Abstract
PARIS. Academy of Sciences, July 21.—G. Bigourdan: The astronomical stations of Chatillonsous-Bagneux.—L. Blaringhem: The heredity of the phases of flower opening in poppies.—F. Mesnil: The adaptation to man of the trypanosomes pathogenic to mammals. The author considers that it has been experimentally demonstrated that a trypanosome of animal origin, such as Tr. brucei, can adapt itself to man.—M. Aubert and R Duchene: The propagation of combustion in carburetted mixtures.—G. Bruhat and J. Terrien: The comparative absorption of active and racemic acids in aqueous solution. Between the wave-lengths 2653 A. and 2400 A., if racemic acid absorbs light differently from solutions of the active acids, the deviations are always less than 4 or 5 per cent in one direction or the other, and the average of the results shows that the absorptions are practically identical. These results confirm those deduced by Darmois from polarimetric measurements.—Daniel Chalonge: The mechanism of the continuous emission of the hydrogen molecule.—H. Ollivier: The thermal variation of the specific magnetic rotatory power in the case of cerium nitrate and nickel chloride.—F. Joliot: The determination of the period of radium-C by Jacobsen's method. Experiments with thorium.—Horia Hulubei: The preparation of very pure hydrogen in notable quantities by means of an electrolytic osmoregulator with palladium. The palladium tube of an osmoregulator is saturated with hydrogen by electrolysis of phosphoric acid, the anode being arranged so that the palladium tube is not altered in shape. By afterwards heating this tube, relatively considerable quantities of hydrogen are introduced into the vacuous tube.—Picon: Rendering some salts of camphocarbonic acid soluble in organic solvents. Various camphocarbonates, rendered anhydrous by prolonged exposure in a good vacuum over phosphoric anhydride, were examined for their solubilities in organic solvents. Some of these (neodymium, cerium, bismuth, gold) are readily soluble in organic solvents, others (copper, calcium, zinc, lead) when anhydrous are practically insoluble. But boiling with benzene, with subsequent removal of all the benzene, renders these salts more or less soluble in organic solvents.—Mile. M. Montagne and B. Casteran: The action of potassium hypobromite on some trisubstituted amides. The a-trisubstituted amides give good yields of iso-cyanates when submitted to the Hofmann reaction; subsequent treatment with hydrochloric acid gives the corresponding amines in quantitative yield.—Jean Gubler: The geological structure in central western Cambodia (Indo-China).—A. Marin, M. Blumenthal, and P. Fallot: Stratigraphical comparisons between the western extremity of the Betic and Penibetic zones of Andalusia and the north of the Riman arc.—Louis Besson: The daily variation of rain at Paris. A discussion of twenty years of observations made at the Observatory of Montsouris. The mean daily variation has two maxima and two minima, and this is due to two different causes, the daily convection currents and the nocturnal cooling.—M. and Mme.—H. Labrouste: The relation between certain periodical components of the solar activity and the daily amplitude of the magnetic declination.—Couvreur: Preliminary note on the structure of the shells of Gastropods.—Alb. J. J. Vandevelde and Alfr. Verbelen: New biochemical researches on earth. The dye absorption method gives very variable results with the same earth, even with the same dye; results using methylene blue were the most concordant, but further study is necessary. The adsorptions of dye, peptone, and centrifuged milk were compared. The three methods gave roughly comparable results.—M. and Mme. A. Chauchard: Researches on the relation between functional velocity and chronaxy.—Raymond-Hamet: The comparative physiological action of aspidospermine and quebrachine. In opposition to the usually accepted view, the alkaloids of Aspidosperma Quebracho must be classed in two different pharmacological groups. The experiments described show that the total alkaloids of this plant can act at once on the vagus nervous system and on the sympathetic nervous system. This suggests a new therapeutic application of these alkaloids.—G. Belloc, R. Fabre, and H. Simonnet: Contribution to the study of the biological activity of the sterols. Study of the plankton sterols. From two samples of plankton, taken at different periods of the year, the sterols were extracted and purified, care being taken to exclude the action of air and light so far as possible. These sterols were submitted to physical (absorption in the ultra-violet), chemical, and biological tests. One, collected in July, was biologically active; the other, collected in April, only acquired biological activity after irradiation. The biological activity of the plankton depends on several factors; the chief of which are light and the zoological nature.—Mme. Y. Khouvine, E. Aubel, and L. Chevillard: The activity of sodium fluoride towards the transformation of pyruvic acid into lactic acid.—H. Colin and E. Gueguen: The constitution of the sweet principle of Rhodymenia palmata. This is shown to be a monogalactoside of glycerol; the fresh alga may contain up to 5 per cent of this substance.—M. Marcille: The injection of formolated ether into the lymphatics of cancerous tumours. Injection of ether containing 0-5 per cent of formol is proposed, and one case in which it proved beneficial is described.
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Societies and Academies. Nature 126, 422–424 (1930). https://doi.org/10.1038/126422b0
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DOI: https://doi.org/10.1038/126422b0