Brizard georges (11 résultats)

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Hardcover. Etat : Good. Interesting Academic and Pedagogical Connections Between Four Leading French Physicists, Two Signed Presentations From the Library of Maurice de Brolgie Sammelband of the theses of Leopold Brizard, Georges Sagnac, Paul Langevin, and Eugene Bloch. Two signed presentations. Included in this single volume: (1) Leopold BRIZARD, "Recherches sur la réduction des composés nitrosés deruthénium et de l osmium" (1902). Inscribed by Brizard to Maurice de Broglie. Paris: Gauthier-Villars, 1900, 75pp. [++] (2) Georges SAGNAC, (1869-1928): "De l optique des rayons de Röntgen et des rayons secondaires qui en dérivent". (1900). Thesis for the Universite de Paris, Gauthier Villars, 1900, 74pp. "From 1896, the year following Röntgen's discovery, to 1900 Sagnac studied the radiations produced by X-rays. He observed that secondary radiation is produced when X-rays fall in heavier metals. He showed that this radiation contained secondary X-rays (of lower frequency than the original X-rays) and negatively charged rays. He suggested that it was through the action of the negative rays that X-rays produce ionization in air" (DSB XII: 69-70) [++] (3) Paul LANGEVIN. (1872-1946)  "Recherches sur les gaz ionisés", Paris, Gauthier, Thesis for the Universite de Paris, 1902, 207pp. Inscribed by Langevin to Brizard, "To my comrade. Cordial memories, P. Langevin." [++] (4) Eugene BLOCH, (1878-1944):  "Recherches sur la conductibilité électrique de l air produite par le phosphore et sur les gaz récemment préparés". Gauthier Villars, Paris, 1904, 125pp. [++] 9.5"x 6", pagination: 74,(4);166,(2);(6),207,(2),125,(3)pp. Cloth-backed marbled boards; leather spine label (mostly rubbed away). Front hinge is sprung but attached. The whole is printed on modest-quality paper which is somewhat browned. Overall, a GOOD copy (4-5/10 or so, "10" being "new"). [++] A short explanation of the connections among these four+ physicists. Brizard signs his copy to Maurice de Broglie (1875-1960) , who was his teacher; Brizard winds up being Maurice's son Louis de Broglie's (1892-1987, Nobel 1929) teacher at Toulin. Then Paul Langevin, advisor and teacher to Louis de Broglie affectionately signs his paper to his teacher Brizard. ("Langevin advised de Broglie, whose groundbreaking dissertation proposed matter waves, forming the basis of quantum mechanics, a concept Langevin initially found astonishing but vital, connecting to modern ideas like pilot-wave theories and Langevin-type dynamics for quantum systems."--Wiki.) [++] Then there's the connection between Georges Sagnac and Eugene Bloch (Bloch being a student and assistant to Langevin for his lab work on gas discharges): "Georges Sagnac and Paul Langevin were known for their intertwined, yet initially conflicting, interpretations of the Sagnac effect. Sagnac discovered the effect in 1913, while Langevin provided its accepted theoretical explanation within the framework of relativity in 1921."--Wiki So there are a number of major and minor connections between these four plus their connections to the de Broglies. Inscribed by Author(s). …