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Articles 76411 - 76440 of 77213

Full-Text Articles in Engineering

Comparison Of Ethyl Cellulose And Nitrocellulose In Lacquers., William Wilson Pedersen 1916-2006 Jan 1938

Comparison Of Ethyl Cellulose And Nitrocellulose In Lacquers., William Wilson Pedersen 1916-2006

Electronic Theses and Dissertations

No abstract provided.


Factors Involved In Improving The Blush Resistance Of Lacquers., Franklin D. Snyder Jan 1938

Factors Involved In Improving The Blush Resistance Of Lacquers., Franklin D. Snyder

Electronic Theses and Dissertations

No abstract provided.


Heat Transfer Studies Of A Hydrocarbon Oil., W. R. Barnes Jan 1938

Heat Transfer Studies Of A Hydrocarbon Oil., W. R. Barnes

Electronic Theses and Dissertations

No abstract provided.


The Control Of The Grain Size Of Tin., Robert D. Macdonald May 1937

The Control Of The Grain Size Of Tin., Robert D. Macdonald

Bachelors Theses and Reports, 1928 - 1970

The tin alloys of tellurium are extremely hard and have very great tensile strength. It was thought that the reduction of the rate of grain growth of tin with the addition of tellurium accompanied this hardening and strengthening and such way found to be true.


The Electroplating Of Cadmium From Sulfate Solutions, Lewis S. Prater May 1937

The Electroplating Of Cadmium From Sulfate Solutions, Lewis S. Prater

Bachelors Theses and Reports, 1928 - 1970

It has been proven that cadmium forms a very satisfactory plate on steel, which has to withstand severe corrosion, especially the corrosion of sea water and spray. The metal is now successfully plated electrolytically from cyanide solutions, but wherever work is carried on with cyanide, there is great danger of poisoning to the workers.


The Inhibitory Effects Of Carbonaceous Materials On The Cyaniding Of Gold Ores., David Currie Jr. May 1937

The Inhibitory Effects Of Carbonaceous Materials On The Cyaniding Of Gold Ores., David Currie Jr.

Bachelors Theses and Reports, 1928 - 1970

Carbon and carbonaceous material have been known to have a deleterious effect upon the cyanidation of gold and silver ores since the very beginning of the process. Organic matter is a common source of impu­rities in cyanide solution, its reducing effect being notorious.


The Electrical Conductivity Of The Copper-Aluminum Alloys., William W. Hintalla May 1937

The Electrical Conductivity Of The Copper-Aluminum Alloys., William W. Hintalla

Bachelors Theses and Reports, 1928 - 1970

Among the many aluminum alloys which have been studied are the binary copper-aluminum alloys. These have proven to be among the most useful of the alumi­num alloys thus far worked upon.


The Effect Of Temperature On The Rate Of Dissolution Of Gold In Cyanide Solutions Which Have A Constant Oxygen Content., Robert Currie May 1937

The Effect Of Temperature On The Rate Of Dissolution Of Gold In Cyanide Solutions Which Have A Constant Oxygen Content., Robert Currie

Bachelors Theses and Reports, 1928 - 1970

Since the development of cyanidation into a highly efficient process for treating gold ores, many papers have been written on its various aspects. Although, there has been much work done on it, the chemistry of the reaction is not yet completely understood.


The Presence Of Rhenium In Montana Manganese Ores., Henry E. Swanson May 1937

The Presence Of Rhenium In Montana Manganese Ores., Henry E. Swanson

Bachelors Theses and Reports, 1928 - 1970

Rhenium properties offer many interesting possibilities, therefore any ores containing rhenium would be of considerable value. Its close relationship to manganese in the periodic table led to the belief that manganese ores would be an excellent place to search for the metal. Investigation of the literature of rhenium revealed that no ore was known to contain more than 0.001 per cent of rhenium.


The Electrowinning Of Copper From Roasted Sulphides, Thomas B. Linn May 1937

The Electrowinning Of Copper From Roasted Sulphides, Thomas B. Linn

Bachelors Theses and Reports, 1928 - 1970

A hydrometallurgical process for the recovery of copper from flotation concentrates has long been con­sidered an attractive possibility. The object of such a method is to produce electrolytic copper without resorting to expensive matte smelting and converting.


Electrolytic Recovery Of Copper And Zinc From Brass, D. H. Swank May 1937

Electrolytic Recovery Of Copper And Zinc From Brass, D. H. Swank

Bachelors Theses and Reports, 1928 - 1970

The purpose of this research was to continue the work of Thomas Parker, who worked on the recovery of copper and zinc from brass during the school year l934 - 1935. Since there is such a wide variety of brasses made with usually a third alloying constituent, remelt­ed scrap is suitable only for castings of wide tolerance in specifications.


