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Articles 76951 - 76980 of 77176

Full-Text Articles in Engineering

Some Geology On The Weingarten Quadrangle, Missouri, John Whittlesey Bodman Jan 1910

Some Geology On The Weingarten Quadrangle, Missouri, John Whittlesey Bodman

Bachelors Theses

"The work in this report covers about 90 square miles situated in the east and middle portion of Ste. Genevieve County, Missouri, between townships 35-37 north and ranges 7-9 east. It is termed the Weingarten Quadrangle by the State Geological Survey...The body of the thesis is detailed areal mapping. All formations and structural features are put on a topographic map with a scale of 1/62,500, contour interval 20 ft., datum mean sea level"--page 1.

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A Study Of Some Assay Problems, Walter Dobbins, Charles Weaver Traughber Jan 1910

A Study Of Some Assay Problems, Walter Dobbins, Charles Weaver Traughber

Bachelors Theses

"The object of this thesis is to work out some assay problems. Each problem is taken up independently, and may be considered as having no connection whatever with the others"--Introduction, page ii.

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The Losses Of Gold During Cupellation Using Various Makes Of Cupels, Benjamin Harrison Dosenbach Jan 1910

The Losses Of Gold During Cupellation Using Various Makes Of Cupels, Benjamin Harrison Dosenbach

Bachelors Theses

"There are on the market various cupels. Many of the assay-supply firms sell a "manufactured" cupel, presumably made of bone-ash. The great majority of all cupels used, are made of bone-ash in the assay office itself. The object of this work is to compare the losses of gold when the various patented, the various manufactured and the ordinary hand made cupels are used"--page 1.

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A Study Of The Efficiency Of Discharge Of Classifier Spigots, Harmon Edwin Minor, James Bunten Jan 1910

A Study Of The Efficiency Of Discharge Of Classifier Spigots, Harmon Edwin Minor, James Bunten

Bachelors Theses

"A knowledge of the amounts of water and sand that will be discharged by classifier spigots under various conditions is of considerable importance in the design of classifiers. Suppose it is desired to discharge fifty tons of sand with an average diameter of 2 m.m. through a spigot orifice, the sand being mixed with 100 tons of water and the entire amount of the mixture being discharged in ten hours from the spigot, which is submerged to a depth of two feet under the water. How large a spigot is required? Problems such as this are by no means uncommon. …

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Notes On The Precipitation Of Gold From Cyanide Solution, Charles Adrian Burdick, Harry Wade Connelly Jan 1910

Notes On The Precipitation Of Gold From Cyanide Solution, Charles Adrian Burdick, Harry Wade Connelly

Bachelors Theses

"This work was to determine the Potassium Cyanide and the Zinc consumed in the precipitation of Gold from cyanide solutions by zinc dust"--page 1.

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Friction In Small Air Pipes, Albert Park, Howard Kelsey Peterson Jan 1910

Friction In Small Air Pipes, Albert Park, Howard Kelsey Peterson

Bachelors Theses

"In the course in Compressed Air at the Missouri School of Mines our attention was called to the fact that no reliable data could be found relating to friction losses in pipes under three inches in diameter carrying compressed air. Therefore the undersigned decided to undertake as a thesis the securing of the needed data and herein are recorded the results of our work"--page 1.

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The Concentration Of A Pyrolusite Ore, Frank O. Blake, Van Hoose Smith Jan 1910

The Concentration Of A Pyrolusite Ore, Frank O. Blake, Van Hoose Smith

Bachelors Theses

"This is the history of an attempt to produce from a pyrolusite ore, a material sufficiently rich in manganese to be of value in the various industries such as the making of speigeleisen and ferro-manganese, the glass manufacturing, and the chemical industries. The greater part of the manganese used in the United States comes from Brazil, India and Russia. Our American ores are, in general, low grade and requires various preliminary concentration to fit them for use. Although we possess in this country a great deal of manganese ore, which could be put into suitable condition for the market, there …

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The Determination Of Friction-Coefficients Of Water In Small Iron Pipes, O. W. Holmes, Ernest Wander Jan 1910

The Determination Of Friction-Coefficients Of Water In Small Iron Pipes, O. W. Holmes, Ernest Wander

Bachelors Theses

"This thesis was undertaken to determine accurately the coefficients of friction of water, flowing at varying velocities in small iron pipes and elbows. It was the intention to obtain the condition of pipes and elbows similar to that met with in general practice"--Introduction, page 1.

