Abstract
PARIS Academy of Sciences, July 16 (C.R., 199, 173-248).—J. VINOGRADOV: Some new results in the analytical theory of numbers. EMILE OSTENC: The ergodic principle in Markoff chains with variable elements. SERGE FINIKOFF: Protective deformation of a couple of congruences. M. MURSI:—The values of the modulus of (z) at infinity. ANDRE WEIL:—A characteristic property of finite groups of substitutions. AUGUSTE LAFAY: The modifications of the Magnus phenomenon determined by the structure of the wind. Study of the effects of an air current on a polished rotating cylinder, with special reference to the existence of eddies in the air current. MME. EDM E CHANDON, EDOUARD BOUTY and ANDR GOUGENHEIM: Time determinations obtained with the aid of an equal altitude instrument, with prism and impersonal micrometer. Results obtained using a Baillaud self-recording optical micrometer. Comparison of three instruments. VENCESLAS POSEJPAL:—The formation of hydrogen in a vacuum. In a previous communication (CM., 198, 59) the author shows that certain hypotheses concerning the ether lead to the prediction of the formation of hydrogen in a vacuum. Further experiments are now described giving the effect of any hydrogen pre-existing in the tube. These show that any hydrogen pre-existing in the vacuum tube will not invalidate the interpretation given in the earlier note. MARCEL PAUTHENIER and MME. MARGUERITE MOREAU-HANOT: The study of an electrified space containing material particles. EDMOND GUILLERMET: The electrolysis of the chlorides of zinc and cadmium in methyl alcohol. JEAN SWYNGEDAUW: Study of the anodic depression in the electrolysis of gelatine. PIERRE FLEURY: An addition method for the exact study of the current given by a photoelectric cell as a function of the incident light flux. PIERRE SOUTY: The influence of circularly polarised light on the velocity of mutarotation of some sugars. A solution of a sugar giving mutarotation is divided between two polarimeter tubes and exposed to beams of dextrorotatory and l ¦vorotatory polarised light. It is shown that the photochemical effect is asymmetrical. HORIA HULUBEI: Intense sources of protons applicable to transmutations. The use of palladium charged with hydrogen for the production of the protons necessary for certain transformations markedly simplifies the working method, and gives yields equalling or surpassing other methods The new technique can be extended to the production of deutons. JEAN AMIEL: The preparation and explosion temperature of some complex compounds of copper nitrate, perchlorate and chlorate with ethylenediamine. The chlorates explode with great violence on heating and might prove useful as primers. HENRI PARISELLE and F. CHIRVANI: The emetic of saccharic acid. JAMES BASSET: The synthesis of ammonia under very high pressures, above 1,000 kgm./cm.2. The apparatus described and figured can work for long periods at permanent pressures between atmospheric pressure and 5,000 kgm./cm.2. At pressures of 2,000 kgm./cm.2 and higher, the velocity of the reaction is increased to such an-extent that the presence of a special catalyst is unnecessary. The presence of impurities in the gas mixture is less material thus coal gas may be used as the source of the hydrogen. J. PRAT: The thermal decomposition of the aryltrihydroxyarsoniu ¹ chlorides. L ON DENIVELLE: The neutral aryl sulphates. PAUL GAUBERT: Spherolites with helicoidal windings of the allantoins and their artificial coloration. F. DUPR LA TOUR and MLLE. A. RIEDBERGER: The effect of temperature on the crystalline network of certain normal dicarboxylic acids. ANTONIN LANQUINE: The structure of the Proven §al chains to the north-west and to the south of the grand canyon of Verdon. AUR LIAN VLADESCO: Cultural experiments with ferns: the formation of an aposporous prothallus. AUGUSTE and REN SARTORY, JACQUES MEYER and HANS B UMLI: The experimental reproduction of the cryptogamic diseases of paper. CH. CHABROLIN: The germination of the seeds of Thesium humile requires the intervention of saprophytic fungi. G. BARBIER: Negative absorption in soil, clay and humus. Louis GALLIEN: The determinism of the duality of evolution of the larv in Polystomum integerrimum. ARMAND DEHORNE: The active phagocytosis of the sarcolytes of the longitudinal muscles after the evacuation of the ovules in Nereis diversicolor. MLLE. ANDR E MICHAUX: The amounts of calcium in the lungs and kidneys of guinea pigs, normal and starved, suffering from acute or chronic scurvy. Observation of certain bladder troubles due to diet deficiencies. MME. MARIE PHISALIX and F LIX PASTEUR: The action of short waves on asp poison. KOHN-ABREST:—Rapid toxicological examination for the alkyl halides (chloroform, carbon tetrachloride, etc.). Application to the detection of these products in the air. MLLE. LISE EMERIQUE: Vitaminosis A and the chemical composition of the animal. ALEXANDRE SALIMBENI and GEORGES LOISEAU:—Concentration of the diphtheria toxin and anatoxin by means of freezing. FRED VL S, ANDR DE COULON and ANDR UGO: The statistics of survival in tar cancers of mice after removal of the tumour. Study of the toxic role of the latter.
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Societies and Academies. Nature 134, 390–392 (1934). https://doi.org/10.1038/134390b0
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DOI: https://doi.org/10.1038/134390b0