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Articles 172651 - 172680 of 172794

Full-Text Articles in Engineering

Description Of El Paso Consolidated Gold Mine, Edwin Thompson Perkins Jan 1902

Description Of El Paso Consolidated Gold Mine, Edwin Thompson Perkins

Professional Degree Theses

No abstract provided.


Copper Bismuth Alloys, Samuel Marshall Greenidge Jan 1902

Copper Bismuth Alloys, Samuel Marshall Greenidge

Bachelors Theses

No abstract provided.


Report On The Reed, Stimson And Kelley Copper And Iron Banks Of Phelps County, Mo., Albert Hill Fay, Carlos E. Martinez Jan 1902

Report On The Reed, Stimson And Kelley Copper And Iron Banks Of Phelps County, Mo., Albert Hill Fay, Carlos E. Martinez

Bachelors Theses

"PRELIMINARY STATEMENT with reference to the formation of limonite and hematite, the principal iron ores of the Ozark District. Iron and copper in solution as sulphides, coming in contact with lime or magnesium carbonates, will be precipitated as pyrite or marcasite and chalcopyrite. Hence the origin of this class or ores. These will in time oxidize to magnetite or hematite, and these in turn will form limonite, and the copper sulphide, or chalcopyrite, is oxidized to the carbonates, malachite and azurite"--page 1.


Aluminum As A Commercial Conductor Of Electric Energy, George Edwin Lyman, Edward J. Morris Jan 1902

Aluminum As A Commercial Conductor Of Electric Energy, George Edwin Lyman, Edward J. Morris

Bachelors Theses

"In considering the adaptability of any metal to serve as a distributing agent of electrical energy, the investigation must shape itself along three lines, viz, - the electrical, the physical and the chemical properties which the metal may possess. Evidently a deficiency in any of these properties, if serious, will debar it from successfully coping in the market with its competitors. A metal may have excellent conductivity and its behavior electrically may be thoroughly satisfactory, but if it lacks strength, physically, or ability to resist the destructive forces of the atmosphere, chemically, it is obviously inadaquate sic to serve as …


Railroad Location, George P. Woodhall Jan 1901

Railroad Location, George P. Woodhall

Bachelors Theses

No abstract provided.


Heat Of Formation Of Slags, George P. Woodhall, Walter Adams Luther Jan 1901

Heat Of Formation Of Slags, George P. Woodhall, Walter Adams Luther

Bachelors Theses

"First it was intended to find out the number of heat units per gram of slag that each individual slag would require. The color and blending of the slag were also to be noted. Causes and any derivations that may appear. If any fixed law was visible it was thought to bring it forth. The percentage of iron oxide and calcium oxide was to be varied and the silicon to bear the same proportion in every case"--Object of Thesis, page 1.


The Sinking Of Piers On Red River Bridge On Kansas City Southern Ry., Albert Spengler Jan 1901

The Sinking Of Piers On Red River Bridge On Kansas City Southern Ry., Albert Spengler

Bachelors Theses

"In September, 1899, began the work on the construction of the substructure for the Red River Bridge for the Kansas City Southern Railway at Index, Texas, ten miles north of Texarkana, Texas. The new substructure was located about one hundred feet up stream from the old one, consequently it was not necessary to maintain traffic during construction. The object of the new bridge was to replace a much lighter one, which was too light for the increased weight of rolling stock of the railroad company. The substructure consists of seven piers, including a pivot pier, and two abutments. The seven …


Prospecting In Western Mexico, Theodore S. Delay Jan 1901

Prospecting In Western Mexico, Theodore S. Delay

Professional Degree Theses

"This article is dedicated and addressed to any man who contemplates a prospecting expedition in Mexico. I have made no attempt at a display of literary elegance, or scientific erudition. My aim has been to point out and explain such of the conditions of the business as are peculiar to Mexico. If any one, after having perused these pages, should find himself thereby the better able to cope with the difficulties of such an expedition, a rather unprofitable experience of the writer will have been not wholly fruitless"--page 31.


Report On The Onyx Deposits Of Boiling Springs Cave, Ignatius J. Stauber, Fred R. Koeberlin Jan 1901

Report On The Onyx Deposits Of Boiling Springs Cave, Ignatius J. Stauber, Fred R. Koeberlin

Bachelors Theses

No abstract provided.


The Utilization Of The Gasconade River For Power Purposes, Charles A. Fach, Walbridge H. Powell Jan 1901

The Utilization Of The Gasconade River For Power Purposes, Charles A. Fach, Walbridge H. Powell

Bachelors Theses

No abstract provided.


