Abstract
PARIS. Academy of Sciences, September 26.M.—Léon Guignard in the chair.—A. de Gramont and G. A. Hemsalech: The rôle of electrical actions in the emission and appearance of certain types of lines of the magnesium spectrum. A detailed account of the variations in the lines produced by changing the conditions under which the arc or spark is maintained. The arc was struck between magnesium electrodes under water, glycerol, and petroleum, and the sparks were passed in atmospheres of hydrogen, oxygen, coal gas, and nitrogen. During the first phase of the arc struck in a liquid drop, modifications of the lines are caused by the intense electric fields.—L. Casteels: A type of doubly continuous quadratic generation of a plane cubic given by nine simple points.—T. Varapoulos: Some properties of increasing functions.—J. Chazy: The Poisson stability in the problem of three bodies.—J. Guillaume: Observations of the sun made at the Lyons Observatory during the first quarter of 1921. Observations were taken on seventy-seven days in the quarter, and the principal facts are resumed in three tables; showing the number of spots, the distribution of the spots in latitude, and the distribution of the faculæ in latitude.—K. Ogura: The static field of gravitation.—E. Hulthen: The combinations in band spectra.—M. and L. de Broglie: The corpuscular spectra of the elements. A statement of experimental results on the corpuscular excitation of the heavy metals (uranium, thorium, lead), by the X-rays, and bearing on the L, M, and N levels of electrons.—E. Passemard: The alluvial terraces of Sebou above Fez. There is clear evidence of the existence in the Sebou valley of three terraces, 30 metres, 16 metres, and 7 metres. The higher terraces have certainly existed, but are now represented by débris.—A. Lumière and H. Couturier: Sodium oleate in the phenomena of shock. When a 1 per cent. solution of sodium oleate is injected into the jugular vein of sensitised guineapigs, it is known that these animals can stand, without inconvenience, an injection of the antigen which is mortal to a sensitised animal not treated with the oleate solution, and this protective action has been attributed to the property possessed by sodium oleate of diminishing the surface tension of liquids to which it is added. The authors do not accept this explanation, and show that solutions of sodium oleate alone can produce the symptoms of anaphylactic shock. These symptoms can be suppressed by solutions of sodium hyposulphite.
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Societies and Academies. Nature 108, 230–231 (1921). https://doi.org/10.1038/108230b0
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DOI: https://doi.org/10.1038/108230b0