has been so fully developed under American management is the one which we will here consider.

The process of pan amalgamation is peculiarly adapted to certain mining districts of the western territory of the United States"--page 2.