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46
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34
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30
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28
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28
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19
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17
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15
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12
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939 Matching Results
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Quarry Accidents in the United States During the Calendar Year 1941
Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date:
1943
Creator:
Adams, William W. & Wrenn, Virginia E.
Object Type:
Report
System:
The UNT Digital Library
National Safety Competition of 1942
Report issued by the U.S. Bureau of Mines on its annual safety contest between mine workers. Different types of mines enrolled in the competition and the winners and honorable mentions for 1942 are presented. This report includes tables.
Date:
October 1943
Creator:
Adams, William Waugh & Lawrence, T. D.
Object Type:
Report
System:
The UNT Digital Library
Geology of the Portage Pass Area, Alaska
Abstract: The Portage Pass area is in south-central Alaska, and includes part of the narrow neck of land that joins the Kenai Peninsula with the mainland to the north. This region is in general mountainous, elevations ranging from sea level to more than 4,000 feet on the peaks bordering the area. Several glaciers, all of which are apparently receding, extend into the area. Vegetation, chiefly alder and cottonwood on the valley lowlands and some spruce and hemlock on the lower slopes, extends to an elevation of about 1,000 feet, above which the slopes are bare except for occasional clumps of brush. The bedrock of the entire area is slate, argillite, and graywacke, apparently part of the same great series that extends from the Kenai Peninsula into the Prince William Sound region and is at least in part of Cretaceous age. The only igneous rocks recognized in the area are a few acidic dikes and a small diabase dike. Small, irregular quartz veinlets are widespread. The structure is not only complex but, owing to extensive metamorphism, is in many places obscure. A general northeast strike and steep to vertical dips of both bedding and cleavage planes are the rule, but there …
Date:
1943
Creator:
Barnes, Farrell F.
Object Type:
Report
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1942
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1942, activities, service reports, honors, finance, organizational leadership, and other information about scouting programs.
Date:
March 25, 1943
Creator:
Boy Scouts of America
Object Type:
Report
System:
The Portal to Texas History
Metallurgical Laboratory, Chemical Research - Analytical, Graphite Purity Research Program
Abstract. Chemical analytical studies of graphite raw materials have revealed new sources of petroleum cokes and pitches of greater purity than those previously used in the manufacture of project graphite. The use of these raw materials of exceptional purity has resulted in an improvement in k of the order of one per cent as compared with the AGOT-AGNT graphite typical of the previous production. A study of the graphitizing process has shown that no dangerous impurities are introduced in the graphite in manufacture; rather, the process actually purifies. furthermore, impurities are distributed homogeneously within the furnace charge; thus the AGOT-AGNT distinction is no longer necessary. A comparison of the methods of graphite testing has demonstrated excellent correlations between chemical analytical data, the results of the function test at Argonne, and the sigma pile experiments. It may therefore be inferred that chemical testing should be an adequate control of the graphite purity. Methods are described for the analysis of ash, B, V, TI, FE, and Ca in petroleum coke, pitch, and graphite.
Date:
December 22, 1943
Creator:
Boyd, G. E.; Curtis, R. E. & Johnston, W. H.
Object Type:
Report
System:
The UNT Digital Library
Antiknock Effectiveness of Xylidines in Small-Scale Engines
"The data presented in this report are part of a general program to determine the effects of xylidines on the knock-limited performance of currently used aviation fuels" (p. 2).
Date:
August 1943
Creator:
Branstetter, J. Robert & Meyer, Carl L.
Object Type:
Report
System:
The UNT Digital Library
Memorandum on Uranium Ore Processing
The following memorandum discusses experiments and methods to recover uranium from Colorado-Utah sandstone and leaving the vanadium in the tails, improving filterability.
Date:
November 19, 1943
Creator:
Brimm, E. O. & Gailey, A. J.
Object Type:
Report
System:
The UNT Digital Library
The Vapor Phase Hydrolysis of the Trichlorides of Lanthanum, Praseodymium, Samarium, and Americium
The following report studies the reactions of vapor phase hydrolysis of the trichlorides of lanthanum, praseodymium, samarium, and americium with gas mixtures of HCl and H2O passing over the solid materials mounted on a cantilever-type quartz fiber microbalance. This report calculates the values of the heats and entropies of the reactions, as well as the heat formation of LaCl3, 1254.9 kcal mol-(-1) that was obtained by determining the heat of the solution of La metal in 1.5M HCl.
Date:
1943
Creator:
Broido, Abraham
Object Type:
Report
System:
The UNT Digital Library
Manganiferous and Ferruginous Chert in Perry and Lewis Counties, Tennessee
From abstract: Perry and Lewis Counties, east of the Tennessee River, in west-middle Tennessee, are underlain by nearly flat-lying rocks of Paleozoic age, with Mississippian cherty limestones forming the greater part of the surface of the western Highland Rim Plateau ridges. Near the summits of the ridges there is a fairly definite horizon in the chert that contains manganese and iron oxides in varying degrees of concentration. Weathering of the mineralized chert has produced widespread float on the hill slopes and in the beds of small spring branches, and the presence of this float, some of it rich enough for metallurgical manganese ore, has encouraged a search for promising deposits in place. In the present study 52 localities where the mineralized beds crop out or have been prospected were examined.
