Engineering Commons^™

The Thermal Conductivity Of Refractories, Boyd Dudley Jr.

Professional Degree Theses

"The usefulness of correct data in regard to the thermal conductivity of refractories and other materials used in the construction of metallurgical and industrial furnaces is quite generally recognized. Numerous investigations of this property of refractories have been conducted, and in many cases the published data of different investigators are somewhat conflicting. This is particularly true of figures pertaining to materials intended for use at high temperatures, and it is with such materials that the metallurgist is mot interested. The difficulties in the way of precise determinations of thermal conductivities at elevated temperatures are numerous, and it is not particularly …

The Seneca-Superior Mine And Mill, Maurice Merton Albertson

Professional Degree Theses

"The Seneca Superior Mine lies under Cart Lake which is located about a mile south of the city of Cobalt. It was discovered by crosscutting during the year 1912 and although it is one of the smaller properties of the Cobalt district it has been, and continues to be, a large producer"--Description of the Seneca Superior Mine, page 1.

The Development Of A Process For The Treatment Of A Complex Ore, Charles Adrian Burdick

Professional Degree Theses

"The writer has carried out tests to determine the most feasible method of treating a complex ore from Tecolote, Sonoro [sic], Mexico. The ore contains gold, silver, copper and zinc"-- Introductory, page 1.

Study Of The Monthly Extraction Record And Curve Of A Modern Mexican Cyanide Plant, George William Harris

Professional Degree Theses

"This data is taken from the records of the mill and cyanide plant belonging to Compania de Minas La Blanca y Anexas, S.A., Pachuca, Hidalgo, Mexico; of which the writer has been in charge during the four years it has been in operation. The plant may be termed a "silver plant" as the silver values predominate, the ratio being about 200 grams of silver to 1 gram of gold"--Introduction, page 1.

An Investigation In Treating A Gold Ore From Custer, South Dakota, Theodore Saunders Dunn

Professional Degree Theses

"The following investigation was undertaken to determine the adaptibility [sic] to amalgamation and cyanidation of a certain ore from the property of Mr. Charles Bush near Custer, South Dakota. A preliminary sample of the ore was obtained and laboratory tests made upon it. A ton lot of the ore was then put through the ore dressing laboratory at the South Dakota School of Mines. Upon examination the large sample was found to differ in value and to some extent in character from the preliminary sample, but the scheme of treatment worked out for the first sample was found to work …

The Design Of A Reinforced Concrete Arch Highway Bridge, Clinton Dewitt Smith

Bachelors Theses

"The Subject of this theses is the Design of a Reinforced Concrete Arch Highway Bridge. In making the Design the crossing of South River Street, Austin Minn., was taken as the hypothetical location of the bridge and the design made with reference to the requirements of this location. These requirements are no more than those for an ordinary rural highway bridge. While in the city of Austin it is not in the route of travel to and from the depots and is hence not subjected to the loads due to heavy freighting. There is however a heavy rural traffic, this …

Engineering And Geological Work At Cananea, Mexico, Edward Dale Lynton

Professional Degree Theses

"The purpose of this thesis is to relate in as clear and concise a manner as possible the way "things are done" in practice as observed by myself during my two years' experience as sampler and assistant geologist to the Cananea Consolidated copper Co. of Cananea, Sonora, Mexico. My work took me to all the mines, and in this way I was able to accurately observe the sampling, system of mining, geology, etc. of this famous and important camp"--page 1.

The Method Of Mining And Milling At The Rosiclare Lead And Fluor Spar Mines, Arthur Harrison Cronk

Professional Degree Theses

"The American fluor spar mines of economic importance are located in the Southern part of Illinois and Western Kentucky. The largest mines are in Hardin County, Illinois, Those in Kentucky are in Crittenden, Livingstone and Caldwell Counties. At the present time the Illinois mines are the largest producers. The two principal mining companies in operation are: The Rosiclare Lead & Fluor Spar Mines and the Fairview Fluorspar & Lead Mines. These mines are located about a half mile from Rosiclare which is on the Ohio River"--Location, page 1.

