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VILLARD, P (PAUL ULRICH). - THE DISCOVERY OF GAMMA RAYS AND GAMMA RADIATIONBiblio.com

Sur la réflexion et la réfraction des rayons cathodiques et des rayons déviables du radium. Sur le rayonnement du radium.

1900rif. 48207Paris Gauthier-Villars 1900. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences" Tome 130 No 15 a. No 18. Pp. 962- 1044 a. pp. 1145- 1220. Entire issues offered. Stamp on first pages. A few tears to margins. Poor paperquality fragile. Villard's papers: pp. 1010-1012 a. 1178-1182 textillustrations. First apperance of Villard's two papers in which he announced and described the discovery of a new type of radiation more powerfull and penetrating than alpha-and beta rays. The new type of rays was named by Rutherford as gammarays."His Villardexperiments in radioactivity led to the unexpected discovery of gamma rays in 1900. Villard recognized them as being different from x rays because the gamma rays had a much greater penetrating depth. He had discovered they were emitted from radioactive substances and were not affected by electric or magnetic fields. These came to be called gamma rays by another scientist Ernest Rutherford. It wasn't until 1914 that Rutherford showed that they were a form of electromagnetic EM like light only with a much shorter wavelength than x rays. Now we know that gamma rays are a form of EM radiation similar to x rays. Gamma rays tend to have a higher energy and a shorter wavelength than x rays do. However the dividing line between these two forms of radiation is not clearly defined. Scientists typically apply the term gamma ray to EM radiation with energies above several hundred thousand electron volts." Hps - Healt Physics Society. - See Sigmund Brandt "The Harevst of a Century" Episode 6 p. 24 ff.The issues contains other importent papers HENRI BECQUEREL "Note sur la transmission du rayonnement du radium au travers des corps" pp. 979-984 and "Sur la transparance de l'aluminium pour le rayonnement du radium" pp. 1154-57. P. CURIE et G. SAGNAC "Électrisation négative des rayons secondaires produits au moyen des rayons de Röntgen" pp. 1013-1016. unknown

Herman H. J. Lynge & Søn A/S · Danimarca2500,00 DKK≈ 334,46 €

BERNARD, CLAUDE - THE DISCOVERY AND ISOLATION OF GLYCOGENEBiblio.com

Sur le mécanisme de la formation du sucre dans le foie. Suite Sur le mécanisme. Remarques sur la formation de la matière glycogène du foie. 3 Papers.

1855rif. 47110Paris Mallet-Bachelier 1855 a. 1857. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences" Tome 41 No 13 and Tome 44 No 12 a. No. 26. Pp. 461-500 pp. 578-640 a. pp. 1293-1363 3 entire issues offered. Bernard's papers: pp. 461-469 pp. 578-586 a. pp. 1325-1331. Some scattered brownspots to the first paper. First printing of these two milestone-papers in physiology in which Bernard discovers and isolates glycogen from the liver shows that it is converted into blood glucose and discovers the process of gluconeogenesis. He further creates the concepts "experimental determination" and "local interieur"Bernard undertook the task of tracing out the various transformations of food stuffs within the animal organism beginning with the carbohydrates; and he not only found contrary to the accepted view that sugar was formed in the liver but he was also able to isolate a substance from the hepatic tissue which though not sugar was converted by fermentation into dextrose. He made a special study of its properties and called it "glycogen"."The culmination of Bernard's work on the glycogenic function of the liver. He invented the term "internal secretion" and can be said to have started the scientific investigation of the internal secretions although for 30 years the significance of his work was not generally realized. By his research on glycogene Bernard showed that the body not only can break down but can also build up complex chemical substances."Garrison & Morton .Claude Bernard 1813-78 was a key figure in French nineteenth-century science and one of the world's great physiologists. With good reason he has been called the ‘father of experimental medicine’.Garrison & Morton No. 1000 a. 999.1 unknown

Herman H. J. Lynge & Søn A/S · Danimarca4500,00 DKK≈ 602,02 €

BECQUEREL, HENRI - THE DISCOVERY OF RADIO-ACTIVITY - THE BEGINNING OF THE NUCLEAR AGEBiblio.com

Sur les radiations émises par phosphorescence. Sur les radiations invisibles émises par les corps phosphorescents. Sur quelques propriétés nouvelles des radiations invisibles émises par divers corps phosphorescents. Sur les radiation.

1896rif. 46854Paris Gauthier-Villars 1896. 4to. Near contemp. full cloth. Spine gilt and with gilt lettering. Bookmark "The Chemists Club" in gold on lower part of spine. Light wear along edges. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences" Tome 122 Entire volume offered.1633 pp. The papers: 420-421 pp. 501-502 pp. 559-564 pp. 689-694 pp. 762-767 and pp. 1086-1088. First appearance of the six landmark papers in which Becquerel documents his discovery of Radio-activity PROMPTING THE NUCLEAR AGE.Becquerel was an expert in fluorescence and phosphorescence continuing the work of his father and grandfather. Follwing the discovery of X-rays by Röntgen Bexquerel investigated fluorescent materials to see if they also emitted X-rays. He exposed a fluorescent uranium salt pechblende to light and then placed it on a wrapped photographic plate.He found that a faint image was left on the plate which he believed was due to the pichblende emitting the light it had absorbed as a more penetrating radiation. However by chace he left a sample that had not been exposed to light on top of a photographic plate in a drawer. he noticed that the photographic plate also had a a faint image of the pechblende. After several chemical tests he concluded that these "Becquerel rays" were a property of atoms. He had by chace discovered radio-activity and prompted thee beginning of the nuclear age. He shared the Nobel Prize for Physics in 1903 with Marie and Pierre Curie. The "Becquerel Rays" were later discovered to be a composite of three forms of emanation distinguished by Rutherford as alpha beta and gamma rays.Dibner: 163 the later Mémoire from 1903 - PMM: 393 1903- Mémoire - Garrison & Morton: 2001 only the first paper. - Magie "A Sourve Book in Physics" p. 610 ff. - Norman:157. hardcover

Herman H. J. Lynge & Søn A/S · Danimarca8500,00 DKK≈ 1137,16 €

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