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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

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

Description: Progress reports are given for three projects: Number 1-C quartz- fiber microbalance construction and maintenance, Number 9 design of multiple stirrer plating unit, and Number 10 design of rotating stage for foil photography.
Date: December 31, 1948
Creator: Olt, R.G.
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

Some Haulage and Hoisting Hazards in Western Mines

Description: Report issued by the U.S. Bureau of Mines discussing safety hazards in western mines. Mine hoisting and haulage accidents are presented. Accident prevention is also discussed. This report includes tables.
Date: December 1942
Creator: Denny, E. H. & Humphrey, H. B.
Partner: UNT Libraries Government Documents Department

Report of Petroleum and Natural-Gas Division: Fiscal Year 1947

Description: Report issued by the U.S. Bureau of Mines discussing the work completed by the Petroleum and Natural Gas Division during 1947. Petroleum engineering studies and natural gas field studies are presented. This report includes tables, illustrations, and photographs.
Date: December 1948
Creator: Cattell, Roscoe Arnold
Partner: UNT Libraries Government Documents Department

Neutron source progress report, October 1--31, 1948

Description: This document details progress in neutron source development by Mound Laboratory during the month of October 1948.
Date: December 31, 1948
Creator: Richmond, J.L.
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

Monthly information health report, March 1--31, 1948

Description: This document presents details about health concerns resulting from the activities of the Mound Laboratory during the month of March 1948.
Date: December 31, 1948
Creator: Miller, R.A.
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

Gamma scale chemistry progress report, May 1--31, 1948

Description: An attempt has been made to prepare a compound of postum (Polonium 210) analogous to K{sub 2}{sup TeBr}{sub 6}. A preliminary experiment indicates possible preparation of bromides of postum and that these bromides are analogous to the chloride of postum. Photomicrographs of two crystalline forms of a product resulting from the reaction of bromine and postum are included in this report together with procedure used to form these crystals. Intermediate compounds formed in the attempted preparation of potassium postum bromide include a white residue from nitric acid containing postum and a yellow material formed on the ignition of this white residue. This yellow residue was identical in appearance to the yellow dioxide of postum. A red crystalline precipitate resulted when the yellow residue, which may well be QO{sub 2}, was treated with solution of hydrobromic acid and potassium bromide. Investigation of the use of titanium trichloride as a reducing agent to titrate, quantitatively tellurium dioxide has not yielded concordant results. An effort is being made to determine the best conditions for such a titration potentiometrically. Variations in concentrations, temperature of titration, electrode surface, acid concentration, and degree of agitation are in suspect.
Date: December 31, 1948
Creator: Martin, A.
Partner: UNT Libraries Government Documents Department

Protective measures for personnel

Description: This document addresses radiation protection concerns for workers in the experimental laboratories and production plants where nuclear fission piles are being used. A broad in-depth discussion is provided based with the experiences gained in the Manhattan Project and being applied to contemporary activities. Discussion is thorough and encompasses control of external irradiations including alpha, beta, gamma, and neutron radiations; and control of radioactivity within the body by control of inhalation, ingestion, and entrance through skin or wounds. General measures for the control of radiation hazards is addressed by provision of clothing and waste disposal. An Appendix 1 is entitled General Rules and Procedures Concerning Activity Hazards.
Date: December 13, 1946
Creator: Nickson, J.J.
Partner: UNT Libraries Government Documents Department

Neutron source progress report, August 1--31, 1948

Description: The preparation and shipping of several postum (polonium 210) neutron sources are described. Sources include those composed of postum- lithium, postum-beryllium, and postum-sodium.
Date: December 31, 1948
Creator: Richmond, J.
Partner: UNT Libraries Government Documents Department

Production division progress report, May 1--31, 1948

Description: A long term study on the possible effect of time on the micro-assay purity of postum product solutions is reported. It was determined that within the time periods studied (up to 102 days) time has no discernible effect on the mass purity of the postum electrodeposited from product solutions.
Date: December 31, 1948
Creator: Burbage, J.J.
Partner: UNT Libraries Government Documents Department