Digital Commons Network^™

Cyaniding The Buckhorn Clay, Paul Richardson Cook

Professional Degree Theses

"The Buckhorn, Nevada, gold mine is peculiar in being a shallow kaolinized mass of material with basalt walls, having no direct connection with any of the usual gold bearing rocks, the average ore containing 16% water of hydratum. the cyaniding of this hydrant clayey material offered unusual difficulties compared with the usual gold quartz ore of Nevada. The ore body was thoroughly developed; then the mill was built according to the latest cyanide practice, with such changes as was thought the peculiar nature of this ore demanded. Upon starting the mill, the ore proved more difficulty to handle than had …

A Wet Process For The Extraction Of Mercury, Robert Glenn Sickly

Professional Degree Theses

"In this paper it will be the aim of the writer to deal as exclusively as possible with the Mercury Extraction Process as applied at the High-Grade Plant of the Buffalo Mines, Limited, Cobalt, Ontario, Canada. it will be necessary at times to refer to the treatment of the ore for the extraction of silver"--Introduction, page 2.

Mill Test And Conclusion Leading To The Design Of An Addition To Florida Pebble Phosphate Concentrator, Norman L. Ohnsorg

Professional Degree Theses

"The fact that 30% to 50% of the phosphate mined in this district is lost as tailing due to an inadequate method of concentration has caused no small concern and many attempts have been to develop a method, of economic value, for saving the phosphate lost"--Existing Conditions of Milling, Page 1.

A Report On "La Cotabambas Auraria" Mining Company, Hector Julio Boza

Professional Degree Theses

"The present report, relative to the studies on the value of Cochasayhuas and descriptive of what was discovered and worked by me in that mining district, is written in fulfilment [sic] the commission which was entrusted to me at the begining [sic] of the month of April last. Special circumstances give to the studies made and conclusions formed a certain and appreciable value. There already existing in the Company's works various crushing machines and small tanks for cyaniding, I was able to see in great part the results of my tests with the metal in the chemical laboratory, in the …

The Development Of A Copper-Silver Ore Body, Colwell Arba Pierce

Bachelors Theses

"During the years 1912 to 1915 the writer had charge of the Ruby Copper Company property near Patagonia, Arizona, and it was suggested that a review of this work, with costs and data, would be helpful to other engineers engaged in similar enterprises"--Introduction, page 2.

Design Of A Concrete-Steel Highway Bridge For Dry Fork Crossing, Salem Road, Phelps County, Mo., Edward V. Damotte

Bachelors Theses

No abstract provided.

Construction And Maintenance Of Kansas City Boulevard Pavements, Ralph Robert Benedict

Professional Degree Theses

"In the first years of the history of the Park and Boulevard System of this city, road surfaces for boulevards received careful consideration for people were not satisfied with a good earth road well maintained. As the years have passed and the great changes have come in the methods of transportation, the evolution of pavements has had to keep pace with these changes"--page 1.

The Flotation Of A West Joplin, Mo. Slime, John Stone Hoffman, James Joseph Dowd

Bachelors Theses

"Owing to the high price of zinc and the success attending flotation in other districts, intense interest was aroused in the flotation of slimes of the South-West Missouri District. These slimes are the accumulation of the finer particles of the ore during the milling process and their metallic content is generally higher than that of the original ore. They have been disposed of, in the past, by sluicing them to the tailings ponds because no economical method of saving the zinc had been discovered. The object of our experiments was to economically extract from these slimes, by flotation, a product …

Leaching Experiments On An Arizona Copper Ore, Gunnard Edmund Johnson

Bachelors Theses

"The object of this thesis was to obtain a general knowledge of the problems to be solved in leaching a typical carbonate copper ore or oxidized capping of the New Cornelia Copper Co.'s ore. The experimental work previously performed far exceeds any that might be attempted in the short time allotted to this work, and the few results obtained indicate that the ore is particularly favorable for leaching"--Scope of Thesis, page 1.

The Effect Of Temperature Upon The Crystal Size And Physical Properties Of Iron And Steel, Earl Joesting Mcnely

Bachelors Theses

"This investigation was deemed of sufficient merit to require the work of two terms. It naturally is divided into two parts, i.e., the effect that temperature has upon the crystal size; and the effect that temperature has upon the physical properties of iron and steel"--page 3.