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The Preparation Of Zinc Blende For Reduction, Frederick Edward Riede, Earl Frederick Boland Jan 1910

The Preparation Of Zinc Blende For Reduction, Frederick Edward Riede, Earl Frederick Boland

Bachelors Theses

"The object of this thesis was, in the beginning, to investigate the losses which occur throughout the process of extracting zinc from its ore. Owing to the length of time required in roasting and to the short period of time to do the work, we were compelled to limit ourselves to the roasting of zinc blende or the preparation of zinc blende for reduction"--page 3.

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Modern Cyanide Practice, Harvey Edson Smith Jan 1910

Modern Cyanide Practice, Harvey Edson Smith

Bachelors Theses

"It is noticable sic that about all of the recent improvements in cyanide practise sic have been along mechanical rather than chemical lines. the use of oxidizers such as air, ozone, sodium peroxide, etc., the use of the salts of lead, and even the addition of a coating of lead to the zinc shavings in the extractor boxes were all recommended when the process was first advocated but sometimes for different reasons. In the early days of the process the addition of hypochlorites, alkaline persulphates, and the use of mercuric cyanide was also investigated but has not proven satisfactory owing …

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The Design Of A Mill To Treat A Certain Gold-Silver Ore By Cyanidation, Emilio Diaz, Robert William Mackey Jan 1910

The Design Of A Mill To Treat A Certain Gold-Silver Ore By Cyanidation, Emilio Diaz, Robert William Mackey

Bachelors Theses

"The problem under consideration is the design of a hundred-ton mill for treating silver ores by cyanidation... The Sulphur is partly combined as Sulphide and partly as the Iron Sulphates, FeSO₄ and Fe₂(SO₄)₃. To determine the best method of procedure, preliminary tests were run on lots of 100 pounds each, this being crushed in a sampling grinder and classified into sand a slime"--Introduction, page 1.

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Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg Jan 1910

Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg

Bachelors Theses

No abstract provided.

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Ore Dressing Laboratory For The Missouri School Of Mines And Metallurgy, Rolla, Missouri: Design, Description, Drawings For Erection, Bills Of Material, And Specifications, Boyd Dudley Jr. Jan 1910

Ore Dressing Laboratory For The Missouri School Of Mines And Metallurgy, Rolla, Missouri: Design, Description, Drawings For Erection, Bills Of Material, And Specifications, Boyd Dudley Jr.

Masters Theses

"The work of preparing suitable drawings and specifications for the construction of the new Ore Dressing Laboratory of the Missouri School of Mines and Metallurgy was begun about August 15, 1909. At that time general plans, as shown in drawings No. 1 and No. 2, were drawn up and submitted for approvaleaf With certain minor alterations, to be mentioned under the section on specifications, these plans will be followed in the installation of machinery. Other detail drawings were made by the class in Ore Dressing Problems under the direction of the writer during the school term ending March 12, 1910. …

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Design Of 300 Ton Cyanide Tailings Plant And Operation Of Same, Lamar Horacio Hunt Jan 1910

Design Of 300 Ton Cyanide Tailings Plant And Operation Of Same, Lamar Horacio Hunt

Masters Theses

"The plant in question was designed by the writer, to treat the immense tailings dumps of the Sacramento Gold Mining company at Mercur, Utah, consisting of one-half million tons of old cyanide tailings. The ore is porous and friable, causing much slime, which is impermeable to cyanide solution, by the old leaching system. Slime has always been troublesome, and the above plant was designed to overcome this difficulty"--page [1].

