Engineering Commons^™

Effects Of Zirconium Compounds On A Bright Glaze, Stuart Dods

Bachelors Theses

"The standard method for producing opacity and to some extend sic mattness in a glaze has always been the use of small amounts of tin oxide. This oxide, however, is very expensive and tends to fluccuate sic in price over a wide range due to world market conditions. The ceramic industry, therefore, has been searching for some substitutes for the tin oxide with some success. At the present time zinc oxide, antimony oxide, and zirconium oxide are used with varying degrees of success as opacifiers. Zirconium oxide and compounds are less soluble than the other oxides previously used. Therefore, it …

Reopening An Abandoned Tri-State Zinc Mine - Waco, Missouri, Edgar Carroll Long

Professional Degree Theses

"Early in the year of 1937, the company employing the writer decided to reopen an old mining property located in Kansas, one and one-quarter miles west of Waco, Missouri. This property is known as the Grasselli No. 1, the lease of which had been acquired a short time prior to the depression of 1930. This property had been extensively mined on upper levels (195-foot, 176-foot, and 150-foot) by former operators and was a noteworthy producer of sphalerite. It was worked from the time of the beginning of the World War until about 1928. The lowest level, 285-foot, had hardly been …

A Process For Making Refractory Insulating Brick, Albert Lloyd Tetley

Bachelors Theses

"The object of this study was to investigate the fundamental principles of producing an insulating brick by making the pore structure of air bubbles entrapped in a clay slip. Since a clay water mixture or any material containing entrapped air will loose this air when placed under vacuum, it is thought that placing the clay slips under a pressure would cause a considerable pore structure in the slip when the pressure is released. In the common method of making insulting brick, the fired brick must be ground to size as they cannot be molded to a definite size and shape. …

Coordination Of Transportation Systems Of The United States, Herman Blickensderfer

Masters Theses

"To any thinking man it must be apparent that the railroads are of vital necessity to the country at large as they can more cheaply move a host of the heavy commodities than can the trucks, and of course the waterways do not and cannot reach every part of the vast territory that must be served. On the other hand it is equally apparent that many of the other types of traffic can be handled more readily and cheaply by truck than by rail. This would lead one to conclude that some way should be found to give to each …

Design Study Of A Three Span Continuous Tied-Arch Bridge, George Perry Steen

Masters Theses

"In this study of the continuous tied-arch bridge, having one main span and two equal side-spans, the following items are endeavored: (1) To set up the total internal work equations and to find the values of the unknown forces or redundants. (2) To compute to maximum moments for design and to complete the design of the super-structure for one bridge. Details, such as the gusset plates, rivets, connection angles, etc., are not designed; the effect of such being allowed in the design for dead load as a certain per cent for details. (3) To set up hypothetical conditions for other …

The Foundations Of Lock And Dam No. 26 - Alton, Illinois, John Joseph Livingston

Professional Degree Theses

"The present Upper Mississippi River Canalization Program provides for a channel depth of nine feet, with suitable widths, at low water, in the Upper Mississippi River between the Missouri River and Minneapolis, Minnesota, and was adopted by the River and Harbor Act of July 3, 1930, as amended by Public Resolution No. 10, Seventy-second Congress, First Session, approved February 24, 1932. The establishment of this nine-foot channel requires the construction of twenty-six dams and accompanying locks - two of which were already constructed - at selected points throughout the distance between Minneapolis and the mouth of the Missouri River...This series …

Application Of Small-Scale, Movable-Bed River Models To Channel Improvement Studies Of The Middle Mississippi River, Eugene H. Woodman

Professional Degree Theses

"This paper deals primarily with the use of small-scale models in the study of plans for improving the channel for navigation in several reaches of the Middle Mississippi River. However, it was considered expedient to include a discussion of hydraulic model experimentation in general before dealing with specific cases, in order that the reader might obtain the greatest possible satisfaction from the discussion.

The first part of this paper includes: a discussion of the theory of models, wherein the value and utility of models are demonstrated; the application of models to hydraulic problems, including the requirements for a model to …

The Latouche Mining Method As Used At The Alaska Juneau Gold Mine, Willard Alexander Gallemore

Professional Degree Theses

"The Latouche Mining Method has been used at the Alaska Juneau Gold Mining Company only since 1933, and is used in that part of the mine below the main tramming level. It consists of a series of radiating "long holes" (21 feet) drilled from stope raises, over the back of the stope. These holes break the rock into the stopes, from where it goes through bulldoze chambers to oreways leading to chutes on the No. 10 level. On this level, the ore is drawn into Granby Cars, trammed to the Main Shaft, and hoisted to No. 4 level. On this …

Copper Mining In South America, Charles Kenneth Rose

Professional Degree Theses

"The Morococha district is situated in the Andes of Central Peru, Department of Junin, four miles east of the crest of the Western Cordillera, which there forms the Continental Divide. The town of Morococha is at an elevation of 14,800 feet and is connected by rail with Callao, the port of Lima, ninety miles to the west, and with La Oroya, the smelting center, thirteen miles to the east. The Peruvian Central Railway ascends from Lima along the valley of the Rio Rimac to Ticlio (15,665 feet) where it tunnels through the Divide and descends the Yauli Valley to La …

How South-West Wisconsin Tailing Piles Can Be Worked At A Profit, Gerald Henry Pett

Professional Degree Theses

"It was not until the Flotation Process was introduced in this S.W. Wisconsin zinc district that the writer was convinced that some of the tailing piles here could be worked at a profit. In 1928, the Badger Zinc Company built a 120 ton Flotation Plant about two miles north-east of Linden. It was after the second visit to the plant that the writer learned the above company was making a profit of a 5% zinc ore with very little lead and with a low market price for the finished product, namely $30.00 per ton for a 60% zinc concentrate...the body …

