"At the present time the textile industry in Texas is seeking to normalize itself after running at a peak production for the last ten years. It is one of the most competitive of our industries. The mills in Texas have always had to compete with the large mills located in the Eastern states, which have many advantages over the Texas mills. ... It has been only recently since the manufacture of synthetic fibers began in Texas, and it has not yet been fully completed. At the present time only the ingredients for synthetic fibers are produced in Texas. ... Cotton and wool manufacturing may develop gradually, but in the field of synthetics appears the greatest opportunity for a future textile industry in Texas."

"The development of newspapers in Dallas can be classified into certain definite dates: 1849-1865---the founding of the first newspaper to the Reconstruction period following the Civil War; 1865-1885--the postwar period and the expansion of newspapers; 1885-1906--the development of the present newspapers, the Dallas Morning News and the Dallas Times Herald, and others; 1906-1942--the advent of sensational journalism and the emergence of the newspaper as big business; and 1942 to the present--a decade of unprecedented growth and entrenchment."--leaf iv.

InGaN based light emitting devices demonstrate excellent luminescence properties and have great potential in lighting applications. Though these devices are already being produced on an industrial scale, the nature of their radiative transition is still not well understood. In particular, the role of the huge (>1MV/cm), built-in electric field in these transitions is still under debate. The luminescence characteristics of InGaN quantum well structures were investigated as a function of excitation power, temperature, and biaxial strain, with an intent of discerning the effects of the electric field and inhomogeneous indium distribution in the QW on the radiative transition. It was found that the luminescence energy did not scale only with the indium concentration but that the QW thickness must also be taken into account. The thickness affects the transition energy due to quantum confinement and carrier separation across a potential drop in the QW. The luminescence peak width was shown to increase with increased indium fraction, due to increased indium inhomogeneity. The carrier lifetime increased exponentially with QW thickness and luminescence wavelength, due to increased carrier separation. Measuring the luminescence energy and carrier lifetime as a function of excitation density showed that the electric field can be screened by strong …

This thesis shows the social and economic history of the El Paso area from the time of Spanish settlers through present day.

The potential for contamination of groundwater by organic pollutants leached from in-situ spent shale was studied in a series of laboratory leaching experiments. Both batch-mode and continuous-flow column experiments were conducted to study the leaching phenomenon. Experimental variables included retorting characteristics of spent shale, leaching time, initial quality of leach water, temperature of leach water, and particle size of spent shale. Several unique samples of spent shale were examined during the eaching experiments, including spent shale samples produced during combustion retorting, inert gas retorting, and combustion retorting employing recycle gas. The solid-phase organic carbon content of spent shale samples ranged from 0.2 to 3.9 percent by weight. Leachate derived from the batch-mode experiments was analyzed for organic carbon, organic nitrogen, phenols, and acid/base/netral fractions. The highest levels of organic carbon were detected in leachate derived from spent shale produced during either inert gas retorting or combstion retorting using recycle gas. The highest levels of phenols were observed in leachate obtained from spent shale produced during inert gas retorting; significant levels of organic nitrogen were also detected in various leachate samples. The most predominant organic fraction measured in leachate samples was the neutral fraction associated with spent shale produced during inert …

A quadrupole mass spectrometric system coupled with mechanical decrepitation was constructed and calibrated to study fluid inclusions from an active geothermal system. Fluid inclusions in Salton Sea Scientific Drilling Project well cores and ejects from flow tests were analyzed. Ion currents from selected mass/charge ratio numbers were measured for gases from ruptured inclusions in epidote, calcite, and hematite vein minerals from different depths. Water, carbon dioxide, hydrogen sulfide, sulfur dioxide, and C1{minus}C4+ hydrocarbons and free nitrogen were analyzed.

This study is concerned with a critical comparison of the passive transfer mechanisms of tuberculin and chemical contact hypersensitivities in the guinea pig by use of a four phase experimental approach.

