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Full-Text Articles in Engineering

The Age Hardening Of Silver With Copper-Silicide, Joseph Edward Shaw May 1939

The Age Hardening Of Silver With Copper-Silicide, Joseph Edward Shaw

Bachelors Theses and Reports, 1928 - 1970

The successful application of the phenomenon of pre­cipitation hardening to aluminum and copper has indicated the possibility of hardening all metals in the same way. The phenomenon of age hardening was discoveredin 1911, and since that time much research has been car­ried on in all parts of the world on various alloy sys­tems.

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Structure Of Eutectics, Dilip K. Das May 1939

Structure Of Eutectics, Dilip K. Das

Bachelors Theses and Reports, 1928 - 1970

The present paper is a result of work done on the study of structures of eutectics of a certain eutectic-forming binary systems. In this research work no systems with intermetallic compounds have been studied.

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Investigation Of A Method For Extraction Of Indium From Zinc Flue Dust., Harold L. Tanner May 1939

Investigation Of A Method For Extraction Of Indium From Zinc Flue Dust., Harold L. Tanner

Bachelors Theses and Reports, 1928 - 1970

In metallurgical practice today some of the relatively rare metal Indium is recovered as a by-product from the ores of other metals. Indium is a soft, silvery—white metal belonging to the third group of the periodic classification. It is situated just above tin in the electrochemical series.

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A Study Of Solders, John D. Prater May 1939

A Study Of Solders, John D. Prater

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to furnish a qualitative method of comparing the degree of wetting of various solders upon different plate metals when several fluxes are used.

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The Pre-Jurassic Surface Of Montana., G. Fay May 1939

The Pre-Jurassic Surface Of Montana., G. Fay

Bachelors Theses and Reports, 1928 - 1970

It has long been known that, prior to the deposition of Jurassic sediments, Montana was subjected to an intensive period of erosion. Mention of this may be found in numerous reports, especially those dealing with western Montana.

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Electrolytic Manganese, George T. Derana May 1939

Electrolytic Manganese, George T. Derana

Bachelors Theses and Reports, 1928 - 1970

The production of metallic manganese by electrolysis is of potential value for the recovery of this strategic metal from domestic deposits. These deposits are largely unsuitable for the production of ferromanganese, but they are amenable to low-cost leaching processes.

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Igneous Rocks Of The Jardine And Crevasse Mountain Mining Districts., Ray E. Gilbert May 1939

Igneous Rocks Of The Jardine And Crevasse Mountain Mining Districts., Ray E. Gilbert

Bachelors Theses and Reports, 1928 - 1970

It is surprising to learn that so large a variety of igneous rocks is present in the Jardine and Crevasse Mountain mining districts, a region that is generally thought of as consisting principally of schists.

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The Age Hardening Of Copper With Manganese Silicide., Gordon A. Davis May 1939

The Age Hardening Of Copper With Manganese Silicide., Gordon A. Davis

Bachelors Theses and Reports, 1928 - 1970

The increase in hardness is attributed to the manganese silicide being precipitated from solid solution and deposited between crystal planes. The subsequent softening which occurs on prolonging the period of reheating is believed to be due to an agglomeration of the dispersed hardening agent.

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Geology Of The Golden Sunlight Mine And Vicinity, Roy H. Earhart May 1939

Geology Of The Golden Sunlight Mine And Vicinity, Roy H. Earhart

Bachelors Theses and Reports, 1928 - 1970

The Golden Sunlight Mine is in the northern part of the Cardwell mining district on the eastern slope of a small range that rises by a series of benches to an elevation of 7,200 at a point five miles east of the town of Whitehall in Jefferson County.

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Powder Metallurgy, Cecil R. Waldron May 1939

Powder Metallurgy, Cecil R. Waldron

Bachelors Theses and Reports, 1928 - 1970

The metal powders may be produced in a number of different ways. In metals where the intercrystalline material is brittle enough, they may be ground in a ball mill or eddy mill. The fineness of such a powder is more or less controlled by the grain size of the original metal.

