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Articles 195631 - 195660 of 195987

Full-Text Articles in Engineering

Determination Of Critical Point Of Concentrating Tables On Flat River Ore, J. C. Finagin Jr., W. C. Hogoboom Jan 1914

Determination Of Critical Point Of Concentrating Tables On Flat River Ore, J. C. Finagin Jr., W. C. Hogoboom

Bachelors Theses

"In concentrating any ore on tables there is, theoretically, a critical point in sizing, beyond which it can not be expected to recover the valuable minerals; that is, valuable mineral finer than a certain size will go with the gangue and be lost. for instance, in the diagram of the Wilfley Table shown, the concentrates grade from coarse to fine as indicated, but instead of grading on down into very fine sizes farther up the table these finer sizes are found mixed with the middlings, tailings and slimes as indicated by the arrows. The problem is to determine the critical …

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An Investigation Of The Leaching Of Copper Tailings By Means Of Potassium Cyanide, Precipitation Of The Dissolved Copper By Means Of Aluminum, With Consequent Regeneration Of The Cyanide Consumed, Thaddeus Reamy Goldsborough Jan 1914

An Investigation Of The Leaching Of Copper Tailings By Means Of Potassium Cyanide, Precipitation Of The Dissolved Copper By Means Of Aluminum, With Consequent Regeneration Of The Cyanide Consumed, Thaddeus Reamy Goldsborough

Bachelors Theses

"One of the principal disadvantages attending the use of most of the usual solvents for Copper, such as Sulphuric Acid, Ferrous Chloride, etc., in the treatment of tailings products, is that the solvent is not regenerated upon precipitation by iron, and in fact is destroyed by the precipitant. This of course involves a dead loss of a definite portion of acid or other reagent, proportional to the amount of Copper dissolved. A solvent which would be regenerated upon precipitation is eminently desirable. At the same time, a carbonate gangue, or one of such a nature which will react with the …

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The Efficiency Of The Kerruish Smoke Consumer And Coal Economizer, Arthur F. Truex, Gilbert F. Metz Jan 1914

The Efficiency Of The Kerruish Smoke Consumer And Coal Economizer, Arthur F. Truex, Gilbert F. Metz

Bachelors Theses

"The Kerruish Smoke consumer is the invention of Mr. H. B. Kerruish and is patented in the United States under the Patent Number 1,046,196. The tests herein shown were made for the purpose of determining the practical value of the device as a smoke consumer, and as a fuel economizer. Many forms of these devices have been put on the market, some using a steam spray, and others using air in a manner similar to the Kerruish apparatus"--Scope of the Thesis, page 2.

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The Extraction Of Copper From Its Orea By Dilute Chemicals, Robert C. Dabney Jan 1914

The Extraction Of Copper From Its Orea By Dilute Chemicals, Robert C. Dabney

Archived Theses and Dissertations

No abstract provided.

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Design Of Steel Skeleton For A Fourteen Story Building, Thorhallur Hermann Jun 1913

Design Of Steel Skeleton For A Fourteen Story Building, Thorhallur Hermann

Undergraduate Theses and Senior Projects

No abstract provided.

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A Thesis Presented To The President And Faculty Of Marquette University For The Degree Of Bachelor Of Science In Civil Engineering, Edmund C. Albrecht Jun 1913

A Thesis Presented To The President And Faculty Of Marquette University For The Degree Of Bachelor Of Science In Civil Engineering, Edmund C. Albrecht

Bachelors’ Theses

It will be assumed that the outside dimensions of the site upon which the building is to be erected are one hundred by one hundred and seventy feet. As noted before, the building is to be nineteen stories plus an attic and basement, in height, or approximately two hundred and fifty-five feet from the curb to the top of the cornice. The entire building is to be of white tile with a brick backing. There will be two entrances from the main street and one from the side street.