Date:
1943
Creator:
Burchard, Ernest F.
Object Type:
Report
System:
The UNT Digital Library
The Biologic Effects of Radiation ; Training Program Lecture Notes
The following report provides data taken from investigations on radiation and the different biologic effects on it.
Date:
May 17, 1943
Creator:
Cantril, Simeon T.
Object Type:
Report
System:
The UNT Digital Library
Distribution Coefficient of Dâ‚‚O Between Triethylamine and Water
Summary: "Water containing 1.8% D2O was distributed between the two liquid phases formed with triethylamine at 20 and 35 C. The triethylamine was removed from each phase by aseotropic distillation with benzene before analyzing the water by determining its density with a quartz float. The ratios of the concentrations of the D2O in the water layer to that in the amino layer were 1.007 and 1.004 at 20 and 35, respectfully. The differences from unity are about the same as the errors of analysis."
Date:
August 31, 1943
Creator:
Carlson, H. C.
Object Type:
Report
System:
The UNT Digital Library
Magnolia Oil Field, Columbia County, Arkansas: Part 1. Petroleum-Engineering Study; Part 2. Derivation and Application of Material-Balance Equations
Report issued by the U.S. Bureau of Mines on studies conducted at the Magnolia oil fields in Columbia County, Arkansas. History, geology, and methods are presented. This report includes tables, graphs, maps, and illustrations.
Date:
September 1943
Creator:
Carpenter, Charles B.; Schroeder, H. J. & Cook, Alton B.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Fast Fission on k
The importance of fast neutron fission (i.e., fission caused by neutrons before being slowed down) was recognized by Szilard, and calculations similar to the present one have already been carried out by him, Feld, Ashkin, Wheeler, Wigner and others. The purpose of the present paper is to give a general formula for the contribution of fast fission to the multiplication constant, which will include all the cases already considered and will be applicable to more complicated geometries than those considered by the previous writers.
Date:
May 4, 1943
Creator:
Castle, H.; Ibser, H.; Sacher, G. & Weinberg, Alvin Martin, 1915-2006
Object Type:
Report
System:
The UNT Digital Library
Chain Reaction of Pure Fissionable Materials in Solution
The critical mass of 94-239 and the corresponding critical dimensions of homogeneous mixtures of 94-239 with various moderating media been calculated as a function of the concentration of 94. A simple transformation makes the figures applicated to92-235. the results are in essential agreement with the preliminary estimated made independently by Oppenheimer and Serber. The problem of the stability of a chain reaction in solution and questions of protection are discussed.
Date:
January 1, 1943
Creator:
Christy, Robert F., 1916-2012 & Wheeler, John Archibald, 1911-2008
Object Type:
Report
System:
The UNT Digital Library
Geology of the Coastal Plain of Georgia
From preface: The manuscript of this report, which is the culmination of field and office studies carried on intermittently s' ice 1914, partly in cooperation with the Geological Survey of Georgia, was completed early in 1938. It was prepared with the expectation that it would form part of a more comprehensive report on the geology of Georgia by several authors, which was intended to accompany a geologic map of the entire State on a scale of 1: 500,000. However, this map without the text was published in 1939 by the Georgia Division of Mines, Mining and Geology. Part of this map is reproduced herein as plate 1 without revision.
Date:
1943
Creator:
Cooke, C. Wythe
Object Type:
Report
System:
The UNT Digital Library
The Resonance Absorption Spectrum of Uranium
A model for the capture spectrum of uranium is introduced in which levels occur at 7, 30, 30+D, 30+2D, ..., ev. Gamma ray and neutron widths are derived from the experimental data for values of D between 10 and 25 ev. The constants of the 7 volt level prove to be independent of D. Extrapolation, using the one level formula, gives a capture cross section at (1/40) ev of 4.9 x 10(24) cm2; this number is, however, quite sensitive to the value taken for the resonance activation. Both neutron and gamma ray widths for the higher levels are approximately proportional to D.
Date:
November 24, 1943
Creator:
Dancoff, Sidney M., 1913-1951
Object Type:
Report
System:
The UNT Digital Library
The Pea Aphid on Peas and Methods for Its Control
"The pea aphid is present wherever peas are grown in the United States and is one of the most serious insect enemies of this important food crop. It has many generations a year, and under favorable conditions large and destructive populations of the pest may develop in a relatively short time. Natural enemies cannot be depended on for effective control, and therefore insecticides must be applied when threatening infestations of the aphid develop. Several insecticides and methods for their use are discussed in this bulletin. The choice of these will depend on local conditions, including the type of machinery and insecticide available, but any of them will be effective if applied as directed." -- p. i
Date:
1943
Creator:
Dudley, J. E. & Bronson, T. E.
