Berard jacques etienne (12 resultados)

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Title : Extrait des Annales de Chimie, fevrier 1813. 8vo. [4], 115, [1] pp. Half-title, 2 folding engraved plates. Modern navy-blue cloth (no embellishments!). Fine. Rare. [121] "The same year [1811], Berard's experiments with Francois-Etienne de La Roche won the prize [1812] of the First Class of the University [Paris Academy of Science], for determining the specific heat of gases using a copper calorimeter." / Francois-Etienne de La Roche (or Delaroche) was a Genevan physician, naturalist, chemist, botanist and ichthyologist. "De La Roche became infected with typhus bacteria and died in 1813, only just aged 32, during the same epidemic that his father also succumbed to." / Jacques Etienne Berard was a French naturalist, chemist and physicist. He was the first professor of toxicology at Montpellier. He was a pioneer in chemical engineering, including pharmaceuticals, and was managing director of La Paille, the manufacturing site that had been founded by Chaptal in 1782.…

1st Edition. BOUND FIRST EDITION OF THREE 1813 WORKS BY DELAROCHE AND BÉRARD THAT TOGETHER ESTABLISHED THE FIRST PRECISE MEASUREMENTS OF THE HEAT CAPACITIES OF GASES & established beyond argument that the specific heats of various gases differ from each other. All three papers are noted in the Dictionary of Scientific Biography as important original works. Prior to 1812, the state of specific-heat measurements had yet to be established and the need to do so was well understood. The First Class (Mathematical and Physical Sciences) of the French Institute sponsored a prize competition with the goal of moving the state of specific-heat measurements beyond these initial attempts. "The competition was won by Fran ois Delaroche (1775-1813) and Jacques-Étienne Bérard (1789-1869). They used a constant flow method which involved passing a heated gas under a constant pressure through a spiral copper tube immersed in a calorimeter filled with water. From the amount of heat imparted to the water in unit time and the rate of flow of the gas, Delaroche and Bérard were able to calculate the specific heats (by volume) of various gases under constant pressure. "This ingenious method, along with the care they took in eliminating the sources of heat loss, won Delaroche and Bérard wide acclaim, and their results on the specific heat of various gases were considered the best available for several decades. Their work established beyond doubt that the specific heats of various gases were different from each other, the volumetric specific heats ranging from 0.903 for hydrogen to 1.258 for carbon dioxide (taking that of atmospheric air as 1)" (Buchwald, Oxford Handbook of the History of Physics, 480). CONDITION & DETAILS: Paris: Chez Klostermann. Volumes 85 and 86, bound as one. Ex-libris with NO spine markings and minimal interior markings (small stamp on title page, blank front flyleaf). 8vo. 8.25 x 5.5 inches (206 x 137mm). 3 plates. Tightly and very solidly bound in maroon cloth with a gilt-lettered spine; minor scuffing to the edge tips. The title page is clipped horizontally at the head about .25 inches in width and not impacting any text. Moderate foxing throughout, largely minor. Very good condition.…

Montpellier 8.V.1855.1 Seite 4°. Gestochener Briefkopf "Université de France / Faculté de Médecine de Montpellier". Mit Umschlag. Jacques Etienne Berard (1789-1869), französischer Naturforscher, seine gemeinsam mit so berühmten Kollegen wie Berthollet, Gay-Lussac und de La Roche führten zu wichtigen Fortschritten in Chemie und Physik. - Als Dekan der medizinischen Fakultät an den Mediziner Louis Marchant in Dijon wegen dessen Promotion. ". D'après les dernières instructions, les Diplômes de Docteur ne peuvent être délivrés par M. le Ministre qu'en produisant l'acte de naissance des élèves reconnus aptes à recevoir leur Diplôme. Cette pièce n'ayant pas été fournie par vous, je vous prie de me la faire parvenir sans retard, afin que votre diplôme puisse vous être promptement expédié .".…