Engineering Commons^™

Test 211: Mccormick-Deering Model T-40 "Tractractor", Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …

Test 208: Caterpiller Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

The Solubility Of Calcium Sulfate In Sodium Chloride Solutions, Edward Walter Mockobey

Masters Theses

"The purpose of this investigation was to determine the effect of sodium chloride on the solubility of calcium sulfate, and also, if possible, the effect of sodium chloride on the transition temperature for gypsum and anhydrite"--Purpose of the Investigation, page 4.

A Relationship Between The Mole Fractions And The Absolute Viscosities Of Blended Lubricating Oils, Ernest Reginald Epperson

Masters Theses

"The viscosity of binary liquid mixtures has been a subject of much investigation, but most of the work has been done with mixtures of substances other than lubricating oils. Lubricating engineers have found viscosity to be the most important property of a good lubricant, though up to the present time no one has succeeded in deducing a satisfactory expression by which the viscosity of a blended lubricant may be calculated from a knowledge of the physical properties of its components. This investigation has been an attempt to find a relationship between the absolute viscosity of a blended lubricating oil and …

Stress Investigation And Design Methods For Composite Beams Consisting Of Concrete Slabs On Steel I-Beams, Hjalmer T. Person

Electronic Theses and Dissertations

The term, reinforced concrete, as generally used, is applied to that type of construction in which steel rods are imbedded in concrete members. In these members the steel and concrete are considered to act as a unit and both are assumed to be effective in developing the resisting moment of the beam.

Preliminary Construction Of A Photo-Electric Cell Concentrator, Stanley S. Williams

Bachelors Theses and Reports, 1928 - 1970

The separation of the valuable portion from the waste portion of an ore is an individual problem for every ore. However, the various methods for accomplishing this end, more or less classify themselves by the physical properties of the constituents of the ore. Most of the properties of minerals have been utilized in some way or other to affect the separation of the valuable from the invaluable parts. Practically nothing has been done so far with color and luster to attain this purpose.

It is believed that the photo—electric cell could also be used in concentrating a certain class of …

A Study Of Washing Machines, Edna B. Snyder, Morton P. Brunig

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

The purpose of this investigation was to study the performance and constructional features of various types of washing machines. The machines studied were of four types, classified on the basis of mechanical construction. The types were dolly, gyrator, cylinder, and vacuum. Eight machines were studied, four of the gyrator type, two of the dolly type, one of the cylinder type, and one of the vacuum type. The material reported in this bulletin includes the following: (1) cleansing action of various washing machines and relation of cleanness of fabric to length of washing period, temperature of water, and size of load; …

The Comprehensive City Plan Of Jacksonville, Florida, George W. Simons Jr.

City and Regional Planning -- Florida

Jacksonville, Florida

Comprehensive city plan of Jacksonville, Florida. Prepared at the direction of the City Commission of the city of Jacksonville under the guidance and supervision of the City Planning Advisory Board by George W. Simons, Jr. Jacksonville, Fla. : Simons, 1931. Includes Supplement no. 1, Zoning map...of Jacksonville, Florida. Map of Jacksonville, Florida and vicinity...1928. (Maps in oversize map box 19). PALMM.

Road And Bridge Department And Jacksonville - St. Johns River (Toll) Bridge, Board Of County Commissioners Of Duval County, Florida

Books

A report by the Board of County Commissioners of Duval County Florida issued January 20, 1931, it includes statistics for roads: fund expenditures, maintenance costs, construction costs, maintenance cost of convicts, building costs, cost of shell and bonded indebtedness. It also includes statistics for the bridges and Toll bridge including expenditures, bonds, financial statements, bridge permits and toll permits. Arthur N. Sollee Collection - M84-1 Box 14 fold. 65b. PALMM

Georgia Kaolin As The China Clay Constituent In Floor And Wall Tile Bodies, Alfred Arthur Mitchell

Bachelors Theses

"The replacement of the China Clay content in vitreous floor tile and porous wall tile bodies wholly by Georgia sedimentary kaolin would reduce the cost of these bodies being used in our floor and wall tile plants at present. This plastic kaolin is available in large quantities in the State of George, covering an area of about 7500 square miles. It is the intention of this work to substitute this American Clay for the more costly imported English China Clay now being used"--Introduction, page 1.

The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Variation In Grog Size, Henry Rickel Herron

Bachelors Theses

"In the formation of dry pressed ware, the transmission of pressure is of vital importance to the quality and character of the finished product as regards the resistance to spalling, load at high temperatures, slag action, abrasion and other physical properties. Furthermore, the transmission of pressure is a limiting factor as regards the size and irregularity of shape of a product manufactured by the dry press process"--Introduction, page 1.

