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The Nebraska Tractor Law And Rules For Official Tractor Tests, L. W. Chase, E. E. Brackett, O. W. Sjogren, C. K. Shedd

Nebraska Agricultural Experiment Station: Historical Circulars

The Nebraska Tractor Law, which became effective July 15, 1919, was enacted to encourage the manufacture and sale of improved types of tractors and to contribute to a more successful use of the tractor for farming. It was thought that the best method of accomplishing these objects would be to require a tractor of each model sold in the State to be tested at the State University and to have the results of these tests made public. These tests will give reliable information on the power, capacity and fuel consumption of each tractor and also some information on endurance. The …

Rules For Official Tractor Tests, Nebraska Tractor Test Lab, Agicultural Experiment Station

Nebraska Tractor Tests

The Nebraska Tractor Law known as House Roll 85, 37th session, which became effective July 15, 1919, was enacted to encourage the manufacture and sale of imporved types of tractors and to contribute to a more successful use of the tractor for farming.

It was thought that the best method of accomplishing these objects would be to require a tractor of each model sold in the State to be tested at the State University and to have the results of these tests made public. These tests will give reliable information on the power capacity and fuel consumtion of each tractor …

Metallurgical Results From Black Copper Smelting, Preston King Horner

Professional Degree Theses

No abstract provided.

The Roasting Of Zinc Ores In The Manufacture Of Sulphuric Acid By The Contact Process, Clarence Eugene Peterson

Professional Degree Theses

"The unprecedented demand for sulphuric acid of the higher strengths (98% and higher) in the manufacture of explosives, has stimulated the zinc smelters to increased efforts in the recovery of their Roaster gases in the form of Sulphuric Acid. The Lead-chamber process is unsuitable, however, in making "strong" acid and the smelters naturally turned to the contact mass or catalytic processes. In the roasting of zinc ores practically all of the sulphur is removed as sulphur dioxide, the disagreeable odor and unmistakable injury to surrounding localities, of which, first led to the adoption of sulphuric acid plants by most zinc …

On The Microscopic Determination Of Cadmium In Metallic Zinc, James Presley Gill

Professional Degree Theses

"A quick and accurate determination of Cadmium in Metallic Zinc by all ordinary chemical methods now in use, so far as the writer has been able to ascertain is at best only approximate. However, longer methods and very delicate ones for determining Cadmium are in use that are very accurate, but these methods are so long and so delicate that very few commercial laboratories care to use them. Now, it has been known for some time that Zinc and Cadmium do not form an alloy which when in the solid exist either as a solution or a compound. They do …

Rules For Tractor Demonstrations, Nebraska Tractor Test Lab

Nebraska Tractor Tests

The object of these rules, instructions and data is to make all tractor demonstrations of this kind comparable and of the greatest educational value. Anyone who has conducted tractor demonstrations in the past has realized the necessity of some standard rules to follow and those who afterwards have referred to the results, deplore the lack of uniformity in the demonstrations and the data. For those who have not had this experience will find that it is a great help to have satisfactory rules to follow.

The value of these demonstrations depends largely upon the accuracy of the data reported on …

Graphics And Its Application To The Progress And Cost Analyses Of A House Building Construction Company, Frank Lewis Leonard Wilson

Masters Theses

"In the graphical analyses of Stresses in Framed Structures, we study, by means of diagrams, the stability or equilibrium of structures and the relation between the external forces and the stresses created in the members of the frame. The principle involved is that we may represent any force both as to direction and intensity by a straight line, by considering the direction of the line to be identical with that of the force and adjusting its length according to any arbitrary unit adopted for the forces under consideration. By this means we can solve the stresses in framed structures with …

Father Of Test Law Explains It, Nebraska Tractor Test Lab

Nebraska Tractor Tests

Nebraska State Representative Wilmot F. Crozier of Osceola, Nebraska, who fathered and pushed the tractor bill through the Nebraska State Legislature. On September 19th, 1919, he tells why he formulated the law and his story to Implement & Trade Journal.

The Occurrence Of Oil And Gas In Osage County, Oklahoma, Donald Hewson Radcliffe

Professional Degree Theses

"Osage, the largest county in Oklahoma, is situated a little to the east of the north central part of the state. It consists of an area of approximately 2,350 square miles, or about a million and a half acres, extending from T. 20 N. to T. 29 N. and from R. 2 E. to R. 12 E. inclusive. As this country lies between some of the best oil producing areas of the State, as it is definitely known to be folded, and as the folds tested have proven that the chances of obtaining production on favorable "structure" in the Osage …

Electrolysis Of Neutral Solutions Of Znso₄, Knud Fabricius Hansen

Professional Degree Theses

"The purpose of the following experiments was to obtain informations concerning the character of the deposits, the efficiencey [sic], et al. in the electrolysis of neutral solutions of ZnSo₄"--Purpose, page 1.

