573 Matching Results

Search Results

Child's self-help overall.

Description: This document contains recommendations for the construction of a child's self-help overall, designed for freedom of movement and easy dressing.
Date: December 1948
Creator: Scott, Clarice L. (Clarice Louisba), b. 1899.
Partner: UNT Libraries Government Documents Department

Physics progress report

Description: This document is the December 1948 Physics Division Progress Report from the Mound Laboratory. Items covered include: (1) measurement of the vapor pressure of polonium, (2) x-ray diffraction analysis of tantalum, (3) use of the vacuum balance, and (4) updates on efforts to prepare an x-ray target, measurement of the resistivity of polonium, and construction of polonium gamma standards.
Date: December 1, 1948
Creator: Haring, M.M.
Partner: UNT Libraries Government Documents Department

Physics group progress report, May 1--31, 1948

Description: Various studies conducted at Mound Laboratory concerning physical properties of postum (Polonium 210) are described. Some studies are entitled Purity of Postum (Vacuum Balance Method); Vapor Pressure of Postum; X-ray Studies; Vapor Pressure by Effusion; Molecular Weigh of Postum; and Weighing Procedures for Macroassay.
Date: December 31, 1948
Creator: Knauss, H.P.
Partner: UNT Libraries Government Documents Department

Instrumental analysis progress report, June 1--30, 1949

Description: Several bismuth compounds have been submitted by E. Orban for examination by x-ray diffraction. The sample of polonium in contact with platinum mentioned in the May progress report was received and identified tentatively from its x-ray diffraction pattern as PtPo{sub 2}. Calibration of the Perkin-Elmer infrared spectrophotometer has been completed and a preliminary study of the infrared absorption of NiCO{sub 4} made. Data showing the spectral purity obtainable on three ultraviolet-visible spectrophotometers have been completed. The emission spectrum of a sample of volatile impurity from the operations process has been obtained.
Date: December 31, 1949
Creator: Timma, D.L.
Partner: UNT Libraries Government Documents Department

Thickness of Bituminous Coal and Lignite Seams Mined in the United States in 1945

Description: Report issued by the U.S. Bureau of Mines discussing bituminous coal and lignite seams found in the United States. The thickness of seams from several U.S. states is compared, as well as the mining methods employed. This report includes maps, tables, and illustrations.
Date: December 1947
Creator: Young, W. H. & Anderson, R. L.
Partner: UNT Libraries Government Documents Department

Multiple-Shift Mechanical Mining in some Bituminous-Coal Mines: Progress Report 4. Extraction of Pillars with Mechanized Equipment

Description: Report issued by the U.S. Bureau of Mines discussing "some methods and practices of mining coal mechanically where operations are conducted on more than one shift" (p. 3). Descriptions of mines, and mining methods are presented. This report includes tables, and illustrations.
Date: December 1942
Creator: Toenges, Albert L.; Maize, Earl R. & Jones, Frank A.
Partner: UNT Libraries Government Documents Department

The Activator, Special Issue Program

Description: This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community. Published monthly during long academic semesters. This special issue includes a full program for the events of the society's regional meeting at the University of Texas as well as descriptions of local attractions and special programs.
Date: December 1945
Creator: American Chemical Society. Dallas/Fort Worth Section.
Partner: UNT Libraries

The Activator, Volume 2, Number 3, December 1945

Description: This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community. Published monthly during long academic semesters. According to the cover, this issue includes "Abstracts of Papers Given at Texas Regional Meeting of The American Chemical Society, Dec. 7th & 8th, 1945."
Date: December 1945
Creator: American Chemical Society. Dallas/Fort Worth Section.
Partner: UNT Libraries

Hanford Site annual dangerous waste report: Volume 3, Part 2, Waste Management Facility report, dangerous waste

Description: This report contains information on hazardous wastes at the Hanford Site. Information consists of shipment date, physical state, chemical nature, waste description, handling and containment vessel, waste number, waste designation and amount of waste.
Date: December 31, 1944
Partner: UNT Libraries Government Documents Department

Electrodeposition research progress report, July 1--31, 1948

Description: The cell used in production plating has a platinum anode and a platinum cathode. The potential at which the platinum cathode rests is not independent of the current, bat varies with it. In order to separate postum from other cations by electroplating out of solution, it is necessary to establish the plating potential at a value which will allow complete plating of postum, but will preclude the deposition of as many other cations as possible. This potential has been found to be about 0.00 v. to the normal calomel electrode. The procedure for determining the amount of loss postum as related to the time between the removal from the plating bath and the immersion into the water rinse has been worked out. Two runs have been made, neither of which were very successful because of mechanical difficulties which occurred during the runs. The second run showed, however, that as the time increased the amount remaining in the water rinse also increased very rapidly. It has been found that a very excellent method of removing suspended material from a solution of aqueous hydrogen fluoride is to filter it through a funnel machined out of teflon with a disc of a porous teflon sheet. It was found that the spongy teflon used in this experiment had a porosity of about 16.5 microns. It was possible to reduce the size by compression to about 2.0 microns. In this way any porosity of material can be obtained depending on the original size of the pores and on the pressure used to compress it.
Date: December 31, 1948
Creator: Orban, E.
Partner: UNT Libraries Government Documents Department

Electrodeposition research progress report, March 1--31, 1948

Description: Plating of Postum out of Nitric Acid and Hydrofluoric Acid Solutions -- W. Abel and W. Raiff. Postum was plated out of 1.5 normal nitric acid and 1.0 normal hydrofluoric acid under similar conditions. The hydrofluoric acid plate was better appearing, and had a much higher curie density. However, neutron counts in these runs were quite similar. Neutron Counts -- W. Abel and W. Raiff. A study of the change of neutron counts over a period of time was started. Conversion of Active Hydrofluoric Acid Solutions to Hydrochloric Acid Solutions -- W. Raiff. A 99.99+ per cent conversion was effected. Conversion of Production Solutions to 1.0 Normal Hydrofluoric Add Solutions -- R. Bell. Good conversion has been achieved; however, further work needs to be done on complete change of postum from the production solution to 1.0 normal hydrofluoric acid solutions.
Date: December 31, 1948
Creator: Orban, E.
Partner: UNT Libraries Government Documents Department

Laboratory instrument design progress report, July 1--31, 1948

Description: One current model Ryerson quartz-fiber microbalance fitted with a quartz-fiber beam but lacking the entire optical system was received from Argonne National Laboratory on June 30, 1948. The first trails of the fiber drawing machine indicated excessive vibration originating in the motorized variable-speed transmissions and accentuated by the machine frame. Isolation of the motorized transmission vibrations from the drawing machine permitted successful drawing on first trials of the eight diameters of fibers between 750 and 5 microns needed for balance beam construction. Each trial yielded a full reel (approximately 150 feet) of usable fiber, through storage facilities were inadequate to preserve the entire quantity.
Date: December 31, 1948
Creator: Olt, R.G.
Partner: UNT Libraries Government Documents Department