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A Test To Determine The Operating Efficiency Of A Steam Driven Electric Power Plant, Walter H. Rosemeyer, Edward Walter Kane Jun 1913

A Test To Determine The Operating Efficiency Of A Steam Driven Electric Power Plant, Walter H. Rosemeyer, Edward Walter Kane

Bachelors’ Theses

In this test it was desired to determine the amount of water evaporated per pound of coal, and the pounds of steam consumed by main engine per kilowatt-hour output. Because of the existing conditions the test was run on only one boiler but on account of the similiarity of construction the results on the other boilers were assumed to be practically the same. The coal used was Hocking Valley Screenings, abituminous coal, which, from tests conducted by the engineer to determine the fuel best suited to the conditions of the plant, was found to give the most economical results. Since …

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A Commercial Efficiency Test Of A Power Plant Located At Marquette University, Edward James Dunphy, James Edward Zimmermann Jun 1913

A Commercial Efficiency Test Of A Power Plant Located At Marquette University, Edward James Dunphy, James Edward Zimmermann

Bachelors’ Theses

The purpose of the test was to determine the coat of generating one kilowatt-hour of electrical energy under existing conditions of operation. The plant under test is located at the Marquette University Power House and consists of a Filer Stowell Company simple, horizontal, now-condensing Corliss steam engine, with an Allis Chalmers Company direct current generator belt­ connected, and one Fairbanks, Morse & Company horizontal return tubular boiler. The coal used during the test was Pocahontas screenings, costing three and twenty-five cents per ton of 2000 pounds, delivered in the boiler-room.

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Relation Of Carbon Dioxide In Flue Gases To The Efficiency Of A Boiler, Richard A. Wagstaff, Philip A. Moore, William Ehlers, James Hopkins Jan 1913

Relation Of Carbon Dioxide In Flue Gases To The Efficiency Of A Boiler, Richard A. Wagstaff, Philip A. Moore, William Ehlers, James Hopkins

Bachelors Theses

"This thesis was undertaken to demonstrate the practical utility of measuring the efficiency of a Heine Boiler, installed in the Power Plant at the Missouri School of Mines, by the amount of CO₂ in the flue gases. The tests were made on a new boiler which had recently been installed in the Power Plant. The boiler and setting being new, the tests should show a high percentage of CO₂ in the flue gases and a high evaporative efficiency by the boiler"--page 3.

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Methods Of Mining And The Preparation Of Coal In The Belleville, Illinois District, Harry William Shaw Jan 1913

Methods Of Mining And The Preparation Of Coal In The Belleville, Illinois District, Harry William Shaw

Bachelors Theses

"The methods of mining and the preparation of coal for the market in the Belleville District represent the most modern and up-to-date methods in the state of Illinois. Mine No. 17 of the Consolidated Coal Company is the largest in the district and the methods used here are typical of the entire district"--page 6.

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The Effect Of Insoluble Sulphates On The Volumetric Determination Of Lead, Mervin Joe Kelly, Ralph Knappenberger Jan 1913

The Effect Of Insoluble Sulphates On The Volumetric Determination Of Lead, Mervin Joe Kelly, Ralph Knappenberger

Bachelors Theses

"It has been pointed out that Alexander's Molybdate Method for lead gives inconsistently varying results when calcium is present in the ore...It was to clear up this apparent contradiction and to find the true effect of the presence of calcium on the titration in the molybdate method, that this investigation was started"--Introduction, page 1.

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Test Of The Municipal Power Plant Of The City Of Rolla, Missouri, Dexter Eli Andrus, Leonard Stephen Copelin, Harry Hackett Nowlan Jan 1913

Test Of The Municipal Power Plant Of The City Of Rolla, Missouri, Dexter Eli Andrus, Leonard Stephen Copelin, Harry Hackett Nowlan

Bachelors Theses

"The object of the test was to determine the efficiency of the boilers and engines under the actual conditions of every day operation"--Object of the Test, page 3.

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A Series Of Tests On The Condensation Of Zinc Vapor To Metallic Zinc, Frank W. Cody, John W. Greene Jan 1913

A Series Of Tests On The Condensation Of Zinc Vapor To Metallic Zinc, Frank W. Cody, John W. Greene

Bachelors Theses

"The purpose of this Thesis is to try to show the effect which certain variables, which are always present in practice, have upon the condensation of Zinc Vapors to Metallic Zinc. That these variables can and do play an important part in the Zinc Smelting Industry can be shown from the fact that all of the zinc obtained at the present time is won from ores by reducing the oxide of zinc to metallic zinc by means of carbon. This operation necessarily takes place at a temperature above the boiling point of zinc. This means that the zinc immediately on …

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Flotation Applied To Joplin Sludge, Thaddeus C. Wilson, Gustaf Axel Hellstrand Jan 1913

Flotation Applied To Joplin Sludge, Thaddeus C. Wilson, Gustaf Axel Hellstrand

Bachelors Theses

"The sludge (fine material) which daily is being sent to the tailing dump by the Joplin mills contains values in lead and zinc often in excess, as to percentage, of that of the crude ore. At present no attempt is being made to treat this It is at this point that it is proposed to introduce some flotation process to supplement the ordinary scheme of wet concentration. With this end in view we have conducted a series of experiments in the flotation of a Joplin sludge"--page 2-3.