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A Method Of Obtaining Lead Concentrates From The Slimes Of The St. Joseph Lead Mill, Lewis Alfred Delano Jan 1909

A Method Of Obtaining Lead Concentrates From The Slimes Of The St. Joseph Lead Mill, Lewis Alfred Delano

Professional Degree Theses

"In the concentrating of lead ores, the water used in the mills carries the tailings from the jigs and tables to chatt tanks. Here the chatts and sands settle while the greater part of the water overflows and enters a sluice or slimes branch to the settling ponds. This overflow water carries with it a great deal of float lead. It is impossible to catch this lead in the mill on moving machinery without using too much power and mill space to effect a profitable saving. Ninety percent of this float will pass through a 140 mesh sieve. there will …

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Economic Investigation Of The Lignites Of The Dickinson, N.D. Area, Glenn Beckley Morgan Jan 1909

Economic Investigation Of The Lignites Of The Dickinson, N.D. Area, Glenn Beckley Morgan

Professional Degree Theses

No abstract provided.

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The Relation Of The Composition Of A Mineral To Its Properties, Edwin Phelps Murray Jan 1909

The Relation Of The Composition Of A Mineral To Its Properties, Edwin Phelps Murray

Professional Degree Theses

"The attempt has been made to bring together and to classify the properties of minerals and to show that there is some simple qualitative relation between their composition and physical properties, or in other words, to show that minerals containing different percentages of a certain element will all have similar properties dependent upon the proportion of that element. Further investigation of this subject would be in determining the modifying influence of crystal form"--page 1.

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Design And Details Of Elevated Steel Tank, William A. Baueris Jan 1909

Design And Details Of Elevated Steel Tank, William A. Baueris

Bachelors Theses

"An effort has been made in this work to furnish complete plans and specifications for a steel structure which could replace the concrete reservoir on natural elevation north of Rolla, attention being given to capacity and relative elevations. A comparison of these two structures regarding relative advantages and disadvantages is herein given, with the intention of providing some foundation as a source of choice between these two classes of structures"--page 2.

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The Design Of A Dam And The Investigation Of A Water Supply For The City Of Rolla, Missouri, Frank Xavier Nachtman, Ernst Lorenze Chamberlain Jan 1909

The Design Of A Dam And The Investigation Of A Water Supply For The City Of Rolla, Missouri, Frank Xavier Nachtman, Ernst Lorenze Chamberlain

Bachelors Theses

"The object of this paper is to investigate a means of supplying the City of Rolla with better water at a reasonable a price as possible. The elevation and distance of the supply from the city were very important factors,also the most economical position for the dam was to be considered. After examining several drainage basins with the above purposes in mind we selected one just west of the City on account of its convenience and high elevation. The watershed includes an area of ever eight hundred acres and is divided into two parts which come together in a narrow …

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The Construction Of The United States Macadam Road At Fort Scott, Kansas, William Mcelroy Jan 1909

The Construction Of The United States Macadam Road At Fort Scott, Kansas, William Mcelroy

Bachelors Theses

No abstract provided.

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Design Of Reinforced Concrete Water Tower And Tank, Harvey Oden Garst, Pearl Frederick Michael Jan 1909

Design Of Reinforced Concrete Water Tower And Tank, Harvey Oden Garst, Pearl Frederick Michael

Bachelors Theses

"Theoretically the most economical dimension for a flat bottomed cylindrical tank would be such that the height of the tank is equal to the diameter, but such a tank does not look as well as one which has the height a little greater than the diameter and as the cost will be affected but little by making the height a few feet greater than the diameter, the most economical design will not be strictly carried out in this particular"--Data, page 1.

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The Cyanidation Of High Grade Gold And Silver Concentrate, Reginald Henry Brinton Butler, John Warren Beard Jan 1909

The Cyanidation Of High Grade Gold And Silver Concentrate, Reginald Henry Brinton Butler, John Warren Beard

Bachelors Theses

"The cyanidation of high grade gold and silver concentrate is a subject that has lately been attracting the attention of metallurgists in different parts of the world, and offers an interesting field for investigation and research. The inducements are especially strong in districts at log distances from the smelter, and where high freight rates and excessive treatment charges obtain"--page 1.

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A Study Of The Settlement Of Slimes, William Simpson Hall, James Crawford Compton Jan 1909

A Study Of The Settlement Of Slimes, William Simpson Hall, James Crawford Compton

Bachelors Theses

"The purpose of this thesis, as originally planned, was to determine the effect produced by certain substances called electrolytes upon the mill product known as "slimes". The subject presented an ever increasing number of new problems as it progressed and some work along the line of several of these branches is embodied in the following pages. Reports of investigation and behavior of slimes when treated for quick settlement are few and unsatisfactory. Our results may prove nothing already unknown, but the fact that so little data is easily accesible sic has been the motive for this thesis"--Preface, page 1.

