UNT Libraries Government Documents Department - 4 Matching Results

Search Results

Mining and Preparing Domestic Graphite for Crucible Use

Description: From Prefactory Statement: "In this bulletin are presented the results obtained in the first two phases of the work outlined above. The bulletin is in two parts. The first part describes the methods of mining and milling used, suggests a standard method of sampling finished graphite, and describes a rapid and convenient method of analysis developed at the Pittsburgh station of the Bureau of Mines, to which has been assigned the analytical and microscopic work. The second part describes experiments on the concentration and milling of graphite, which were made at the Salt Lake City, Utah, station."
Date: 1920
Creator: Dub, George D. & Moses, Frederick G.

A Model for Flow Through a Glacial Outwash Aquifer in Southeast Franklin County, Ohio

Description: Abstract: A glacial outwash aquifer of about 70 square miles in the Scioto River valley southeast of Columbus, Ohio, was modeled as a potentially major source of water. The model was constructed from available hydrologic data: Records of precipitation, well hydrographs, well logs, two ground-water level surveys, and analyses of six aquifer tests. Utilizing this array of data, water levels determined from a series of steady-state simulations of different hydraulic conductivity distributions were calibrated against measured (December 1977) ground-water levels. The simulations that provided the best matches used two hydraulic conductivity distributions: One was an areally varying hydraulic conductivity distribution; the other an areally uniform hydraulic conductivity (40 feet per day) distribution. After these more probable hydraulic conductivity distributions were found, they were utilized in steady state maximal pumping simulations. The maximal well-field yield of these simulations was 20.5 million gallons per day for the areally varying hydraulic conductivity distribution, and 11.3 million gallons per day for the areally uniform hydraulic conductivity. Sensitivity of well yield to changes in well position and streambed leakance changes was investigated also.
Date: November 1980
Creator: Weiss, Emanual J. & Razem, Allan C.

Simulations of Non-Steady Flow in a Glacial Outwash Aquifer, Southern Franklin County, Ohio

Description: From introduction: This report is part of an overall study to model the flow and to describe the water-quality characteristics of the glacial outwash aquifer in part of the Scioto River basin. The purpose of this report is to describe the development of a transient-state digital-computer model and the simulated water-level resulting from anticipated withdrawal by up to six new municipal wells.
Date: 1983
Creator: Razem, Allan C.

A Study and Development of the Hickman Sea-Water Still

Description: From Introduction: "The report is organized into three major sections and three appendixes. In first major section are presented a brief historical account of the work done by other organizations prior to November, 1957, and a detailed description of the experiments conducted by Battelle with the No.4 and No. 5 stills. The second major section summarizes the results of cost studies. The third major section gives data, calculations, and derivations pertaining to the heat-transfer aspects of the Hickman still."
Date: September 1960
Creator: Buckel, W. L.; Beck, W. D.; Irwin, J. R.; Putnam, A. A. & Eibling, J. A.