A Study Of The Stoping Efficiency And Ore Transportation Of The Arizona Copper Company At Morenci, Arizona, Robert Stanley Burg

Bachelors Theses

"The purpose of this paper is to give a description of the most important mining operations of the Arizona Copper Company at Morenci, Arizona, during the years 1911, 1912 and 1913. This work was planned in the engineering department by the mine superintendent, Mr. John Kiddie, while the author was employed in his office as chief mine surveyor from November 1911 to September 1913. As in other mining districts of the southwest, the rich contact and pocket, copper deposits in the Clifton-Morenci district have been nearly exhausted, necessitating the development and extraction of the low-grade porphyry deposits"--Introduction, Page 1.

Comparative Tests Of Piston-Drill Bits, Lister Merriken Cummings

Bachelors Theses

"The purpose of this investigation is to compare the relative cutting speeds and efficiency of some of the different types of rock drill bits used in the piston machine, including the regular cross bit, the low center cross bit, a so-called "flat" cross bit, the "Z" bit of the southeast Missouri type, and the Joplin "Bull" bit"--page 2.

An Efficiency Test Of A Laboratory Fan, Daniel Webster Blaylock, Edward Albrecht Schroer, Elton Arthur Miller

Bachelors Theses

"The principal object of these tests is to determine the efficiency of the fan when working against the different sized orifices at various speeds and pressures. Before this could be accomplished, the coefficients of discharge of the 18 in., 24 in., and 30 in. orifices had to be determined"--Object of Tests, page 4.

Structural Material Requirements In Municipal Building Codes, August Wilhelm Gleason

Bachelors Theses

"An examination of the various Building Codes and ordinances of American cities shows some little variation in requirements and specifications for structural Each writer or engineer, to whom has been assigned the task of preparing the several codes, has had individual theory or rule which he embodies in the work while holding in the main to the generally accepted provisions. It is for the purpose of comparing the variations in the different codes with the hope of deducing what might be considered as standard practice, that this investigation has been started"--page 4.

Effect Of Compression And Transmission On The Illuminating And Heating Value Of Carburetted Water-Gas, Horace Herbert Clark

Bachelors Theses

"The object of this series of tests was to determine the effect of compression upon the candle power of carburetted water gas, as made in the daily operation of a three piece water gas machine, cooled in condensers, passed through shavings, scrubbers and oxide material, and thence into a storage holder, ready for compression and distribution. The apparatus consisted of a small Westinghouse air compressor; nine storage tanks of six inch wrought iron pipe; transfer pump; pressure regulator; standard one hundred inch bar photometer, complete, with regulators, clock, meter, pentane lamp, etc., gas analysis outfit, complete; also gages, thermometers, etc."--Page …

The Cyaniding Of A Mexican Silver Ore, Homer Marvon Wilson, Roy Watson Griffin

Bachelors Theses

"The purpose of this thesis is to determine whether or not a certain Mexican silver ore is amenable to cyanidation"--Purpose, page 1.

Flotation Applied To A Mexican Silver Ore, Albert Leo Trent

Bachelors Theses

"The object of this thesis is to determine the advisability of treating this Mexican Silver ore by flotation. To do this it was necessary to determine the degree of crushing, the kind and amount of oil, the amount of acid, the time of agitation, and the dilution of pulp, which would give the best results. From the following tests a suitable conclusion of the best conditions of this ore was determined"--Introduction, page 1.

The Relation Of The Composition Of Petroleum To Its Origin And Occurrence, John Warder Shotwell

Bachelors Theses

"Petroleum Is a mixture of hydrocarbons. It is a liquid varying from colorless, through yellow and brown to black. It varies from 1.0 to 0.80 in specific gravity, which corresponds to 10° to 45° Beaume. It varies widely in physical properties, such as viscosity, ignition point, polarization of light, etc. Chemically it is composed essentially of carbon and hydrogen, but usually contains impurities such as sulphur and nitrogen. The carbon and hydrogen combine with each other to form certain series, or "chains"--Chemical and Physical Nature, page 1.