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The Effect Of The Presence Of Certain Base Metals On The Ability Of Amalgams To Catch Gold And Silver, Ray Gould Knickerbocker Jan 1913

The Effect Of The Presence Of Certain Base Metals On The Ability Of Amalgams To Catch Gold And Silver, Ray Gould Knickerbocker

Bachelors Theses

"As a general proposition, the conditions that favor successful amalgamation, and the factors that work against the success of the operation are reasonably well known. We know that if mercury contains certain impurities it will not pick up gold and silver efficiently. We know that if the gold and silver are not in proper condition the mercury will not work as it should. We also know what some of these impurities are, and have some idea as to what condition the gold and silver should be in, but the exact data on these conditions and their effects are lacking. The …

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The Nature Of The Reactions Occurring In The Distillation Of Zinc From Its Ores And The Effect On The Speed Of These Reactions Due To Certain Variables, Robert Glenn Sickly, Charles Yancey Clayton Jan 1913

The Nature Of The Reactions Occurring In The Distillation Of Zinc From Its Ores And The Effect On The Speed Of These Reactions Due To Certain Variables, Robert Glenn Sickly, Charles Yancey Clayton

Bachelors Theses

"The reactions that occur in the metallurgy of zinc are in general well known as to the end results obtained. The zinc smelter desires a maximum recovery in a minimum time. There are certain factors that govern the fulfillment of this desire. The most important of these are TEMPERATURE, TIME, KIND OF REDUCTION MATERIAL, and THE NATURE OF THE ORE. There is much data available as to the temperatures at which these reactions go on and also there is obtainable some information as to the speed with which these reactions progress, particularly as to the length of time required for …

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Old Hickory Trucks, Kentucky Library Research Collections Jan 1913

Old Hickory Trucks, Kentucky Library Research Collections

Research Collections

Advertisement for Old Hickory trucks produced in Louisville, KY by Kentucky Wagon Manufacturing Company

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Municipal Highway Design, Karl C. Schmidt Jan 1913

Municipal Highway Design, Karl C. Schmidt

Undergraduate Theses and Senior Projects

No abstract provided.

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Two Lincoln (Nebraska) Typhoid Fever Epidemics Of 1911 And 1912., Herbert H. Waite Jan 1913

Two Lincoln (Nebraska) Typhoid Fever Epidemics Of 1911 And 1912., Herbert H. Waite

School of Biological Sciences: Faculty Publications

On August 29, 1912, I was requested by the Board of Health of the city of Lincoln to make an investigation to determine if possible the origin and cause of an outbreak of a disease reported as typhoid fever which was then prevailing. This outbreak was said to be most prevalent in one particular portion of the city and consequently attention was turned to that portion. Of the cases reported an investigation was made of over 60 individuals and after considering all the probable causes for the majority of those affected the conclusion was reached that all could be logically …

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Cost Of Brick Pavement Constructed, William Mcelroy Jan 1912

Cost Of Brick Pavement Constructed, William Mcelroy

Professional Degree Theses

No abstract provided.

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The Geology Of A Complexly Folded Area On Crooked Creek, In Crawford County, Missouril, Victor Harmon Hughes Jan 1912

The Geology Of A Complexly Folded Area On Crooked Creek, In Crawford County, Missouril, Victor Harmon Hughes

Professional Degree Theses

"The area comprising the subject of this thesis lies in the southwestern part of Crawford county, 2 1/2 miles east of Wesco and 12 miles south of Steelville, the county seat. It embraces all of sections 17 and 20 and portions of sections 7, 8, 16, 18, 19, and 21, township 36 north, range 4 west. The area is of special economic interest in that the formations exposed are the same as those occurring in the southeastern Disseminated Lead district of St. Francois, Madison, and Washington counties. Until discovered in 1910 by assistants of the Geological Survey, these formations were …

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Plans And Specifications Of A Proposed Plant For Treating The High-Grade Silver Concentrate Of The Buffalo Mill By Tube-Mill Amalgamation, Hector George Sylvester Anderson Jan 1912