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Geology Of A Portion Of The Bull Mountain Range Jefferson County, Montana, Thomas A. Greene Jan 1939

Geology Of A Portion Of The Bull Mountain Range Jefferson County, Montana, Thomas A. Greene

Bachelors Theses and Reports, 1928 - 1970

Work was first done on a known section, the south Boulder Section, in order to familiarize the student with the formations. Most of the area was mapped by plane table and telescopic alidade, general features being surveyed by automobile traverse and a pacing traverse.

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A Report Of The Geology Of The Golden Sunlight Mining District, Roy A. Mccready Jan 1939

A Report Of The Geology Of The Golden Sunlight Mining District, Roy A. Mccready

Bachelors Theses and Reports, 1928 - 1970

This paper is a report of a geological survey made of an area of approximately fifty square miles lying Northeast of Whitehall, Montana, in the region of the Golden Sun­light Mine. The survey was made by a field party consisting of twenty-three members of the senior class of the Montana School of Mines.

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The Construction Of Cofferdams Dam No. 26, Alton, Illinois, Arthur James Williams Jan 1939

The Construction Of Cofferdams Dam No. 26, Alton, Illinois, Arthur James Williams

Professional Degree Theses

"This report is intended to serve as a record of the procedure followed by the Engineering Construction Corporation in the construction and removal of the three cofferdams used during the construction of the Alton Dam with resulting problems, progress and costs"--Introduction, page 1.

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Organization Of Geophysical Parties For Foreign Exploration, Charles Howard Dresbach Jan 1939

Organization Of Geophysical Parties For Foreign Exploration, Charles Howard Dresbach

Professional Degree Theses

"Special conditions encountered in much foreign work make it necessary to consider many factors which are not encountered in domestic programs of geophysical exploration for oil. Although extremely difficult working conditions are frequently met in domestic operations by company and contract crews, the large store of past experience, the availability of fresh supplies, replacement or new equipment, and the proximity of the helpful home office make their surmountal more or less a matter of routine. Contrariwise, foreign operations are frequently conducted under much more difficult conditions, supplies and equipment can be secured only after long and costly delays, and the …

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Malaria Control Engineering On The Pickwick Reservoir, Cornelius Wolfram Kruse Jan 1939

Malaria Control Engineering On The Pickwick Reservoir, Cornelius Wolfram Kruse

Professional Degree Theses

"During the past year in an area extending south of a line between Norfolk, Virginia and St. Louis, Missouri, it has been estimated that about 10,000 deaths and staggering economic losses were caused by malaria fever...Since the recent inauguration of river development projects on the various streams in the so-called "malaria belt" of our country, malaria control methods on impounded waters have been of increasing concern to the health workers of the South...Mosquito control on impounded waters must be constructed into the dam design and requires a careful program of reservoir preparation or conditioning of the body of water so …

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The Management Of Mobile Loading Units In Mines Working In Number V And Vi Seams Of Illinois And Indiana, Kirk Vern Cammack Jan 1939

The Management Of Mobile Loading Units In Mines Working In Number V And Vi Seams Of Illinois And Indiana, Kirk Vern Cammack

Professional Degree Theses

"The knowledge and skill a face boss must have today is far beyond that required of even a mine foreman in hand-loading days. the care of material, the direction of the working force, the care and maintenance of equipment, the provisions for the safety of the men: all these are problems requiring the best of a boss' efforts. Because of these factors, the maintenance of a constant tonnage today rests almost directly on the section foreman. With this in mind, the following material has been prepared from the viewpoint of the face boss rather than from that of a superintendent …

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Vocational Training Of High School Students In Electricity, Harry Fredrick Kirkpatrick Jan 1939

Vocational Training Of High School Students In Electricity, Harry Fredrick Kirkpatrick

Professional Degree Theses

"At various intervals during the past five years I have had to justify my training program, not only to others but also to myself. After careful study and thought I am convinced that the objectives or purposes of the training program can be classified under four major headings: 1. Intelligent Self Direction... 2. Social Adjustment... 3. Work Habits... 4. Knowledge and Skills"--Part I, page 3-4.