Geological Mapping Of An Area Along The Frisco Railroad Between Cuba And Saint James, Willard Miles Benham, William Elliott

Bachelors Theses

"The chief object of the work has been the location of the Roubidoux-Jefferson City contact, if it occurred within a mile of the railroad. Distances and positions along the track were obtained by the use of a map and by counting telephone poles. Other locations were made by obtaining their bearing and distance from these points by the use of a compass and by pacing. Elevations were carried by aneroid barometers, using the railroad elevations at mile points as bench marks. An attempt has been made to locate all important outcrops; but these are shown only on the field map. …

Bituminous Coal Mining In Northern Missouri, True Walter Blake

Professional Degree Theses

"Missouri was the first state west of the Mississippi to produce a commercial output of coal and, although in later years some of the western states have produced a larger yield, still the Missouri mines bid air to hold their present standing as there are hundreds of acres of virgin coal land in this state that will be able to be worked profitably after the eastern coal operators have worked out their thicker veins of coal. The coal is won from the grasp of Mother Earth by either room-and-pillar or longwall systems in the larger mines, each method being employed …

Amalgamation And Refining Of High Grade Silver Ores Containing Arsenic And Antimony, Edwin Bryant Thornhill, Robert Emmett Dye

Professional Degree Theses

"The advantage of shipping refined silver bullion over the shipment of concentrate to a smelter has been apparent to mine operators in this district for years but not ill recently was the project undertaken by the Buffalo Mine Limited, Cobalt, Ont., Canada. Early in 1912 experiments were conducted by H. G. S. Anderson with this end in view. The results of these experiments led to the erection of an amalgamation plant, the design and construction of which was carried out by Mr. Anderson...It is not the hope in this paper to set forth facts that are entirely new as similar …

Report On Bellshazar Mining Property, Matthew Vincent Quinn

Professional Degree Theses

"The property of the Belshazzar Gold Mine is located in the Granite Creek Mining District of Boise County, State of Idaho. This district forms the northern boundary of the famous Boise Basin which has produced over two hundred million in placer gold. The Balshazzar property is about three and a half miles from the town of Quartzburg and about four miles from the town of Placerville. A good wagon road connects the property with both towns"--Description of the District, page 3.

Design Of A 250 Ton Mill, For Cyanidation Of A Cobalt Silver Ore, Carlos Enrique Elmore Y Guerra

Professional Degree Theses

"My aim in the designing of this 250-Ton Mill for cyanidation of a Cobalt Silver Ore, has been to select the simplest process of extraction in connection with the Labratory [sic] Experiments which showed the highest per cent of extraction. Care has been taken in the selection of the machinery, and the location of it in the Mill is such, that if a greater capacity is required, that could be done without interfering with the machines in the Mill in question"--Introduction, page 1.

Methods Of Prospecting And Estimating Ore Bodies Of The Wisconsin Zinc And Lead District, Guy Henry Cox

Professional Degree Theses

"The stratigraphy and structure of the Wisconsin Zinc and Lead District are remarkably simple; so simple in fact that one is liable to under estimate their importance in relation to the ore deposits. But four formations are of interest to one operating in this district, all of which are Ordovician in age and which in ascending order are, - the St. Peter sandstone, the Platteville limestone, the Galena dolomite, and the Maquoketa shale"--Geology - Stratigraphy - General, page 1.