Size And Shape Of Clay Grains As Affected By Various Methods Of Grinding, Henry William Meyer

Bachelors Theses

"It is a common belief among those persons manufacturing dry pressed brick that the shape of grain of the clay used for this purpose would materially affect the physical properties of the resultant product. Some believe that clays, dry pan-ground, give a better product than clays disintegrated mechanically or passed through rolls. In some recent dry press investigations it was found that some milling methods gave an advantage over other methods, in the matter of pressure transmission. Due to this, a possible cause for the advantage was attributed to the shape of the grains resulting from the various methods of …

Design Of A 2 Hp Repulsion Start Induction Motor, Joseph Worley

Professional Degree Theses

"The Repulsion Start Induction motor comprises a wound field or stator of laminated structure and a wound armature or rotor whose coils are connected to a commutator upon which brushes bear and function during the starting period. This motor operates as a repulsion motor during the starting period and at a predetermined speed the short circuiting device actuates and short circuits the commutator. The motor then operates as an induction or squirrel cage type. The starting torque of this type of motor is exceptionally high, generally 300% to 400% of full load torque. Consequently this type of motor is regarded …

Memorandum: Current Recording And Reporting Of Mortality And Salvage Data, Buildings, C.B. Central Office Equipment, Multiple Private Branch Exchanges, Wilbur Elihu Sheldon

Professional Degree Theses

"The purpose of this memorandum is to describe the methods and forms to be used in recording currently and reporting annually actual additions and retirements of Buildings, Common Battery Central Office Telephone Equipment, and Multiple Private Branch Exchanges, together with the making of certain periodic estimates of future additions and retirements, final dates of retirement, and probable net salvage at final retirement. All of these data are used in connection with the determination of depreciation rates for the classes of plant mentioned"--Section I. General, page 4.

The Effect Of Small Amounts Of Chrome Ore On Dry Press Diaspore Refractories, Allen John Reid

Bachelors Theses

"The term "Diaspore" as used in this paper will be used to mean the diaspore clay from which refractory bodies are made. The pure mineral Diaspore (Al₂O₃ . H₂O) has an Al₂O₃ content of 85%, while the best grades of diaspore clay run from 76% to 79% diaspore. Diaspore clay consists of a varying percentage of diaspore, ranging from 60% to 79%, and the remaining percentage as clay. The most objectionable impurities which occure sic in diaspore clay are alkalies. The chief source of diaspore is the central part of Missouri. It occurs in pot hole formations accompanied by "flint" …

Proposed Method Of Ventilating The Frood Mine, Herman Jacob Mutz

Professional Degree Theses

"The Frood Mine lies about two and one half miles north of the City of Sudbury, Ontario. The Frood deposit was among the first discoveries in the district, but was not considered as a very important deposit until 1925, when a deep drilling campaign disclosed higher grade ore with depth"--page 3.

Technical Methods Of Analysis For Mill Products, Daniel Elijah Huffman

Professional Degree Theses

"In mining and milling operations it is necessary that the assays be known as soon as possible, also that these results are more accurate than the sampling or the operation that produced the samples. This means that both speed and accuracy must be considered when selecting a method for the analysis of samples"--Technical Methods of Analysis, page 1.

Chemical Control -- Influence On Manufacture And Quality Of Cement, Joseph Owen Hunt

Professional Degree Theses

"Definition:- Portland cement may be defined as the product obtained by finely pulverizing clinker produced by calcining to incipient fusion an intimate and properly proportioned mixture of argillaceous and calcareous materials with no additions subsequent to calcination excepting water and calcined or uncalcined gypsum. While a review of Portland cement analysis would show a wide variation in chemical composition, it must not be supposed that such latitude in proportioning the raw material really exists. If the resulting Portland cement is to be sound, normal setting, and of good strength it is imperative that the raw materials shall be correctly proportioned …

Some Of The Difficulties Encountered In The Construction Of A Highway Subway Or Underpass, Lawrence Halley Sanderson

Professional Degree Theses

"The project from which the subject for this work is taken is located in Section 28, T 13 N, R 11 W, of the third P. M., Scott County, Illinois, within the village limits of Manchester, in the north east part of the town. (Sheet No. 1 of accompanying plans) It is a grade separation between the Chicago and Alton Railway and Route No. 3 of the Illinois system of Highways"--Page 6.

The Commercial Value Of High Iron And High Alkalie Diaspore, William Lucius Mccracken

Bachelors Theses

"In a recent survey of the refractory field particularly regarding high iron and high alkali diaspore it was suggested that perhaps some of these impure clays had the proper flux content to make them a body of stable volume in the initial firing operation. At present there is an apparant sic lack of information regarding the commercial value of these impure diaspores. One of the great problems in the use of diaspore refractories is the lack of stability of volume while in service subjected to severe heat treatments of varying degrees"--page 3.

The Effect Of Bentonite On The Transmission Of Pressure In Green Dry Press Blocks, Charles William Mccaw

Bachelors Theses

"The object in view in this work was to study the effect of the addition of bentonite on the pressure transmission of dry pressed ware, consisting of plastic fire clay. It was hoped that the bentonite would improve the transmission of the pressure to a noteable extent, forming a stronger, more evenly pressed block than has before been accounted for. This would facilitate the dry pressing of block that tended to crumble and disrupt from excessive pressure, allowing the ware to be pressed harder, and therefore making a more dense product"--Reasons For Investigation, page 4-5.