An Investigation In Concrete, Don H. Morgan

Bachelors Theses

"It is the purpose of this investigation to determine the effect of blending a portland cement with a fine silica sand. A blended cement such as this has been used successfully and economically in several important works. The United States Reclamation Service and the Los Angeles Aqueduct commission have made use of such a blended cement in several important structures. This dilution, so to say, of the cement results is a decrease in cost without a loss of strength. In this investigation it has been assured that the cement retained on a #200 sieve is inert and may be replaced …

Method And Cost Of Rock Excavation, Inlet Swamp Drainage District, Lee County, Illinois, Arch W. Naylor

Professional Degree Theses

"The Inlet Swamp Drainage District, comprising 32000 acres of rich muck land, lies in Lee County Illinois, between the Chicago and Northwestern Railway, the Illinois Central Railway and the Chicago, Milwaukee and St. Paul Railway. The District is fifteen miles long and from one to five miles wide. The watershed has approximately five times the area of the swamp, and in early days, as much as one-half the thirty two thousand acres was under water for practically the entire year. It was not unusual in the Spring, for the swamp to be under from two to five feet of water. …

Land Drainage In Central Iowa, Ernst Lorenze Chamberlain

Professional Degree Theses

"The problems encountered in land drainage are comparatively simple when seen from an engineering point of view. Most problems do not require a fine scientific or mathematical analysis but are rather questions to be decided by good judgment or practical common sense. The most difficult problems encountered are financial, legal and political, therefore, in this paper considerable attention is paid to the Iowa drainage law, facts learned from practical drainage men and to the organization and operation of the different financing systems for drainage"--page 1.

An Investigation Of Blended Cements, Byron Lee Ashdown

Bachelors Theses

"It is generally accepted to be a fact that the coarser particles of a cement are practically inert, and that it is only the finest particles that possess the cementing qualities. Exactly what percentage of the whole is active, or possesses the cementing properties, is not known. Since but few experiments pertaining to such have been performed there is consequently little data to be found"--Introduction, page 3.

Flotation Applied To Silicate Sludge, Yaro Klepel, Greene Erskine

Bachelors Theses

"Within the past few years great success has been made of the flotation of sulfids, and to a certain extent of carbonates.

Since sulfids are easily recovered by flotation it seems practicable that silicates could be made to float by first sulfidizing them, and then subjecting them to ordinary flotation treatment.

This problem involves the treatment of a silicate sludge obtained from the Joplin district, the sludge will easily pass through a 250 mesh screen. At the present time this sludge is being sent to the tailings pond.

The experimental work of this thesis was done along the line of …

Leaching Flue Dust, Edwin Alexander Kayser

Bachelors Theses

"The usual method of treatment has been to charge the "flue dust" into reverberatories and smelt it with the regular charge of calcined ore. There was a consequent cost of handling and a serious loss thru furnace draft and boiling, due to the fine state of division of the material and the presence of sulphates, acid, and moisture.

The object of the paper is to treat this material by some leaching process, which will eliminate the above enumerated losses, and at the same time present the finished product at a lower cost, and with a higher extraction per ton, than …

Pneumatic Ore Concentration, Robert Winters Johnson, Walter William Weissbach

Bachelors Theses

"The concentration of lead and zinc ores by means of air is practically an unexplored field, although the subject is by no means a new one. Considerable research work has been done and several methods, processes and machines have been developed, but little or nothing has been accomplished towards making air separation a success. the lack of success has been due mainly to two reasons:- (1) That very little has been known about the internal conduct of air currents, and (2) that nearly all methods and machines so far worked out have presupposed the fact that the ore to be …

Mining Methods Of The Calumet And Arizona Mining Company, Warren District, Cochise County, Arizona, James Lawrence Head

Bachelors Theses

No abstract provided.

Report On The Lucky Bill Mine, Bayard, Grant County, New Mexico, Walter Gammeter

Bachelors Theses

"The Lucky Bill Mine is located, with reference to the Mining Districts of the State of New Mexico, in what is known as the Central Mining District. The Central Mining District includes the Sant sic Rita and Hanover regions in the north and eastern portions and camps within a radius of about six miles about the town of Central in other directions. The mining districts bounding the Central District are on the north the Georgetown District, on the west and south the Silver City District and on the east the Hillsborough District"--Location of the Mine, Page 1.

