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Petroleum Refinery Statistics: 1930

Description: From Summary: "The year 1930 marked a turning point in record-breaking performances for refining industry. From the time of the first refinery statistics of the Bureau of Mines in 1916 through 1929 the utilization of crude at refineries and the production of the principal product (motor fuel) has increased steadily. In 1930, however, the depressed conditions had a noticeable effect on motor-fuel consumption, which only increased 5 per cent over that in 1929, compared with an average annual increase for the preceding decade of 16 per cent.
Date: 1932
Creator: Hopkins, G. R.

Phantom Gage Dimensioning (Combined Part/Gage specifications)

Description: Abstract: This memorandum discusses a new design definition technique, requiring no standard, which pictorially shows part and gage limits on the same drawing. When functional gages, test fixtures, or optical chart gages are the selected inspection method, design, manufacturing process, and gage engineers can use these drawings directly to replace the usual standards-based drawings. In essence, this advanced technology visually describes true position dimensioning and tolerancing. It enables product designers to directly control the acceptance process.
Date: July 1964
Creator: Roth, E. S.

Phase Equilibria: an Informal Symposium

Description: From introduction: The accurate prediction of phase equilibria plays an important. role in the chemical process industries. A grief overview of final phase equilibria predictive techniques is presented with special emphasis on methods in current use in industry. Areas were better fundamental understanding will lead to improved models are discussed whenever possible.
Date: January 1983
Creator: Eaton, B. E.; Ely, James F.; Hanley, H. J. M.; McCarty, Robert D. & Rainwater, James C.

Phenix City 1° x 2° NTMS area, Alabama and Georgia: data report (abbreviated)

Description: From Introduction: "The data presented here are reconnaissance data intended for use in identifying broad areas for further study. While care has been taken to provide reliable sampling and analyses, verification of individual analyses is beyond the scope of this report. The data should be viewed statistically because "one-point anomalies" may be misleading. Regional trends, however, should be reliable."
Date: August 1981
Creator: Bennett, C. B.

Phoenix 1° x 2° NTMS Area, California and Arizona: Data Report (Abbreviated)

Description: From abstract: This abbreviated data report presents results of ground water and stream/surface sediment reconnaissance in the National Topographic Map Series (NTMS) Phoenix 10 x 2 quadrangle. Surface sediment samples were collected at 1388 sites, at a target sampling density of one site per 15 square kilometers (6 square miles). Ground water samples were collected at 155 sites. Neutron activation analysis (NAA) results are given for uranium and 16 other elements in sediments, and for uranium and 9 other elements in ground water. Mass spectrometry results are given for helium in ground water. Field measurements and observations are reported for each site. Analytical data and field measurements are presented in tables and maps.
Date: July 1981
Creator: Bennett, C. B.

Photoelastic analysis of three-dimensional stress systems using scattered light

Description: A method has been developed for making photoelastic analyses of three-dimensional stress systems by utilizing the polarization phenomena associated with the scattering of light. By this method, the maximum shear and the directions of the three principal stresses at any point within a model can be determined, and the two principal stresses at a free-bounding surface can be separately evaluated. Polarized light is projected into the model through a slit so that it illuminates a plane section. The light is continuously analyzed along its path by scattering and the state of stress in the illuminated section is obtained. By means of a series of such sections, the entire stress field may be explored. The method was used to analyze the stress system of a simple beam in bending. The results were found to be in good agreement with those expected from elementary theory.
Date: November 1, 1939
Creator: Weller, R & Bussey, J K

A photoelastic investigation of stress concentrations due to small fillets and grooves in tension

Description: From Summary: "Factors of stress concentration for deep, sharp, and symmetrically arranged grooves and fillets in tension members have been determined photoelastically and are given in this report. Curves are given showing the distribution of principal stresses on the section through the grooves. Complete isopachic patterns for several basic cases of grooved bars are included."
Date: August 1951
Creator: Frocht, M. M.