Leaching Copper Tailings, Howard Gove Halsey, Frederick Gallaway Moses

Bachelors Theses

"There are, scattered throughout the country, enormous amounts of rock that, by the discovery of a quick, cheap, and practiable sic method of extracting their metallic content could be turned into valuable ores. This has already been accomplished for gold and silver by the adaption of the cyanide method to their treatment. The next in order, both because of the value of the metal and the amount of material available in mill dumps and in the ground, is copper. there are dumps containing millions of tons of this material lying idle because of the fact that with the present methods …

A Comparison Of Crushing Machines, Clyde Willis Hall, Walter Henry Wager

Bachelors Theses

"Much has been written on the comparative efficiency of the various sorts of crushing machines used in the art of Ore Dressing, but it must be confessed that the subject has by no means been reduced to one of the exact sciences as yet. This is rather a sad condition of affairs, for as is of course apparent to the most casual observer, the whole fabric of ore dressing rests and depends to a large degree on the efficiency and economy of the crushing machinery. Inefficient crushing means high costs, irrespective of the thoroughness and cheapness with which the ensuing …

Comparative Tests Of Rock Drill Bits For Piston Machines, Thomas C. Robson, Miguel Leon Cepeda

Bachelors Theses

"The object of this thesis is to find out the relative cutting qualities of different kinds of rock drill bits. The bits tested were: the regular cross bit, the Z bit of the Southeast Missouri type and the bull bit of the Joplin type. All these bits were made on a No. 5 Leyner sharpener and were tempered as nearly alike as possible. All conditions were kept as nearly uniform as possible during the various tests; air pressure, length of stroke, size of bit, etc., the only variables entering being the difference in bits and personal equation of operators"--Introduction, page …

Investigation With Rock Drills, Tirso CastillóN

Bachelors Theses

"The object of this thesis is to investigate the different shapes of bits in rock drilling. My intention at first was to run more extensive tests on bits, but due to the large amount of work necessary in rigging up the apparatus, and the maintainence sic of same, I found it necessary to reduce my work to two bits, which I name Flat and Regular, the Flat Bit being an invention of Professor C. R. Forbes, and the Regular Bit being the common one used by the Leyner Company"--page 2.

Mining Methods And Geology Of The Boston Consolidated Mine At Bingham, Utah, James Leonidas Boucher

Bachelors Theses

"This thesis does not so much attempt a detailed report on the geology of the disseminates ores of Bingham Canyon as a more particular description of the underground methods of mining these ores as well as studies in drilling, sampling, etc. Steam shovel mining was studied to some extent but almost all the data for the following pages has been derived from the Boston Consolidated Underground Mine and the Old Utah Mine. The Boston consolidated, especially, has been studied for this mine is the largest and, at late date, was the only underground porphyry mine working, the Old Utah having …

The Development Of Mine Number One Of The Chinook Coal Company, Limited, Lethbridge, Alberta, Canada, Theodore Saunders Dunn

Bachelors Theses

"The Lethbridge Mining District lies about 50 miles north of the International Boundary and approximately 280 miles north of Great Falls, Montana. The country is rolling prairie with deeply cut river vallies sic and is practically treeless except for a few willows along the river bottoms. The rainfall is moderate but the climate is severe; the summers being short and hot while temperatures of -50 degrees F. are not uncommon during the long winters. On account of the severe winters and the scarcity of timber there is a good market for coal during the entire year as it is the …

Tests Of Rock Drill Bits For Water-Leyner Machine, Riley Marsh Simrall, Edmond Otis Stoliker

Bachelors Theses

"The above investigation was made in the Mining Laboratory of the Missouri School of Mines, under the direction of Prof. C. R. Forbes, with the following object in view: To make comparative tests of various types of regular and special bits for the Water-Leyner machine as to drilling speed and total distance drilled by each bit without resharpening"--Introduction, page 2.

Investigation Of Rock Drill Bits, George Elmer Abernathy

Bachelors Theses

"The object of this thesis is an attempt to determine the relative efficiency of rock drill bits.

The bits compared were the ordinary double chisel bit, sharpened with a Leyner drill sharpener, and the same bit after it had been filed so that the point was not sharp, but a flat surface 3/32 of an inch wide at the outside, diameter of the bit and tapering to a point at the center of the bit"--page 1.