The Determination Of The Fusing Point Of A Few Igneous And Metamorphic Rocks, Fred H. Perkins Jan 1900

The Determination Of The Fusing Point Of A Few Igneous And Metamorphic Rocks, Fred H. Perkins

Bachelors Theses

"There are two methods of arriving at the refractoriness of a rock. One is the physical, the other is the chemical. The physical methods attempt to determine it directly by subjecting it to heat, and the temperature obtained is registered by use of numerous methods, a type of each kind I will describe in this paper. The chemical methods attempt to arrive at the result by calculations based upon a chemical analysis, though one or more physical determinations have to be made as a basis for these calculations. As the former method is direct, my operations are based upon this …


Thesis For Degree Of Bachelor Of Science In Mining Engineering [A Fire Clay Of Missouri], Howard Joshua Taylor Jan 1900

Thesis For Degree Of Bachelor Of Science In Mining Engineering [A Fire Clay Of Missouri], Howard Joshua Taylor

Bachelors Theses

"The clay examined is a fire clay of Missouri, varying in color from white, in pure specimens, to yellow or brown when stained with iron. It is opaque with a luster, varying from dull to pearly, an argillaceous odor and unctous feel"--page 1.


The Diente Mining District, Abraham L. Fernandez Jan 1900

The Diente Mining District, Abraham L. Fernandez

Professional Degree Theses

"Like every other camp whose ores are inaccessible to market at a profitable cost, the Diente Mining district has remained hardly developed until the advent of the smelters at Monterey. Since then large sums of money have been invested in the proper installation of machinery for the extraction and transportation of its product, and the deposits have been and are being worked systematically and on a large scale"--page 1.


A Comparison Of The Fire And Wet Methods For Lead, George Walter Dean Jan 1900

A Comparison Of The Fire And Wet Methods For Lead, George Walter Dean

Professional Degree Theses

No abstract provided.


Notes Relative To The Ores Occurring At Mercur, Utah Together With A General Description Of The Metallurgical Practices Applied To Them At Delamar's Mercur Mines, Daniel Cowan Jackling Jan 1900

Notes Relative To The Ores Occurring At Mercur, Utah Together With A General Description Of The Metallurgical Practices Applied To Them At Delamar's Mercur Mines, Daniel Cowan Jackling

Professional Degree Theses

"The most notable increase in the gold production of Utah is due to the extensive operations of DeLaMar's Mercur mines in the Mercur district, which are at the present time producing more than two-thirds of the total tonnage of the entire camp. The nucleus of this great property consist of 143 acres, called the Golden Gate Group, by which name the property is still locally known, was purchased by Captain J. R. DeLaMar in 1895"--page 1.


Efficiency Of The Electric Lighting Plant Of The Rhode Island College Of Agriculture And Mechanic Arts, John Joseph Fry Jan 1900

Efficiency Of The Electric Lighting Plant Of The Rhode Island College Of Agriculture And Mechanic Arts, John Joseph Fry

Student and Lippitt Prize essays

A study of the functionality of the electric system at Rhode Island College (University of Rhode Island).


Evolution Of The Dynamo, Ralph Nelson Soule Jan 1900

Evolution Of The Dynamo, Ralph Nelson Soule

Student and Lippitt Prize essays

This essay supplies an extensive history of electricity beginning in 600 BC to 1900, chronicling the evolution of the dynamo and its uses.


Bromination Of Gold Ore, Francis Joseph Tayman, Santiago Chamberlain Jan 1900

Bromination Of Gold Ore, Francis Joseph Tayman, Santiago Chamberlain

Bachelors Theses

"The bromination of gold ore, in which the gold is extracted by means of Bromine in water, under local conditions"--page 1.


The Extraction Of Gold And Silver From Ore By The Cyanide Process, Isaac Peter Frazier, Claude Egan Jamison Jan 1900

The Extraction Of Gold And Silver From Ore By The Cyanide Process, Isaac Peter Frazier, Claude Egan Jamison

Bachelors Theses

"The object of our investigation was to determine whether the ore could be treated by the Cyanide Process, and to find the conditions for maximum extraction. The following points were investigated:- 1. Best size for maximum extraction. 2. Best strength of solution. 3. Minimum length of time for maximum extraction. 4. Minimum amount of cyanide solution required"--page ii.


Geological Conditions And Genesis Of The Ore Deposits Of The Rush Creek District, Marion County, Arkansas, William Melvin Weigel Jan 1900

Geological Conditions And Genesis Of The Ore Deposits Of The Rush Creek District, Marion County, Arkansas, William Melvin Weigel

Bachelors Theses

No abstract provided.