Object Type:
Pamphlet
System:
The UNT Digital Library
Summary of an investigation of vanadium and uranium occurrence in Huerfano Park district, Raton Basin area, Huerfano and Costilla counties, Colorado
A report on the SOM-vanadium occurrences of the Huerfano Park District.
Date:
September 29, 1943
Creator:
Emerson, John F.
Object Type:
Report
System:
The UNT Digital Library
Measurement of the Slow Neutron Absorption Cross Section of Some Heavy Isotopes
The following report investigates cross sections for the absorption of slow neutrons of heavy isotopes. The purpose of these measurements was to determine the cross section of an isotope of element 94 for the process of fission by the absorption of a slow neutron, relative to the cross section of U235 for the same process, that is, to measure R.
Date:
1943
Creator:
English, Spofford Grady
Object Type:
Report
System:
The UNT Digital Library
The Toxicity of Fluorine
The following report discusses the toxicity of fluorine as described in literature on fluorine intoxication and case studies of Roholm's experimental observations.
Date:
1943
Creator:
Ferry, J. L.
Object Type:
Report
System:
The UNT Digital Library
Memorandum Listing the Areas in Colorado, Utah, Arizona and New Mexico that are Geologically Favorable for Developing Large Reserves of Vanadium Ore by Prospecting
Introduction: Vanadium ore is being mined at many places in western Colorado, southeastern Utah, northeastern Arizona, and northwestern New Mexico (fig. 1). Eight mills in this region produced about 4,300,000 pounds of V2 05 in 1942, representing about 90 percent of the vanadium obtained from domestic sources. Although ore production has mostly exceeded mill capacity since 1937, production during the last half of 1942 averaged only about 19,000 tons or ore a month, whereas the capacity of these mills total about 22,000 tons a month. At the expected rate of ore production, ore stockpiles will be exhausted sometime in 1944, and these mills will then have excess capacity. With more intensive prospecting than now practiced, however, it is believed that sufficient reserves can be indicated to sustain capacity operation of these mills for several years. This memorandum is prepared to specify those areas that are considered most favorable from a geologic standpoint for developing large reserves of vanadium ore by prospecting. It is based on intensive studies by the Geological Survey since 1939 in most of the areas that produce vanadium ore.
Date:
April 10, 1943
Creator:
Fischer, R. P.
Object Type:
Report
System:
The UNT Digital Library
Memorandum regarding vanadium ore production in the Colorado and Utah vanadium producing region
Memorandum discussing the production of Vanadium Ore in the Colorado and Utah Vanadium producing Region.
Date:
1943
Creator:
Fischer, R. P.
Object Type:
Report
System:
The UNT Digital Library
Report on Reserves and Production Situation of Vanadiferous and Related Ores in Colorado Plateau Region
From introduction: The general distribution of known deposits of vanadium-bearing sandstone, which also contain some uranium and radium, is shown in figure 1 1/ and Exhibit A, plate 53. 2/ During 1939-41 the Geological Survey made detailed geological studies of these deposits in the Uravan district, Montrose County, Colorado, as well as preliminary examinations in other parts of the Colorado Plateau vanadium region. In 1942 detailed geological studies were made o the deposits in the Egnar-Slick Rock district, San Miguel Co., Colo.; 3/ the Carrizo Moungains district, Navajo Indian Reservation, Arizona and New Mexico; 4/ the Placerville district, San Miguel County, Colo. 5/ and the Monticello district, San Juan Co., Utah. 6/ Since May 3, 1943, the Gelogical Survey has guided the Bureau of Mines program of prospecting these deposits in parts of Colorado and Utah.
Date:
October 10, 1943
Creator:
Fischer, Richard P. & Stokes, William Lee
Object Type:
Report
System:
The UNT Digital Library
Chemical Research -- U233 Production and Extraction; Report for the Month Ending June 21, 1943
Abstract. The precipitation of Pa233 with MnO2 from a solution of thorium nitrate has been studied in some detail and seems quite satisfactory up to 36 gm Th(HO3)4 4H2O per 100 cc solution. The concentration of Pa233 with respect to the manganese dioxide carrier and the thorium precipitated with the carrier appears to be accomplished quite well by either a series of MnO2 cycles or thorium iodate cycles. Volatility methods for both the separation of Pa233 from the original thorium and for its separation from MnO2 are now under investigation. It has been decided that thorium carbonate will the the thorium compound used in the pile at Site X.
Date:
June 21, 1943
Creator:
Franck, J.
Object Type:
Report
System:
The UNT Digital Library