"The purpose of this study is to find what information is available from secondary sources on retail trade areas and to assemble and analyze it so that the information will be of value to those interested in the economy of the area...the following general conclusions are drawn: 1. The Denton retail trade area is primarily agricultual. Indicators of this fact are so many and so definite that there is little doubt but that agriculture and the rural population of the area will affect, to a considerable extent all business activity. 2. In 1947, the Denton retail trade area was not highly industrialized. The trading center is not centrally located within the state of Texas, but several markets are a few miles away. A good supply of labor is available within the area. With the present trend toward decentralization of industry, these facts point toward an expansion of manufacturing in the trade area. 3. In 1948, retailing in the trade center and in the area as a whole indicates a strong retail trade center. 4. The fact that the retail trade center would be a good sampling area for companies introducing new products is indicated by the youth of the population …

The history of the Osages from 1808 to 1839 may be conveniently divided into three major sections, each separated by a cession treaty. The first begins with the cession treaty of 1808 and terminates with the cession of 1818. It covers the Osages' relations with the whites and the eastern tribes during that decade. The second section begins with the 1818 session treaty and ends with the land cession of 1825. It likewise covers the tribe's relations with the eastern tribes and the whites. The concluding division covers the period from the Osages' last major cession treaty to their removal to Kansas in 1839, and includes their relations with the eastern tribes, the western tribes, and the whites. These three sections combined cover the most turbulent period in Osage history, a period in which the United States Government and the powerful eastern tribes took the extensive Osage lands by right of conquest.

The purpose of this investigation has been to determine the characteristics of the immune response to 1-fluoro-2,4-dinitrobenzene when this hapten is conjugated with various types of proteins.

Groundwater irrigation is critical to food production and, in turn, to humankind's relationship with its environment. The development of groundwater in Santa Clara Valley, California during the early twentieth century is instructive because (1) responses to unsustainable resource use were largely successful; (2) the proposals for the physical management of the water, although not entirely novel, incorporated new approaches which reveal an evolving relationship between humans and the hydrologic cycle; and (3) the valley serves as a natural laboratory where natural (groundwater basin, surface watershed) and human (county, water district) boundaries generally coincide. Here, I investigate how water resources development and management in Santa Clara Valley was influenced by, and reflective of, a broad understanding of water as a natural resource, including scientific and technological innovations, new management approaches, and changing perceptions of the hydrologic cycle. Market demands and technological advances engendered reliance on groundwater. This, coupled with a series of dry years and laissez faire government policies, led to overdraft. Faith in centralized management and objective engineering offered a solution to concerns over resource depletion, and a group dominated by orchardists soon organized, fought for a water conservation district, and funded an investigation to halt the decline of well …

The purpose of this paper is to give a historical account of the railroad systems in the southern states prior to 1860.

A detailed interpretation is presented of E-field ratio telluric, bipole-dipole resistivity mapping, and dipole-dipole resistivity data obtained in the course of geophysical exploration of the Leach Hot Springs area of Grass Valley, Nevada. Several areas are singled out as being worthy of further investigation of their geothermal potential. Comparison of the three electrical exploration techniques indicates that: the bipole-dipole resistivity mapping method is the least useful; the dipole-dipole resistivity method can be very useful, but is, for practical purposes, exceptionally expensive and difficult to interpret; the E-field ratio telluric method can be a highly successful reconnaissance technique for delineating structures and relating the resistivities of different regions within the survey area.

This paper contains a detailed interpretation of E-field ratio telluric, bipole-dipole resistivity mapping, and dipole-dipole resistivity data obtained in the course of geophysical exploration of the Leach Hot Springs area of Grass Valley, Nevada. Several areas are singled out as being worthy of further investigation of their geothermal potential. Comparison of the three electrical exploration techniques indicates that: the bipole-dipole resistivity mapping method is the least useful; the dipole-dipole resistivity method can be very useful, but is, for practical purposes, exceptionally expensive and difficult to interpret; the E-field ratio telluric method can be a highly successful reconnaissance technique for delineating structures and relating the resistivities of different regions within the survey area.

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