The Mining & Construction Of A Smelter For The Production Of Zinc-White From Western Lead-Zinc Ores, Hector George Sylvester Anderson, V. B. Hinsch Jan 1900

The Mining & Construction Of A Smelter For The Production Of Zinc-White From Western Lead-Zinc Ores, Hector George Sylvester Anderson, V. B. Hinsch

Bachelors Theses

"On account of the high price of the old Dutch process of making white lead and the undesirability of sublimed white-lead as the bulk of the pigment, the use of zinc-white as an adulterant of the lead-white made by the old Dutch process is new extensively used by all paint manufacturers. The advantages of its use in conjunction with white-lead in the manufacture of white paints is the fact that it does not combine with sulphur as does white-lead itself. The specifications of the U. S. Light-house Dept. require 75% of zinc-oxide and 25% of white lead as a mixture. …


Action Of Caustic Hydroxides Upon Aluminum, Herbert Fordyce. Rogers Jan 1899

Action Of Caustic Hydroxides Upon Aluminum, Herbert Fordyce. Rogers

Bachelors Theses

No abstract provided.


Electrolysis Of Water In A Copper Sulphate Solution, Hermann Otto Schulze Jan 1899

Electrolysis Of Water In A Copper Sulphate Solution, Hermann Otto Schulze

Bachelors Theses

No abstract provided.


Pennsylvania Coal Fields, Arthur D. Terrell Jan 1899

Pennsylvania Coal Fields, Arthur D. Terrell

Bachelors Theses

"The use of mineral coal dates back before the Christian Era.

The mining of coal, however, is much more recent.

About the 18th century coal mining began to be scientifically executed.

The area of Anthracite coal fields in Penn. is not quite 500 square miles included in outcrop lines of its lowest beds"--page 1.


Gold Chlorination, Edwin Thompson Perkins Jan 1899

Gold Chlorination, Edwin Thompson Perkins

Bachelors Theses

"In a process of gold chlorination recently introduced and apparently used with success in Southern Australia, potassium permanganate, common salt and sulphuric acid were used as the generators of the chlorine. A series of experiments was made to determine the efficisacy of these reagents and for developing chlorine as compared with other methods in use"--page 1.


Design Of A Three Hinged Arch Steel Bridge, Hermann Otto Schulze Jan 1899

Design Of A Three Hinged Arch Steel Bridge, Hermann Otto Schulze

Bachelors Theses

No abstract provided.


Influence Of Time And Temperature In The Roasting Of Sulphides, Roger Hanson Hatchett Jan 1899

Influence Of Time And Temperature In The Roasting Of Sulphides, Roger Hanson Hatchett

Bachelors Theses

"The original object of this work was to determine the relation between the quantities of oxide and sulphate formed in roasting a sulphide under known conditions of temperature, time and supply of air. But difficulties arose in constructing apparatus, which in the short time allotted could not be overcome. These are mentioned in description of apparatus, and were of such a nature that the relations between products and conditions are for the most part qualitative"--page 1.


Some Quantitative Experiments On The Electro-Deposition Of Copper, Jerrold Roscoe Underwood Jan 1899

Some Quantitative Experiments On The Electro-Deposition Of Copper, Jerrold Roscoe Underwood

Bachelors Theses

"The object of these experiments was to determine in a quantitative way the effect or effects, if any, of these various metals on the purity of the copper precipitated electrolytically. The material worked with was from a copper anode from ( ) carrying a silver, a trace of gold, arsenic and antimony as well as other metalic sic impurities"--Object, page 1.


Cement Testing, Arthur D. Terrell Jan 1899

Cement Testing, Arthur D. Terrell

Bachelors Theses

"For a Thesis in 1898 I did some work on cement testing with very satisfactory results, but I did but little more than get a few ideas as to how to conduct the experiments to best advantage. For the present year I have taken up the work for further investigation"--page 1.


The Strength Of Cement Under Different Conditions, Francis Joseph Tayman Jan 1899

The Strength Of Cement Under Different Conditions, Francis Joseph Tayman

Bachelors Theses

"Derivation of some Empirical Formulae, showing relation between breaking strength, and various functions which enter into Cement testing. We find a great deal of experimental work done in Cement testing, also some curves plotted, but there are but few equations fitted to these curves, this, then, is the object of the present work. In this work a great many interesting points have been made manifest, most of them are of no practical value but merely of interest in themselves. The work has been on several of the most important ones, to be given subsequently. On these and a few others …