Sinking And Equipping Inclined Shafts Of More Than 60 Degree Dip, Wilford Stillman Wright

Professional Degree Theses

"The advisability of putting down an inclined shaft in preference to the vertical type should be carefully considered before a definite choice is made. One, of course, presupposes the existence of a dipping ore body that is to be prospected or developed for subsequent mining. Unless a vein has been previously developed there is no certainty that it maintains the same degree of pitch for any great distance below surfaces. If straight, the proposed inclined shaft may depart considerably from the downward course of the vein with the result, that, at least some of the anticipated advantages of the shaft …

Superstructure Costs Of Short Span Self-Anchored Suspension Bridges, David J. Peery

Professional Degree Theses

"Complete designs and estimates for three self-anchored highway suspension bridges are made in this paper. The span lengths investigated are commonly considered to be shorter than the economic limit for suspension bridges. Simple truss and cantilever bridges are usually considered the most economic types for these span lengths"--Synopsis, page 1.

Hydrography Of The Larger Springs Of The Ozark Region Of Missouri, Warwick Lewis Doll

Professional Degree Theses

"This thesis is based upon a study of the larger springs of the Ozark Region of Missouri and is designed to answer many requests for information about the large springs.

Special studies were made to determine the probable location and approximate area of the drainage areas of the large springs (previous writers have referred to the drainage areas as being “very large" or "enormous", apparently, without any very definite idea as to the extent or the drainage areas). The average run-off per square mile from the assumed drainage area, herein called the "spring factor", was determined for the largest springs. …

An Approach To County Planning - Miller County, Frederick William Hurd

Professional Degree Theses

"The purpose of this report is to present and discuss a proposed eight year state and county highway program as applicable to Miller County. Local needs for transportation service may be most readily and efficiently administered to on the county basis. The highway requirements of the state are now largely for local service roads and it is evident that a fair and just method of allocating this service must provide for the physical characteristics, economical status and local peculiarities of the area involved. We may therefore justly assume that the counties, the smallest political subdivisions in the state having direct …

Conveyor Mining In The Thin Vein Coal Fields At Excelsior, Arkansas, Bernard Degen Boyd

Professional Degree Theses

"From the results obtained after a year and a half of operation using the long face system of conveyor mining in our thin seam of coal, four decided advantages over the old system of room and pillar work with wide rooms have been proven: 1. Operations are concentrated in small sections, thereby permitting larger tonnages to be loaded. 2. One hundred per cent extraction of the vein is obtained (with the exception of main slope pillars) which prolongs the life of the mine. 3. The ventilation of this gaseous vein is simplified. 4. Production costs are reduced"--page 15.

Mercury In The Terlingua District Of Texas, William Woodhouse Kay

Professional Degree Theses

"Material for this paper was assembled during 1936 when the author, with an associate, studied the Terlingua District and did some actual prospecting and mining in various parts of this district. This paper endeavors to describe mercury mining in the Terlingua District of Texas generally. No attempt is made to treat any of the various aspects of this industry too technically as this is not the purpose of this paper"--Introduction, page iii.

A Comparison Of Methods For The Determination Of Iron In Clays And Related Ceramic Materials, Hoyt Gillum Thompson

Masters Theses

"Iron is always present in clay and ceramic products. This element has a definite effect upon the properties of substances containing it, hence it is important for the ceramist to know the exact amount of this element present in a ceramic material. Many methods have been devised for the precise determination of iron, both in large and small amounts. Of the many methods used, the American Society for Testing Materials has listed only two for the examination of clays, refractories, and similar material...However the amounts of iron for which these methods are most suitable are not given. Nor does the …

The Sorption Of Metallic Ions By Wood Pulp During Purification, Harold Edgar Boyd

Masters Theses

"The cost of producing cellulose acetate, and the difficulties attending its dissolving, plasticizing, and application to specific uses are problems which must be investigated before the ultimate commercial development of the material can be realized. The price of the cellulose used as raw material for acetylation is one of the primary factors influencing the cost of the finished product. At present, cotton linters constitutes the chief practical souce [sic] of acetate, being almost pure alpha-cellulose, and cheaper than staple cotton, our other source of high alpha-cellulose, Wood pulp is the only other material offering promise as a substitute for cotton, …

Laboratory Concentration Of A Lead-Zinc-Fluorspar Ore From Southern Illinois, Shiou-Chuan Sun

Masters Theses

"The purpose of this investigation was to ascertain the feasibility of preparing marketable products from a rather complex sulphide-fluorspar ore"--Object, page 2. "The ore was examined exhaustively by chemical, microscopic, and mineralogical methods of analysis. After a thorough knowledge of the physical characteristics of the ore had been obtained, flotation concentration tests were made to separate the sulfide minerals from the fluorspar and to attempt to prepare lead-zinc and fluorspar concentrates of marketable grade"--Scope of Work Done, page 2.

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

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

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

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

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

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

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

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

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.

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 …

Small Scale Mining Possibilities In Southeast Missouri, William Walbridge Weigel

Professional Degree Theses

"The disseminated lead ore bodies of St. Francois County in southeast Missouri are known for their enormous size and even grade over large areas. Several of these ore bodies are over a mile long by a quarter mile wide. They have been worked on a commensurate scale. The smallest mill in the district, at Bonne Terre, now treats 2,500 tons daily capacity. Each of these mills is supplied by a single ore hoisting shaft. The disseminated ore district of St. Francois County is bounded by the Big River-Bonne Terre fault on the north and west, by the Simms Mountain fault …