Determination Of Critical Point Of Concentrating Tables On Arizona Copper Ore, J. C. Finagin Jr., W. C. Hogoboom

Professional Degree Theses

"In the concentration of an ore by means of concentrating tables, there is a critical point in sizing beyond which the valuable minerals can not be recovered. Theoretically, the lighter gangue is washed over the side of' the table and the heavier mineral, regardless of size, is recoverable at the end, these concentrates being graded from coarse to fine sizes up the slope of the table. In practice, however, the finer sizes of concentrates are found mixed with the middlings and tailings, as indicated by the arrows on the diagram of the concentrating table shown below. The problem is to …

Measurement Of Air Under High Pressure By Orifice Method, George E. Mellow

Bachelors Theses

"The measuring of compressed air, under high pressures, by means of observing the drop in pressure on passing thru an orifice, is in a new field of endeavor. The necessity of measuring compressed air, in order to handle it economically, is obvious. Hence, the importance of a simple device by which this may be done. A device, which may be duplicated at any time, at any place, with very little expense, and ordinary materials"--Introduction, page iii.

Some Tests On The Grinding Of Cement Clinker With A Hardinge Conical Ball Mill, Gilbert F. Metz

Professional Degree Theses

"The Hardinge Conical Mill is the invention of Mr. H.W. Hardinge and has been fully patented by him. It has been used successfully in the grinding of ores, limestone, phosphate rock, feldspar and talc. The purpose of the tests in this thesis was to determine the worth and adaptability of the Conical Mill for the preliminary grinding of cement clinker and to determine the relative merits of this type of grinder as compared to the roll type of grinder. The tests herein were performed under the direction of the writer assisted personally and through correspondence by Mr. H.W. Hardinge of …

Measuring Silage And Capacity Of Silos, L. W. Chase

Nebraska Agricultural Experiment Station: Historical Circulars

The condition of the corn at filling time, the rate of filling, and the length of time settling has taken place before measuring the depth of the silage, all tend to cause variations in the weight per cubic foot of the silage and in the tonnage that can be placed in a silo. The greatest variation comes when very green corn or very ripe corn is used, and because of this it is possible that a cubic foot of green silage, which may weigh fifty pounds, holds no more dry matter than a cubic foot of overripe silage which weighs …

The Design Of An Eight Story Reinforced Concrete Warehouse, Walter W. Genrich

Bachelors’ Theses

The sole purpose of submitting this thesis, was not so much in trying to design a ware-house of ideal construction, but to · acquaint myself more or -less with the use of the formulas, tables and graphs, used in such a design, and at the same time getting a general idea on how to go about it.

Efficiency Test Of An Ingeco Kerosene Engine, Andrew Keiding

Bachelors’ Theses

The object of this test was to increase if possible the efficiency of an Ingeco Kerosene Engine manufactured by the International Gas Engine Company of Milwaukee, the engine being rated as 12 Horse Power at 275 revolutions per minute. The increase in efficiency was to be produced by heating the fuel and by introducing the exhaust gases into the combustion chamber.

Lake Shore Developments, Albert Theodore Bleck

Bachelors’ Theses

Along the shore line of Lake Michigan are bluffs approximately fifty to sixty feet high above the level of the lake. With the exception of approximately two or three miles, where the ground elevation is not much above the lake level these bluffs are almost continuous along the shore. This low land extends from a short distance north of Wisconsin Street to a short distance south of the Illinois Steel Company's plant. The territory north of Wisconsin Street to the City Limits is almost entirely residential and, therefore, cannot be considered favorably as regards to the location of a mnufacturing …

Underground Haulage, T. Roderick Noon

Bachelors’ Theses

The object of this discussion is to determine which would be the most economical and efficient of two forms of haulage, namely, mule and storage battery locomotive, based upon an output of four hundred and fifty tons of cleancoal per day, of eight hours.

The Design And Construction Of A Power Transformer, James M. Johann, George P. Nugent

Bachelors’ Theses

Usually one coil of the transformer has many more turns of wire than the other, when the coil of few turns is the primary, the transformer takes a large current at a low potential and delivers a smaller current at high potential. This is called a step up transformer. When the coil of many turns is the primary the transformer takes small current at high potential and delivers greater current at lower potential. This type is called a step down transformer.

Pump Irrigation In Nebraska, E. E. Brackett, O. W. Sjogren

Nebraska Agricultural Experiment Station: Historical Circulars

Before one decides to install a pumping plant for irrigating purposes there are a good many factors that should be considered regarding the feasibility of the project and the construction of the plant. The material contained in this bulletin has been obtained from studying pumping plants in actual operation in this and other states and from experience gained while installing plants in this state.