A Study For Comparative Costs Of Flat, Short Span, Concrete Steel Highway Bridges, Thomas Purcell Mccague

Bachelors Theses

"The importance of steel in the construction of long span highway bridges is well understood, but it's cost and the constant heavy maintenance charges, or it's rapid deterioration, if not properly maintained, have caused builders of bridges to seek some other material, which is low is first cost and which will not require constant painting. Se we consider concrete and concrete steel"--page 2.

Oils And Flotation, Clarence Eugene Peterson, Charles Yancey Clayton

Bachelors Theses

"We know that the sulphides, or minerals with a metallic lustre, can be floated either with or without oil and that the carbonates, silicates, etc., cannot be floated so readily. Why do certain oils have the power of selecting certain minerals? Why do certain oils produce froth? Why do certain oils give a watery froth? Why do some give an ephemeral froth and others a tough one? Of the thousands of oils known, only a few classes have found successful application in this new process...This leads us to the question, what property or combination of properties make oils valuable as …

Treatment Of A Complex Ore, Earl Burdette Weiberg, Hugo Edward Koch

Bachelors Theses

"Many complex ores are found in the West, which contain zinc in large quantities together with lead, copper, gold, and silver in sufficient amounts to yield a good profit could they be separated from the zinc economically, If such an ore were sent to the smelter to be treated in a blast furnace for the recovery of lead, copper, gold, and silver the smelter would penalize the shipper for all zinc over ten percent. On the other hand if the ore were sent to a zinc smelter for direct treatment there would be a penalty for excess lead present, and …

Notes On The Development Of The Flotation Process For Concentrating Copper And Iron Sulphide Ore, Holman Thompson Marshall

Bachelors Theses

"The first flotation machines was installed at the Magna Mill of the Utah Copper Co. in August and September, 1914. The outbreak of the war in Europe having made necessary the shutting down of the Arthur Mill of the same company, the flotation plant was installed at Magna for the purpose of carrying on experiments which had been in process at Arthur. Enough experimentation had been done with the small laboratory machine at Arthur, and results obtained were favorable enough to warrant the installation of a full size Janney machine"--page 1.

Problems In Flotation, William Henry Mccartney

Bachelors Theses

"Little has been done to classify oils on the basis of their action as flotation agents, either for their frothing or their selective qualities...This investigation was undertaken chiefly to aid in effecting such a classification"--page 3.

The Cost Of Producing Electricity At The Hamilton, Missouri Light And Power Company, Bernerd William Adams

Bachelors Theses

"For those seeking information on the cost of producing electricity in steam plants, an unlimited amount of data may be found in the technical journals and text books. This information, however, is obtained from a careful analysis of the daily and hourly records kept by the largest central stations, hence, production costs are available only where the yearly out-put is several million kilowatt-hours. the small isolated stations of from one hundred to two hundred kilowatt capacity have not as a rule, become progressive enough to keep a complete record of operating costs...The test hereinafter reported was conducted from August 3rd. …

A Study Of A Certain Filled-Sink Ore Deposit, Azmon Thurman Dunham

Bachelors Theses

"This mine, which is located about 3-1/2 miles southeast of Sullivan in the extreme northeast corner of Crawford County, Mo., was first known as the Sullivan and Bridoll Mine of the old Hamilton Iron Company. It has been operated discontinuously since about 1870. Until 1904 it was worked solely as an iron mine, but at that time development work for copper was started, and from 1905 to 1909 to mine treated only this metal. It is not known how many pounds of copper the mine has produced, but during one 20 day run in 1904 of which there is record, …

The Rollamo 1916, The University Of Missouri School Of Mines And Metallurgy

Yearbooks

No abstract provided.

Some Chemical Problems In Geology, Reginald Scott Dean

Masters Theses

"This thesis is in the main a compilation of the views held at this institution in regard to the problems discussed as interpreted by the author. No claims for originality are made except in the manner of presentation as the material used has been obtained by conference and class room work with Professor V. H. Gottschalk and Professor G. H. Cox and also to some extent with H. A. Buehler, State Geologist. On the other hand the material is an expression of these ideas as assimilated by the author and hence may in certain cases differ radically from the views …

The Missouri Miner, December 17, 1915

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, December 10, 1915

The Missouri Miner Newspaper

No abstract provided.