Abstract
PARIS Academy of Sciences, September 6.—M. Camille Jordan in the chair.—A. Lacroix: A new type of alkaline granitic rock containing a eucolite. This rock was found at Ampasindava (Madagascar), and belongs to the eudialyte-eucolite group, containing zirconia (16.4 per cent.), and the oxides of cerium, lanthanum, and didymium (22-5 per cent.).—J. Boussinesq: The effect of a gradual contraction in a water main on the pressure in the contracted portion. A mathematical discussion of the Venturi effect.—Charles Richet: The stimulating action of magnesium salts on the lactic fermentation. The maximum effect on the lactic fermentation is produced by 12-5 grams per litre of crystallised magnesium chloride, MgCl2,6H2O, very near to the concentration of the same salt found by P. Delbet to exert the maximum effect on phagocytosis.—Paul Vuillemin: The morphological value of the corona of the Amaryllidaceae.—Pierre Delbet and M. Karajanopoulo: Cytophylaxy. In the defence of the organism against infection the protection of the blood cells (cytophylaxy) is at least as important as the use of antiseptics, and the present paper gives an account of experimental studies of the action of the various solutions employed in the treatment of wounds on the living cells of the blood, studies specially aimed at finding out any substance capable of increasing the phagocytic properties of the white corpuscles. Most of the antiseptics in current use reduce the phagocytic power; the best results were obtained with a solution of magnesium chloride containing 12-1 parts per 1000. This solution has a marked effect in increasing phagocytosis.—F. Baldet: The helicoidal filaments of the Morehouse comet (1908c). The electromagnetic interpretation of the forms of the filaments leads to attributing them to jets of electrons emanating from the nucleus and illuminating the gases of the tail of the comet during their passage.—M. Auric: A quadruple series of hexahomologic triangles.— Nicolas Lipine: The reduction of the periods of Abelian integrals and a generalisation of Abel's theorem.—B. Galitzine: An apparatus for the direct determination of accelerations.—Ed. Detorme: The ligature of the external iliac artery.—F. Bordas and S. Bruère: The action of the ferments of urea in the destruction of organic material.
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Societies and Academies . Nature 96, 81–82 (1915). https://doi.org/10.1038/096081a0
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DOI: https://doi.org/10.1038/096081a0