Physical Sciences and Mathematics Commons^™

Selenium Sulfide -- A New Detector For Mercury Vapor, Birger Wilhelm Nordlander

Honors Theses

A new indicator for mercury vapor of extremely high sensitivity has been found; indeed, there seems to be practically no lower limit to the concentration that can be detected. This method is based on the reaction between active selenium sulfide and the vapor. The selenium sulfide is applied as a coating to paper and the coated paper is blackened on exposure to the air containing mercury vapor, the degree of blackening being a function of time of exposure, concentration of the mercury and other factors, which can be definitely controlled. Apparatus has been developed by means of which it is …

Preliminary Notice Of A New Proboscidean Amebelodon Fricki, Gen. Et Sp. Nov., Erwin Hinckley Barbour

Bulletin of the University of Nebraska State Museum

Pursuant to advice from Mr. A. S. Keith of Freedom, Frontier County, Nebraska, the first Morrill Geological Expedition of the year was organized with Mr. Philip Orr in charge, and Mr. Keith's farm was visited at once, and on April 4th, 1927, the mandible, one rib, and a toe bone of a new proboscidean were procured.

Annual Report Of The Department Of Irrigation, Fiscal Year 1926-27, George Hardman, F. L. Bixby, W. L. Stockwell, United States. Department Of Irrigation

Publications (WR)

Study of underground water in the Las Vegas Valley and the drainage of irrigated land in the Moapa Valley. F. L. Bixby was Senior Irrigation Engineer of the Irrigation Division of the Government Bureau of Public Roads.

Test 146: John Deere D 15-27, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT: John Deere D 15-27

TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear.

This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker ,point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated.

BELT HORSEPOWER TESTS …

Test 132: Lauson 20-40, 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 136: Shaw Model T 25, 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 137: Shaw Model T 45, 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 140: Hart-Parr 28-50, 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 143: Oil Pull Model X 25-40, 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 145: Oil Pull Model Y 30-50, 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 146: John Deere Model D 15-27, 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 …

Echo Dam And Relocated Union Pacific Railroad And Relocated Lincoln Highway Around Echo Reservoir, U.S. Department Of The Interior, Bureau Of Reclamation

All U.S. Government Documents (Utah Regional Depository)

Specifications, schedules, and drawings from the Salt Lake Basin Project, Utah: Weber River Division. This record contains plans for the relocation of the Union Pacific Railroad and Lincoln Highway and its affect on Echo Dam.

Test 131: Lauson 16-32, 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 135: Huber Super Four 40-62, 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 134: Wallis 20-30, 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 138: Continental Cultor #32, 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 139: Monarch 10 Ton Model F, 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 141: Oil Pull Model W 20-30, 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 142: Mccormick-Deering 10-20, 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 144: Rock Island 18-35, 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 147: Monarch 6 Ton, 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 …

Advertising Brochure: Massy Harris Wallis 20-30, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Development Of Selected Mathematical Instruments Representing Angular, Logarithmic And Arithmetic Computation, Lillian L. Troxell

University of the Pacific Theses and Dissertations

The Sextant in its earliest known form consisted of divided circles and compasses with simply sights. An early Creek astronomer of the second century after Christ, Claudius Ptolemaeus, or more commonly called Ptolemy, wrote a book entitled Megale Syntaxis tes Astron- omias, also known by the Arabic title Almagest. The instrument described in this book was called the Astrolable and was used to measure the angular distance between stars. It was made of two concentric vertical circles, the largest and outer circle was about sixteen inches in diameter with graduated arc; the central ring was movable and carried the two …

The Solubility Of Solid Paraffin In The Lower Molecular Weight Hydrocarbons, Paul Weber

Masters Theses

"In the process of oil refining, a certain fraction of distillate from the crude oil composes the so-called wax distillate fraction from which is obtained the various lubricating oils. But the presence of the waxes and solid paraffins in these oils is very undesirable as they possess no lubricating qualities. Consequently, they must be removed from this wax distillate before the oil can be marketed"--Introduction, page 1.

The Catalytic Action Of Neutral Salts : The Effect Of Normal Alkali Sulphates On Alkali Acid Sulphates In The Ketonic Splitting Of Ethyl Acetoacetate, Elbridge Alvah Goodhue

Masters Theses

"The catalytic effect of neutral salts has been investigated for numerous reactions and various theories propounded to account for their action. In this work the action of normal potassium and sodium sulphates on solutions of the corresponding acid salt has been investigated for two concentrations of the latter at three different temperatures. An attempt has been made to account for the observed actions"--Introduction, page 1.

A Study Of Triboluminescence, George David Read

Honors Theses

The study of triboluminescence, a phenomenon of no great practical value at the present time, is representative of a class of phenomena which scientists choose to call “cold light” and whose cause has for many years been without satisfactory explanation. Because of the fact that no use has been found for the action which brings about this production of light very little work has been done to determine, quantitatively, any facts regarding it, and we have only a few theories which have been advanced without sufficient experimental data to prove any of them. Hence, this work was undertaken with only …

A Direct Reading Ionization Gauge For Pressure Measurement, A Calibration Of Standard Radio Tubes As Ionization Gauge, And A Determination Of The Vapor Pressure Curve For Solid Titanium Tetrachloride, Neil B. Reynolds

Honors Theses

.The work to be described in the following pages falls naturally under three distinct headings, and will, therefore, be taken up into three separate sections.

The work on the Direct Reading Ionization Gauge as performed under the direction of Mr. C. G. Found of the General Electric Research Company and is the subject of a paper by him and the author now in the hands of the editors of the Journal of the Optical Society of America and Review of Scientific Instruments. The remainder of the work reported here was done by the author at the Research Laboratory of the …

A Study Of The Electrical Conductivity Of Glass, William Worden Day

Honors Theses

This work was undertaken with the view of finding the alternating-current resistance of a specimen of soda-lime glass, and of determining how it changes with time, temperature, and amount of current passed. In all runs, we have restricted our work to the case of a one to one replacement of sodium ions for sodium ions by using a fused mixture of sodium-nitrate and sodium-nitrate as the electrolyte which makes contact to each side of the glass. Electrodes of both platinum and nickel were used to make contact with the fused salts.

The Evaporation Of Pyroxylin Solvents And Non-Solvents And The Effect Of Dissolved Pyroxylin On Various Types Of Evaporation Curves, Herbert Heinrich

Bachelors’ Theses

In 1833 Braconnot described a body which he called Xyloidine. This material was obtained by the action of nitric acid on starch. In 1838 Pelonze produced a similar body by treating paper with nitric acid. Although these experiments were conducted several years before those of Soh8nbein, yet we give Schonbein the honor of priority because of bis extensive studies on the new compound "ex­plosive cotton wool". The material was produced by the combined action of nitric and sulphuric acids on cellulose. A patent was granted to him in the United States December 5, 1846, but little attention was paid to …

Summable Types Of Series, Dorothea Maria Baumann

Bachelors’ Theses

By an infinite series we mean a polynomial, or a sequence of terms, each of which derives from its predecessor according to a fixed formula or process; there is a one to one correspondence, consequently between the terms of the series and the set of positive integers 1,2,----,n,----. Summation means the finding of a finite expression equivalent numerically to the given series; known functions only may occur, connected by a fixed number of steps; such a closed expression is called the "sum" of the series.