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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 …

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.

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 …

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 …

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 …

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.

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 …

Illustration Of The Concentration And Flintshire Furnace Treatment Of Lead Ores At The Desloge Mines, Missouri, A. H. Ohmann-Dumesnil

Professional Degree Theses

"The Desloge Mines, the subject of the present thesis, are situated in Township 37 North and Range 4 East, St. Francois Co. Mo. and are directly north of the St. Joe mines. They are 10 miles distant, in a north-easterly direction, from Cadet, a station on the St. Louis, Iron Mountain and Southern Rail-Road 57 miles from St. Louis. hough Cadet is insignificant in point of population, still as a shipping point, it ranks high among those in South East Missouri; since it is the depôt and entrepôt for the Desloge, St. Joe and Old Mines....

The subject of lead …

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.

Maramec Bridge, Thomas H. Millsaps

Professional Degree Theses

"Bridge-building, as a science, is comparatively of recent date, for relating to now, of what may be called ancient bridges, do we read of them having been mathematical calculations, determining the strains upon the constituent parts of the bridge structure. This very necessary operation seems to have been entirely omitted. This was, probably, because to that time, there had been no thoroughly scientific investigation, of the new and beautiful subject of scientific bridge-building. At the present time, we determine with a minuteness the strain thrown upon any part of a bridge. We are thus enabled to give the proper dimensions …

S. Y. & F. G. R. R., Thomas H. Millsaps

Professional Degree Theses

"The road begins at the intersection of the east line of the Stockyards stalls, with the Saint Louis and San Francisco Rail Road. In this road, which is 9735 feet long, there is six pieces each of alternate curved, and straight track. The first piece of track, which is curved, is a 6⁰ curve, to the right (going westward) and contains 13 chords of 100 feet.

Following this is a tangent of 400 feet. And then in succession: A 10⁰ curve, to the left; 10 chords; a tangent of 100 feet a 10⁰ curve, to the right, 8.5 chords; a …

Project For The Treatment Of An Iron Ore, James A. Pack

Professional Degree Theses

"So great is the degree of perfection that marks the various processes of iron production that it seems almost useless to essay to further study a subject which has received the best thoughts and lifetime labors of the greatest metallurgists of all ages. Yet as we believe that there are still isolated cases whose various conditions have not received that consideration necessary to the most economical production of the pug; and believing that a most perfect knowledge of these conditions is essential to the final perfection of the metallurgy; and knowing further that a wide extended interchange of experience and …

Iron Ores And Associates At Buckland's Bank, Sec. 20. T. 37. R 8, W, Phelps Co. Missouri, Oscar Garvens

Professional Degree Theses

"The Iron deposit locally Known as "Bucklands Bank" is situated in the south half of Sec. 20. T. 37 R. 8 west Phelps County Missouri, about four (4) and a half (1/2) miles west of Rolla and on the line of the Atlantic and Pacific R.R.

It was opened by Sen. T. C. Buckland of St. Louis in 18--, but subsequently was leased to Mr. Wm. James of St. James, who shipped the ore for treatment at the Ozark Furnace five and a half (5 1/2) miles further westward on the railroad.

The deposit is classified by Schmidt* as a …

Profile Of The A. & P. R. R. From Rolla Depot, 7000 Feet Westward, Thomas H. Millsaps

Professional Degree Theses

"On Monday, May the 15th, 1876, this Project was begun, by the measurement of the 7000 feet, and establishment of every 500 feet point.

In this 7000 feet of road there is three curves and four pieces of straight track"--Page 3.

Limes, Mortars, And Cements, Cyrus G. Emerson

Professional Degree Theses

"Lime, considered as a building material, is not usually regarded as comprehending three principal varieties - viz: Common or air lime, Hydraulic lime, and Hydraulic cement.

The common or air lime, is so called because the paste made from it with water will harden only in air. Lime is made by burning limestone in kilns suitably arranged for that purpose. Two classes of such kilns are in general use; the intermittent or flare kiln and the draw or perpetual kiln."--page 1.

Beaver Bridge, James E. Mcgrath

Professional Degree Theses

“The Little Beaver Bridge is situated on the A. & P. R. R., 3 ¾ S. W. of Rolla it is built on the “Howe Truss” plan and spans a valley through which flows the “Little Beaver Creek” - it has two approaches (stringers supported by trestles), the length of the northern one is 38 ft., while that of the southern one is 35’5”. The bridge is composed of 5 spans and is supported on 6 piers; the length of the bridge proper is 687’ 2”, with the abutments it is 760’7”. The piers are of sandstone and have a …

Copper Ores And Deposits Of Shannon County, Missouri, John D. Greason

Professional Degree Theses

"The deposits of copper at present opened in shannon County belong to the Consolidated Land Company of Missouri. They are situated in the N.W. 1/4, N.E. 1/4, Sec. 36, Town. 29, Range 4, about one and a half miles south-westerly from Emminence, the county seat of Shannon County. The deposits were first opened and operated upon by Jos. Slater, who took out and shipped about 1500 tons of the ores to Swansea Wales for treatment. The ores consisted chiefly of Copper Glance, with small amounts of Azurite, Malachite and Cuprite"--page 2.

Illustrations Of The Treatment Of Nickeliferous Ores At Mine La Motte, Madison County, Missouri, William C. Minger

Professional Degree Theses

"The Mine la Motte property consists of a tract of about 24000 acres situated in the counties of Madison and St. Francois, principally in the former, however. It has been worked since the year 1720, and besides its historical interest is certainly one of the most important mines in the state, as regards both the capitalist and scientist. These facts warrant a detailed description of the mines, and the methods of working which are in vogue there, these being necessary to any one who would realize their magnitude and importance. The property is situated about 100 miles southeast of St. …

Dissertation On Stricture Of The Male Urethra, Jonathan Knight Bacon

Yale Medicine Thesis Digital Library

No abstract provided.

Dissertation On Chronic Dysentery Of The United States Army, William Lockwood Bradley

Yale Medicine Thesis Digital Library

No abstract provided.

Dissertation On Rheumatic Fever, William Henry Hine

Yale Medicine Thesis Digital Library

No abstract provided.

Dissertation On Scarlatina, Frank Gallagher

Yale Medicine Thesis Digital Library

No abstract provided.

Rheumatism, Durrell Shepard

Yale Medicine Thesis Digital Library

No abstract provided.

Dissertation On Puerperal Fever, George Washington Beach

Yale Medicine Thesis Digital Library

No abstract provided.