Pressure Transmission In Clays Affected By Time Of Pressure Application, Robert Edward Lee

Bachelors Theses

"Experienced dry-press operators have long known that when they slow down their presses, to the proper speed they are able to exert more pressure on a wetter mix with out pressure cracks becoming apparent. When a clay mix is compressed in a dry-press there is a gradation of the pressure exerted, from the rams to the center, causing in some cases a soft centered brick. "Shelly brick", are undersirable sic because they do not have uniform physical properties through out. This weakens their structure, due to unequal stresses developed in drying and fireing sic. The defective structure of dry-pressed brick …

Disintegration Of Green Missouri Fire Clay Bodies At Low Temperatures, Wilbur Brooks Schofield

Bachelors Theses

"Several years ago in the Ceramics Lab. of the Missouri School of Mines some A. P. Green Ozark Clay test pieces were left in a drier for a period of about seven months at a constant temperature of 110C. At the end of this period it was noticed that these specimens had disintegrated and crumpled down to a powdered mass. The object of this experiment was to repeat the former test and see if the clay would disintegrate and if so why. We also wished to find if by drying at higher temperatures for a shorter length of time would …

The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Variation In Grog Size, Stanley John Tompach

Bachelors Theses

"In the formation of dry pressed ware, the transmission of pressure is of vital importance to the quality and character of the finished product as regards the resistance to spalling, load at high temperatures, slag action, abrasion and other physical properties. Furthermore, the transmission of pressure is a limiting factor as regards the size and irregularity of shape of a product manufactured by the dry press process. Prior to the time of this investigation several companies have succeeded in producing ware up to six (6) inches in depth; but an increase over six inches has resulted, in every case, in …

A Summary Of Operations And Practice At Shenandoah-Dives, Howard Histed

Professional Degree Theses

"The property of the Shenandoah-Dives Mining Company is located in the Animas Mining District, San Juan County, Colorado. The Mine is located on King Solomon Mountain, four miles east and one mile south of Silverton. Silverton is on a branch line of the narrow guage Denver & Rio Grande Western Railway, on which the nearest smelter is located at Durango, a distance of about fifty miles. Included in this report is a claim map showing all the claims and their relative locations"--Location of the Property, page 1.

Japan, Van Hoose Smith

Professional Degree Theses

"This ore is mined from a quartz vein which is refined by small seams of graphitic clay material, and the walls of the vein consist of a sort of graphitic shaley material. The above graphitic materials break down under treatment into a rather peculiar clay which was called primary colloidal slime. The milling process in use consists of stamp milling followed by the separation into sand and primary slime in Dorr Duplex Classifiers. The primary slime overflow from these classifiers, which is all practically thru 220 mesh, is thickened and treated by flotation. Normally and with a good supply of …

Gas Analysis By Measurement Of The Thermal Conductivity, Bertie Lee Browning

Professional Degree Theses

"Types of gas analysis. Methods for the analysis of gases may be divided into two general classes, physical and chemical. In chemical methods, a constituent of the gas mixture undergoes chemical reaction and the amount of the constituent is determined by change in volume or by supplementary chemical methods such as titration. The physical methods of analysis differ in that no chemical change takes place in the gas. Instead, a determination is made of some physical property which is related to the composition of the gas mixture. Some of the physical properties which have been used for purposes of analysis …

Some Early Geologists And Their Work In Montana, John E. Blixt

Bachelors Theses and Reports, 1928 - 1970

This paper marks an increased refinement and more detailed accuracy in the description of the geological features of the state. It includes the recent studies of mineral deposits, of oil structures, of the formations of bedded rocks and their included fossils, carried on both by the Federal and State governments and by various interested private persons, such as the mining companies. It is within this period that the Federal Government encouraged the U. S. Geological Survey in the publication of monographs on the National Parks, papers of great popular interest and educational value making these beautiful regions comprehensible in their …

Age Relationships Of Ore Deposits Of Southwestern Montana (A Microscopic Study), Charles R. Trueworthy

Bachelors Theses and Reports, 1928 - 1970

Although considerable work has been undertaken by some prominent geologists, the best known of which is that of Paul Billingsley and J. A. Grimes', in investigating the ore deposits of the Boulder Batholith and surrounding area, there has not been any complete microscopic investigation of these deposits, as a whole, published in the literature. With this in mind it was suggested to the writer by Professor Paul A. Schafer, of the Montana School of Mines, that a microscopic study of the ores of this region would be a worthwhile geologic problem.

It was thought that the mineral association and the …

A Qualitative Study Of Arsine And Stibine Reactivity Toward Inorganic Salts In Certain Solvents, John Edgar Antener

Masters Theses

"The effects of arsine and stibine on some substances have been investigated by various workers and recorded without any attempt at systematic classification. In this work a more comprehensive study of the precipitating effect of arsine and stibine on common inorganic salts in certain solvents, namely, water, ethyl alcohol, ethyl ether, acetone, carbon disulphide, carbon tetrachloride, chloroform, and benzene has been made, with an attempt at reactivity classification"--Introduction, page 1.