Geology Of The Tuxedo Mining District, R. W. Lawson, B. R. Tarrant, A. L. Gallagher May 1937

Geology Of The Tuxedo Mining District, R. W. Lawson, B. R. Tarrant, A. L. Gallagher

Bachelors Theses and Reports, 1928 - 1970

The Tuxedo mining district lies fifteen miles west of Butte on the south east end of Deer Lodge valley. Prospecting and mining has been carried on in this district for about 20 years. As a result many pits have been dug, several adits have been driven, and two or three shallow shafts have been sunk.


The Deposition Of Monomolecular Films., Albert Wilbur Schlechten May 1937

The Deposition Of Monomolecular Films., Albert Wilbur Schlechten

Bachelors Theses and Reports, 1928 - 1970

The formation of monomolecular films is possible because of the action of the heteropolar molecules of certain fatty acids, especially stearic. Under the proper conditions the acid will spread out until a monomolecular film is formed.


Development And Operation Of The Universal Coal Mine, Clinton, Indiana, Horace Herbert Clark Jan 1937

Development And Operation Of The Universal Coal Mine, Clinton, Indiana, Horace Herbert Clark

Professional Degree Theses

No abstract provided.


Line And Grade Control Of The Subaqueous Midtown Hudson Tunnel, Lauren Preston Tuttle Jan 1937

Line And Grade Control Of The Subaqueous Midtown Hudson Tunnel, Lauren Preston Tuttle

Professional Degree Theses

"The entire system unifies all Preliminary Survey, Construction Control, and Independent Traverse work; bringing them under one common balanced system; thus, their precise relation is definitely established regardless of which side of the Hudson River the unit occurs. The establishing of a complete system is a subject within itself, and as this paper deals with the method of obtaining and carrying to completion the method of control for the river section of the tunnel, we shall limit our reference to the Triangulation system to the River Quadrangle"--Triangulation System. General, page 1.


Highway Bridges, Design And Cost, John Edward Kirkham Jan 1937

Highway Bridges, Design And Cost, John Edward Kirkham

Professional Degree Theses

"Specifications for highway bridges have been modified considerably during the past 15 years. The principal modifications have been the result of the continuous development of motor traffic. The principal changes made have been with reference to live load, impact, and allowable unit stresses. The live load has been changed to conform with the increased weight of modern motor traffic; impact has been included to provide for the effect of heavy fast-moving trucks; and the change in unit stresses has resulted by agreement of engineers. The following specifications, which will be used herein, are practically excerpts from "Specifications for Highway Bridges," …


Manufacture And Application Of Rubber Belting, Lynn Harbison Jan 1937

Manufacture And Application Of Rubber Belting, Lynn Harbison

Professional Degree Theses

"Rubber belting is one of the major products manufactured by the rubber companies and a wide variety of applications is found among many industries. These applications require belts which will meet the needs of the purchasing party both from a cost and a maintenance viewpoint. Belts are installed and operated for two basic purposes, namely, transmission of power and conveyance of level...Transmission and conveyor belting are fundamentally the same for one important factor; this factor is power transmission. Other data are necessary to make and select a belt of the proper type, construction and size. The subject of rubber being …


Design And Construction Of Ponds And Small Reservoirs, Harry Franklin Bossert Jan 1937

Design And Construction Of Ponds And Small Reservoirs, Harry Franklin Bossert

Professional Degree Theses

"In presenting this paper, "The Construction of Ponds and Small Reservoirs", the writer wishes to call attention to a report by the National Resources Committee entitled "Little Waters : A Study of Headwater Streams and Other Little Waters: Their Use and Relation to the Land"--Introduction, page 5.


The Express Highway Through The City Of St. Louis, Fulton Hord Campbell Jan 1937

The Express Highway Through The City Of St. Louis, Fulton Hord Campbell

Professional Degree Theses

"Among the many important highway construction projects undertaken in Missouri, the Express Highway through the City of St. Louis ranks among the first both because of the coast and difficulties involved, and because of the improvement in traffic conditions which it provided. This highway enters the city at the southwest corner of Forest Park, which is the junction of Skinker Road and Oakland Avenue. The accompanying map will give an idea of the location of the highway from this point to its end, a distance of approximately two and ninety-six one hundredths miles. The most noteworthy feature is that there …


The Development Of A New Process For The Manufacture Of Insulating Refractories, Miles E. Tyrrell Jan 1937

The Development Of A New Process For The Manufacture Of Insulating Refractories, Miles E. Tyrrell

Bachelors Theses

"In as much as the grinding of insulating brick to size after the firing operation is one of the most important and at the same time one of the most expensive operations involved in their manufacture, it was felt that the development of a method for manufacture of insulating brick which would do away with the necessity of grinding after firing would be a very worth while project. With this object in mind it was decided that the logical method would be to incorporate the pore structure in the mix while green and at the same time to add some …


A Comparison Of Silicates Of Sodium And Potassium As The Bonding Agent In Cold-Set Refractory Cements, Kenneth Frederick Sheckler Jan 1937