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Some Effects Of Geology On The Relation Between Rainfall And Run-Off, James Smythe Reger Jan 1939

Some Effects Of Geology On The Relation Between Rainfall And Run-Off, James Smythe Reger

Professional Degree Theses

"For the past five years, the writer has been engaged either directly or indirectly in the investigation of water supplies. Studies and observations made in Texas, Oklahoma, Colorado, and New Mexico, have brought to his attention the importance of geology to hydrology. This is especially true in reference to the relation between rainfall and run-off. In all texts and other publications relating to hydrology, the importance of geology to the subject is hardly more than mentioned. In the absence of actual stream flow records, many engineers resort to either the "direct comparative method", or the "rainfall percentage method", in estimating …

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Construction Of A Concentrating Plant In The Waco Area Of The Tri-State District, William Henry Backer Jan 1939

Construction Of A Concentrating Plant In The Waco Area Of The Tri-State District, William Henry Backer

Professional Degree Theses

"Company: St. Louis Smelting and Refining Company...The fee is some five hundred acres of mining land is owned by the company, and an additional two hundred acres is held under a mining lease. Drilling had proved the ore to occur in a dolomitic horizon and to contain from 3 to 12 per cent zinc and small quantities of lead. Early in 1930, some thought was given by the officials of the company to the erection of a concentrator to mill the ore from this acreage. During the ensuing months a basic flow sheet and type of structure were tentatively approved, …

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Rural Distribution Line Protection, William Henry Rollman Jan 1939

Rural Distribution Line Protection, William Henry Rollman

Professional Degree Theses

"Considerable attention has been given the problem of providing low load density rural territory with electric service. In order that such supply may be economically justifiable, distribution system construction and operating costs must be considerably lower than that prevailing in urban or other territory having better load factors. It is the distribution engineer's problem to design, construct, operate and maintain a distribution system to furnish adequate and economical electric service to this low load density rural territory. In general, the rural line involves not only the circuit itself, but also the station equipment including transformers and protective devices for both …

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The Design And Equipment Of A Model Coal Mine For The Union Pacific Coal Company, Superior, Wyoming, William Thomas Sharp Jan 1939

The Design And Equipment Of A Model Coal Mine For The Union Pacific Coal Company, Superior, Wyoming, William Thomas Sharp

Professional Degree Theses

"In order to replace several mines in the Superior field that are near completion, the Union Pacific Coal Company have opened up the D. O. Clark Mine at Superior, Sweetwater County, Wyoming. They first contemplated opening up the individual seams from the out-croppings. This would have necessitated moving the present camp of Superior several miles west of the present site and building several miles of additional railroad. This plan was abandoned because of the burdensome cost. Then the idea was conceived of driving rock slopes down against the pitch of the various seams. By doing so, they could locate the …

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Effects Of Zirconium Compounds On A Bright Glaze, Stuart Dods Jan 1939

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 …

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Reopening An Abandoned Tri-State Zinc Mine - Waco, Missouri, Edgar Carroll Long Jan 1939

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 …

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A Process For Making Refractory Insulating Brick, Albert Lloyd Tetley Jan 1939

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. …

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South Moccasin Kaolin Deposit, Walter Everly Jan 1939

South Moccasin Kaolin Deposit, Walter Everly

Bachelors Theses and Reports, 1928 - 1970

Kaolin has never been considered an important economic mineral in Montana. Deposits of Kaolin in this state are not described in the literature and apparently very few deposits have been found.

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Coordination Of Transportation Systems Of The United States, Herman Blickensderfer Jan 1939

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 …

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Design Study Of A Three Span Continuous Tied-Arch Bridge, George Perry Steen Jan 1939

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 …

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Ethyl Cellulose Modified Exterior House Paints., Hugo Louis Schaefer Jan 1939

Ethyl Cellulose Modified Exterior House Paints., Hugo Louis Schaefer

Electronic Theses and Dissertations

No abstract provided.

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An Investigation Of Methods For Quantitative Spectrographic Analysis., Frederick Bertram Johnston Jan 1939

An Investigation Of Methods For Quantitative Spectrographic Analysis., Frederick Bertram Johnston

Electronic Theses and Dissertations

No abstract provided.

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Factors Affecting The Bronzing Of Prussian Blue Pigments., Nathan William Muller Jan 1939

Factors Affecting The Bronzing Of Prussian Blue Pigments., Nathan William Muller

Electronic Theses and Dissertations

No abstract provided.

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