Plans And Specifications Of A Proposed Plant For Treating The High-Grade Silver Concentrate Of The Buffalo Mill By Tube-Mill Amalgamation, Hector George Sylvester Anderson

Professional Degree Theses

"Pursuant to your orders regarding the making of experimental tests on the high-grade silver concentrate of the Buffalo Mill, both on a small and a commercial scale, to determine the feasibility of extracting the silver contents and refining the same to 999-fine bullion I beg to submit the results of my work which has extended through the past two months. In the majority of the tests I have used a small Abbe-Engineering pebble-jars which will hold easily 1500 grams of ore and have checked the results obtained in these cases by similar results obtained by charging 1000 lbs. of ore …

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A Study To Determine The Best Method Of Treatment For A Certain Gold-Silver Ore, Deane Dwight Harris, Duane Montgomery Kline Jan 1912

A Study To Determine The Best Method Of Treatment For A Certain Gold-Silver Ore, Deane Dwight Harris, Duane Montgomery Kline

Professional Degree Theses

"The purpose of this thesis is to find a suitable method for extracting the gold and the silver from an amalgamation tailing"--Purpose, page 1.

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Geology Of Beaver Quadrangle, Robert Justice Paulette, James Lawton Keelyn Jan 1912

Geology Of Beaver Quadrangle, Robert Justice Paulette, James Lawton Keelyn

Bachelors Theses

No abstract provided.

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Depreciation, Reginald Henry Brinton Butler Jan 1912

Depreciation, Reginald Henry Brinton Butler

Professional Degree Theses

"In estimating and stating working costs, we are often brought face to face with an important item of expense, for which no receipt is ever given and no invoice is ever rendered, viz: DEPRECIATION. For this reason perhaps the different ways of charging this liability are innumerable. No two people often have their minds cast into similar moulds and in the charging of this item, the human and personal factor enters very largely into consideration. People differ widely as to just what part of the capital must be laid aside to meet "changing conditions in trade" and what ought to …

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The Measurement Of Compressed Air And Its Consumption In Rock Drills, Homer Kent Sherry, William Porri Jan 1912

The Measurement Of Compressed Air And Its Consumption In Rock Drills, Homer Kent Sherry, William Porri

Bachelors Theses

"The object of this thesis is to investigate the measurement of compressed air and to determine its consumption in rock drills. Our intention at first was to run more exhaustive tests on the drills, but due to the large amount of work necessary in rigging up the apparatus and computing results, we found it necessary to curtail our work to representative types of the hammer and the piston machines. We regret being unable to give more complete data in regard to the drills, but hope to point out fields for future work since, with the increased facilities now at hand, …

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Crystallization Of Magmas, Norman L. Ohnsorg Jan 1912

Crystallization Of Magmas, Norman L. Ohnsorg

Bachelors Theses

"The object of this paper is to arrive at a better explanation of the segregation of magmatic solutions on cooling. In which magmas will be discussed from a chemical and metallurgical lien of reasoning, in showing why such minerals as apatite, magnetite, etc., having a comparatively low melting point, crystallize cut before feldspar and quartz, which have a comparatively high fusion point"--page 1.

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Statement Of Mining Costs In The Butte District Three Months Ending June First 1910, Clifford Leroy Conway, George Sylvester Thomas, George Francis Condon Jan 1912

Statement Of Mining Costs In The Butte District Three Months Ending June First 1910, Clifford Leroy Conway, George Sylvester Thomas, George Francis Condon

Bachelors Theses

"The following cost data were compiled from the monthly cost sheets of the several mines, through a period of three months, April, May and June 1910. These figures were obtained from the cost sheets of the Anaconda Copper Mining Co. and are exact in every instance. The scale of wages and the cost of supplies which prevailed during the period that these figures were created were as follows"--page 3.

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Testing Explosives, Frank James Flynn, Miller Edward Willmott Jan 1912

Testing Explosives, Frank James Flynn, Miller Edward Willmott

Bachelors Theses

"The following tests and experiments were carried on to determine: first, the utility of a certain well known method of making comparative tests of explosives and second; to show some of the conditions that influence the force and effect of a blast, such as the size of detonator, the use of tamping, the size of bore hole, and the size and number of free faces exposed to the blast"--Introduction, page 1.

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Electrode Potential Of Galena, Robert Emmett Dye Jan 1912

Electrode Potential Of Galena, Robert Emmett Dye

Bachelors Theses

No abstract provided.

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