A Comparison Of Silicates Of Sodium And Potassium As The Bonding Agent In Cold-Set Refractory Cements, Kenneth Frederick Sheckler

Bachelors Theses

"The insistent demand for higher grade refractories has resulted in the manufacture of a product which will withstand higher temperatures, have greater slag resistance, greater resistance to spalling action and deformation under load. These better grades of refractory materials have been developed as the result of extensive research on the part of the manufacturers. In order that these higher quality refractories may be employed with the best results, it is necessary that they be set with a refractory cement which also possesses these desirable properties. The commercial refractory cements may be divided into two classes according to their method of …


The Development Of Spinels In Two Component Coloring Oxide Systems And Their Applications As Underglaze And Overglaze Colors, Michael Edward Green Jan 1937

The Development Of Spinels In Two Component Coloring Oxide Systems And Their Applications As Underglaze And Overglaze Colors, Michael Edward Green

Bachelors Theses

"For many years the fact has been known that when two or more of the coloring oxides are intimately mixed together and fired, there is a reaction between the components of the mixture. Little is known of these reactions - whether they are chemical, physical or mineralogical changes in the nature of the substances. The purpose of this investigation has been to ascertain the true nature of these reactions and the effect of the changes in the two components making up the system, upon their uses as underglaze and overglaze colors as applied in the ceramic industry"--Introduction, page 1.


Zig-Zag Leakage Of An Induction Motor, Carl E. Matheis Jan 1937

Zig-Zag Leakage Of An Induction Motor, Carl E. Matheis

Bachelors’ Theses

The object of the writer is to plot the maps of zig-zag leakage in an induction motor sir-gap for the four principle positions of the rotor slots with reference to the stator slots.


A Study Of The Influences Of Flooding And Hydrolysis On Decomposition Of Complex Silicates, Aggregation, And Fertility In The Coastal Prairie Soils., John Fielding Reed Jan 1937

A Study Of The Influences Of Flooding And Hydrolysis On Decomposition Of Complex Silicates, Aggregation, And Fertility In The Coastal Prairie Soils., John Fielding Reed

LSU Historical Dissertations and Theses

No abstract provided.


Cooling Of A Hydrocarbon Oil., Edward Groth Jan 1937

Cooling Of A Hydrocarbon Oil., Edward Groth

Electronic Theses and Dissertations

No abstract provided.


The Effect Of Ph Value And Pressure Cooking On The Mashing Of Corn., Chester E. Brown Jan 1937

The Effect Of Ph Value And Pressure Cooking On The Mashing Of Corn., Chester E. Brown

Electronic Theses and Dissertations

No abstract provided.


Pyrochemical Changes In Missouri Halloysite, Frank Joseph Zvanut Jan 1937

Pyrochemical Changes In Missouri Halloysite, Frank Joseph Zvanut

Doctoral Dissertations

"For centuries it has been known that the application of heat to a clay or a clay body produces changes that make it an entirely different substance from the original raw clay. Ever since the earliest civilizations produced crude building brick by baking formed clay bodies in the sun's rays, mankind has been speculating on the nature of the changes that convert soft, friable, plastic clays into hard, strong, non-plastic, rock-like masses. It has been only within the last two decades, however, that progress has been made in the solution of problems dealing with the resultant products in fired clay …


A Study And Application Of The Process Of Supergene Enrichment Of Silver Ores., Arthur C. Verling Jun 1936

A Study And Application Of The Process Of Supergene Enrichment Of Silver Ores., Arthur C. Verling

Bachelors Theses and Reports, 1928 - 1970

In many deposits of silver ores the grade of the ore de­creases considerably a few hundred feet below the surface. It is believed that in many cases the better ores owe their richness in part to the process of sulphide enrichment. It is recognized, however, that many rich silver ores are hypogene deposits that have been affected very little, if any, by processes of enrichment.


The Extraction Of Manganese From Manganese Flue Dust., John Raymond Moore May 1936

The Extraction Of Manganese From Manganese Flue Dust., John Raymond Moore

Bachelors Theses and Reports, 1928 - 1970

It is estimated that 90 to 95% of the world’s consumption of manganese is used in the steel industry in the form of either ferromanganese or spiegeleisen. The remainder is used in the form of either salts or oxides, chloride, dioxide and monoxide.


A Study Of The Effect Of Oxygen On The Rate Of Dissolution Of Gold In Cyanide Solutions., John A. Cook May 1936

A Study Of The Effect Of Oxygen On The Rate Of Dissolution Of Gold In Cyanide Solutions., John A. Cook

Bachelors Theses and Reports, 1928 - 1970

The accepted chemical reactions in the dissolution of gold by cyanide solutions require the presence of gold, cyanide, water, and oxygen. The importance of dissolved oxygen in cyanide solutions as a factor is recognized by those familiar with cyanidation. Manufacturers of cyanidation equipment realize the necessity of oxygen, as shown by the appliances they have developed which are attached to the agitators in order to saturate the cyanide solutions with air.