209,401 research outputs found
Correspondence from S. M. Pratt, July 14, 1862
No full textCorrespondence from S. M. Pratt regarding absent soldiers from Franklin Countyhttps://digitalmaine.com/absent_soldiers/1037/thumbnail.jp
Letter from J.W. Pratt to Mike Schecter, 1968-06-18
No full textA typewritten letter from J.W. Pratt to Mike Schecter. In this letter, Pratt describes industrial opportunities in Hopkins County, Texas.https://lair.etamu.edu/scua-june-tuck-docs/1006/thumbnail.jp
William M. Pratt letter, MSS.1163
No full textAbstract: Letter dated 22 April 1864, from Head Quarters, Sub-district of the Pamlico, Washington, North Carolina, to Commander Renshaw, warning him of enemy troop movementsScope and Content Note: The collection contains a letter dated 22 April 1864, from Head Quarters, Sub-district of the Pamlico, Washington, D.C., to Commander Renshaw, warning him of enemy troop movements. The collection also contains a typed transcript.Biographical/Historical Note: William M. Pratt was part of some Union force reporting to a Commander Rebshaw in North Carolina during the Civil War
Corne de licorne : Communication de M. A.-E Pratt, à la 19ème séance de la société
No full textPratt A.-E. Corne de licorne : Communication de M. A.-E Pratt, à la 19ème séance de la société. In: Bulletin de la Société d'histoire de la pharmacie, 15ᵉ année, n°55, 1927. pp. 1-2
Galaxy-cluster gas-density distributions of the representative XMM-Newton cluster structure survey (REXCESS)
No full textWe present a study of the structural and scaling properties of the gas distributions in the intracluster medium (ICM) of 31 nearby (z < 0.2) clusters observed with XMM-Newton, which together comprise the Representative XMM-Newton Cluster Structure Survey (REXCESS). In contrast to previous studies, this sample is unbiased with respect to X-ray surface brightness and cluster dynamical state, and it fully samples the cluster X-ray luminosity function. The clusters cover a temperature range of 2.0-8.5 keV and possess a variety of morphologies. The sampling strategy allows us to compare clusters with a wide range of central cooling times on an equal footing. We applied a recently developed technique for the deprojection and PSF-deconvolution of X-ray surface brightness profiles to obtain non-parametric gas-density profiles out to distances ranging between 0.8 R500 and 1.5 R500. We scaled the gas density distributions to allow for the systems' differing masses and redshifts. The central gas densities differ greatly from system to system, with no clear correlation with system temperature. At intermediate radii (~ 0.3 R500), the scaled density profiles show much less scatter, with a clear dependence on system temperature. We find that the density at this radius scales proportionally to the square root of temperature, consistent with the presence of an entropy excess as suggested in previous literature. However, at larger scaled radii this dependence becomes weaker: clusters with kT > 3 keV scale self-similarly, with no temperature dependence of gas-density normalisation. The REXCESS sample allows us to investigate the correlations between cluster properties and dynamical state. We find no evidence of correlations between cluster dynamical state and either the gas density slope in the inner regions or temperature, but do find some evidence of a correlation between dynamical state and outer gas density slope. We also find a weak correlation between dynamical state and both central gas normalisation and inner cooling times, but this is only significant at the 10% level. We conclude that, for the X-ray cluster population as a whole, both the central gas properties and the angle-averaged, large-scale gas properties are linked to the cluster dynamical state. We also investigate the central cooling times of the clusters. While the cooling times span a wide range, we find no evidence of a significant bimodality in the distributions of central density, density gradient, or cooling time. Finally, we present the gas mass-temperature relation for the REXCESS sample, finding that , which is consistent with the expectation of self-similar scaling modified by the presence of an entropy excess in the inner regions of the cluster and consistent with earlier work on relaxed cluster samples. We measure a logarithmic intrinsic scatter in this relation of ~, which should be a good measure of the intrinsic scatter in the -T relation for the cluster population as a whole
Pratt Family Collection
No full textTwo interviews concerning the Pratt family. First interview (9 leaves) with R.W. (Robert Wesley) Pratt and his wife, Anne (Margach) Pratt, concerns George and Mathilda (Dempsey) Pratt moving to N.D. in 1880 from Ontario, George's brothers, James, WIlliam, and R.J., who moved to N.D., difficulties in plowing, W.J. Pratt and his wife, Dr. Charlotte Campbell, George Pratt's gift of property to his four children, James Pratt selling his business to L.J. (Lewis) Margach, mention of General Thomas M. Walker and his wife, their potato field, R.W's first car, sharpening a plowshare. Second interview (3 leaves) with R.W. Pratt concerns his grandfather, James Pratt, who survived being caught in a blizzard, his farm near the Red River, R.W. and his brother, John D., plowing, selling wheat, and his father, George. Also includes obituaries
La plus petite pharmacopée du monde [Communication de M. A.-E. Pratt]
No full textPratt A.-E. La plus petite pharmacopée du monde [Communication de M. A.-E. Pratt]. In: Bulletin de la Société d'histoire de la pharmacie, 10ᵉ année, n°35, 1922. pp. 94-96
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