Digital Commons Network^™

The Manufacture Of Portland Cement, Herman C. Cowen

Professional Degree Theses

"The principal characteristics which, in the process of manufacture, sharply and clearly distinguish Portland cement from Limes, Hydraulic Limes, and other Hydraulic cements, are the necessity for carefully proportioning and finely grinding the raw materials to insure a homogenous [sic] mixture, and the extremely high temperature at which it must be burned in order to insure a sound a trustworthy product"--page 1.

Studies In Tellurium, Victor Hugo Gottschalk

Bachelors Theses

No abstract provided.

Hydraulic Air Compressors, Euart Carl Torrence

Bachelors Theses

No abstract provided.

The Electrolysis Of The Water Of A Copper Sulphate Solution, Ralph Barker

Bachelors Theses

"The idea prevails generally, that when an electric current is passed through a copper sulphate solution, the water will be electrolysed sic when the difference of potential between the electrodes reaches about one and one-half volts. The object of the experiments detailed below was to determine whether or not the density of the solution has any effect on the electrolysis of the water, and if any such existed, to find out if there was any relation between them"--page 1.

Derivation Of Some Empirical Formulae, Showing Relation Between Breaking Strength And Various Functions Which Enter Into Cement Testing, Arthur D. Terrell

Bachelors Theses

"Although we find a great many results of experimental work in cement testing, and some curves plotted, there seems to have been very little attempt made toward fitting equations to these curves. This then leaves an opening for original investigation. During my experiments quite a variety of interesting points have been made manifest. Most of them are of no practical benefit, but merely of interest in themselves. My work has been on a few of the most important ones, which will be given subsequently"--page 1.

A Day In The Estimating And Designing Room Of A Bridge Contractor, Felix John Kersting

Professional Degree Theses

"The following designs are supposed to be made for the contracting department of a bridge shop or contracting firm, with a view of being submitted in competition. The competitors in the field of structural steel in this Western Territory are as numerous as in the East, though most of the shops are located there. There are small shops in St. L., Chicago, Minn., Milwaukee and points in Ind. and Ohio. The American Bridge Co. fabricates 60% of the structural steel now used in this country"--page 6.

Some Experiences With A Pan Amalgamation Mill, Guanacevi, Mexico, Arthur J. Stewart

Bachelors Theses

"The work of the chemist and assayer at a pan amalgamation mill is cheifly sic routine work. The work of one day differs, generally, very little from the work of an other day. But occasionally some contingency arises which taxes his ability to the utmost"--page 2.

Design Of A 240' Through Span Railroad Bridge: Including Analysis Of Stresses Due To Concentrated Wheel Loads, Design Of Individual Members, And Drawings Showing Stresses, And Details, L. C. Torrence

Bachelors Theses

"The Span length will be 240' center to center of end pins. Truss to be square ended, Track straight. Live load to consist of two engines, concentrating 289 tons over a length of 104' followed by a uniform train of 2.1 tons per linear foot"--Page 1.

Hydraulic Separation, Albert Edwin Eardley, John Simpson Cameron

Bachelors Theses

"Before beginning a discussion of the various experiments performed with the hydraulic separators in the Laboratory of the S. of M., a brief statement as to the principle upon which their working depends, and their functions in the dressing of ores should be given. The crude ore when first delivered from the mine is usually not of sufficient richness to be economically handled by the smelters; it therefore becomes necessary to eliminate as far as possible that part of the ore which is of no material value, and among the various forms of apparatus now in use for this purpose …

Contact Plane Concentration, John A. Rogers, George Walter Dean

Bachelors Theses

"Contact plane concentration depends upon the principle that a thin sheet or film of water flowing over a plane surface may be so adjusted that its quantity and velocity are just sufficient to bear away the lighter particles of gangue, leaving behind only the heavier particles of the mineral to be concentrated, adhering by friction to the plane, the concentrates being removed by any convenient method. Thus we see it is best adapted to the concentration of minerals having widely differing specific gravities but may be used for the concentration of all ores and minerals with any specific gravity whatsoever"--page …

Water Supply Of Rolla, Missouri, Perry B. Anderson, Felix John Kersting

Bachelors Theses

"An essential feature of a prospering town is a system of water supply, to protect property from losses by fire and to furnish water for domestic use. Rolla, a town of about fifteen hundred inhabitants, is without a proper water supply, in consequence of which it has suffered many losses to property, which could have been averted, or at least diminished, had the proper protection been at hand. At present the only fire protection the business part of town has, is derived from one large cistern placed on the principal street, while the protection for the residence portion, is derived …

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 …