Chemical Control Work In The N. K. Fairbanks Factories, John Whittlesey Bodman

Professional Degree Theses

"We propose to discuss in this thesis the organization of the N. K. Fairbank Company, particularly with reference to the duties of the Chemical Division, Operating Department in this organization. From a broad viewpoint, we believe that the particular organization by with the N. K. Fairbank Company secures application of its chemical ability to manufacturing operations as well as to special problems, is characteristic of a widespread movement taking place for recognition of the chemical engineer in industry. This is particularly true in those industries where manufacturing operations are based primarily upon practical applications of chemical principles"--Abstract, page 1.

Descriptive Study Of The Petroleum Refinery At MinatitláN, GermáN GarcíA Lozano

Professional Degree Theses

"In order to reduce as much as possible the cost of transportation of the crude oil to the refinery, the city of Minatitlán of Minatitlán County in the State of Veracruz was chosen as the most proper place for establishing the refinery it being in the center of the only oil fields which at that time possessed the "Eagle Mexican Petroleum Co."--page 1.

The Goltra Process Of Concentrating Iron Ores As Developed At Waukon, Iowa, Ernest Wander

Professional Degree Theses

"The more or less impure iron bearing mineral occurs mixed with a very tenacious clay, in which are also found chert, cretaceous quartz pebbles, pockets of sand, masses of pebbles and sand cemented by hydrous iron oxide, (which in some cases partly replaces the silica) and several varieties of fossils, such as crinoids etc. The impurities mentioned are often an integral part of the ore particles, and are present in varying quantities thruout [sic] the deposit. But, besides the foreign matter which the eye can discern, the apparently pure mineral contains a varying percentage of silica and alumina, (as well …

Some Typical Bridges For Logging Railroad Construction, Frederick Hauenstein

Professional Degree Theses

"In some of the pine regions of the Ozark Mountains, a considerable portion of the country is rolling and rough, comprising a succession of hills and hollows. The most efficient method of logging such a tract is obtained by locating the logging road so as to secure a down grade haul for the logs, with consequent up grade return for the empty cars. This necessitates locating the main line of the railroad along the principal creek, and then laying spurs up the different tributary creeks as they are met. Such a procedure requires much crossing and re-crossing of creeks and …

Concentration Of A Joplin Slime By Flotation, Earl Joseph Weimer, Walter Harry Freudenberg

Bachelors Theses

"Concentration of the Joplin slimes by means of flotation is a subject receiving considerable attention at the present time, due to high price of zinc. These slimes are the accumulation of the finer particles of the ore during the milling process, and their zinc content is well worth considering. The practice in the past has been to sluice these slimes into the tailing pond, as no economical method of saving the zinc had been employed. The object of our experiment was to economically extract from these slimes by flotation, a product of sufficient zinc content to be of commercial value"--Introduction, …

Practical Details Of Mine Surveying In Certain Mines Of Northern Mexico, Arturo C. Fernandez

Bachelors Theses

"The name of this thesis is suggestive of its character. The writer has endeavored to resent in a general way some of the most important details of mine surveying as he has found them in actual practice. For the sake of uniformity the engineering staff in which he worked prepared a set of instructions to be used by the engineers at the various mines. The methods and illustrations described in this paper have been adapted from these instructions and they afford a thorough foundation ready to receive the minor details best adapted to each particular mining district"--Foreword, page ii.

Simple Methods And Tables For Determining True Meridian, Howard Jones Teas

Bachelors Theses

"The ordinary methods of determining the true meridian by observation on either Polaris or the sun are so tedious to calculate that most surveyors and students dread making them. Observation on Polaris at either elongation or clumination sic require less calculation and are much simpler, but this simplicity is offset by the fact that they must be taken at an exact instant. If a cloud crosses the sky at the time, the surveyor has to wait until the next night. then again the observer must know the date, exact longitude and latitude and correct time for making the observation, and …

Selective Concentration Of A Complex Ore By Flotation, Paul Frederick Pape, Ralph Dale

Bachelors Theses

"The problem of the Mining Engineer and Metallurgical Engineer who wishes to treat the slimes and fine sands of a complex ore is the recovery and separation of minerals so as to render a subsequent treatment of any mineral profitable. The minerals must be separated into groups which can be treated by different processes, because a combination of numerous minerals is extremely undesirable at the smelting plant. In a lead ore the presence of zinc often depletes its value to such an extent that it is unprofitable to treat it; likewise with other minerals and ores. Many systems of selective …

Concentration Of Ores By Flotation, John Gay Reilly, Frank Stillmann Elfred

Bachelors Theses

"Flotation is a new step in the separation of valuable minerals from gangue. This process has only been in commercial use for about six years. There has been several theories advances as to how the ore is concentrated, and the theory that is now usually accepted is that the oil covers or wets the sulphide mineral particle and does not the gangue; and this mineral particle, by means of induced aid is concentrated on the surface. The authors of this thesis have not attempted to explain the reason or reasons why minerals will float; but have accepted the theories advanced …

The Rise Of Temperature In Concrete While Setting, Chester L. Hoffman

Undergraduate Theses and Senior Projects

No abstract provided.