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Timbering In The Warren District, Cochise Co., Arizona, Fred Tete Boyer Jan 1909

Timbering In The Warren District, Cochise Co., Arizona, Fred Tete Boyer

Bachelors Theses

No abstract provided.

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Geology Along The St. Louis And San Francisco Railroad From Rolla To Newburg, Victor H. Hughes Jan 1909

Geology Along The St. Louis And San Francisco Railroad From Rolla To Newburg, Victor H. Hughes

Bachelors Theses

"The area, the geology of which, constitutes the subject of this Thesis, lies between the towns of Rolla and Newburgh sic , in Phelps Co., Missouri, and is contiguous to the St. Louis & San Francisco Railroad for its entire distance"--Text of Thesis, page 1.

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Radiation Losses In Metallurgical Furnaces, Frank Richard Loveridge Jan 1909

Radiation Losses In Metallurgical Furnaces, Frank Richard Loveridge

Bachelors Theses

"The conduction and radiation of heat are of great importance in metallurgy. Metallurgical operations require, in the great majority of cases, temperatures above those of normal atmospheric conditions. Loss of heat is loss of dollars. Furnaces of all kinds allow to pass their walls a greater or less amount of heat, i.e. heat is lost by conduction and by radiation. This heat is often spoken of as radiation loss. It is due to the heat being conducted from the inside to the outside of the furnace. The materials of construction, and manner of building the furnace has much to do …

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A Comparison Of The Solvents Used In The Hydrometallurgy Of Silver, Simon Jochamowitz, Enrique Cavazos Jan 1909

A Comparison Of The Solvents Used In The Hydrometallurgy Of Silver, Simon Jochamowitz, Enrique Cavazos

Bachelors Theses

"Potassium cyanide solutions, hyposulphite of soda solutions, and a mixture called the Russell solution, are the solvents most used to win silver from its ores. We are not the first to attempt comparisons of the solvent powers of the different solutions named. It is difficult, at least we have found it difficult, to find tabulated, a comparison of the various solvents from the points of view of speed of action, of consumption of reagents, of suitability of one or another to a given type of ore"--page 1.

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The Volatilization And Absorption Of Silver Chloride, Edgar Joseph Wolf, Victoriano Elicano Jan 1909

The Volatilization And Absorption Of Silver Chloride, Edgar Joseph Wolf, Victoriano Elicano

Bachelors Theses

"The purpose of this thesis was to study the relation of the loss of silver chloride to such variables as the temperature, as the type of gangue, as the method of carrying on the roast; to determine what becomes of the silver lost and to attempt to recover it. In our work we consider something seemingly overlooked by many, if not all of the workers; namely, that there is a great loss of silver chloride due to absorption, as well as to volatilization. Volatilization has been the hobby of most of the experimeters. We hope to show as a part …

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A Study Of The Losses Of Gold During Cupellation In The Presence Of Tellurium, George Albert Easley, Carl Winthrop Keniston Jan 1909

A Study Of The Losses Of Gold During Cupellation In The Presence Of Tellurium, George Albert Easley, Carl Winthrop Keniston

Bachelors Theses

"It is generally accepted that the presence, in the lead button, of a small amount of tellurium causes, during cupellation, a loss of gold. Little, however, is known as to the loss, when tellurium is present, due to variation in the temperature of cupellation...Our work was carried on with the intention of determining the loss of gold, due to temperature in the presence of known amount of tellurium and to compare this loss with that caused by the temperature alone. Has temperature the same, a greater, or a less effect on the loss of gold during cupellation when tellurium is …

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The Microstructure Of Drill Steel, Arthur L. Pollard Jan 1909

The Microstructure Of Drill Steel, Arthur L. Pollard

Bachelors Theses

"The object of this thesis was to determine the microstructure of the various grades of steel used in rock drilling and to obtain if possible some general relation between the structure, composition, and hardening temperature. About 35 of the best known grades of tool steel having a carbon content of about 1 per cent or containing an equivalent hardening agent"--page 2.

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