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PARIS. Academy of Sciences, September 27.—M. Ed. Perrier in the chair.—Paul Appell: A second form of Θ functions of the fourth degree.—Henry Le Chatelier and Jules Lemoine: The heterogeneity of steels. An account of the application of an etching reagent proposed by Stead (methyl alcoholic solution of cupric and magnesium chlorides containing hydrochloric acid), with details of the proportions found to give the best results. Nine reproductions of microphotographs accompany the paper.—J. Haag: A system of differential formulae concerning the elements of a projectile submitted to a quadratic resistance of air.—Charles Rabut: The calculation of the strength of a beam reinforced with metal bands.—P. Vaillant: The laws of flow of liquids in drops. The weight of a drop from a given orifice depends on the number of drops per second. It is proved that the weight of a drop is a parabolic function of the frequency of fall, and experimental data are given in support of this.—P. W. Stuart Menteath: The Permian of the western Pyrenees.—Jules Welsch: The Pliocene lignites of Bidart, Lower Pyrenees. South of Biarritz there are deposits of lignite the age of which is near to the Middle Pliocene.—R. Chudeau: Rain and vapour pressure in western and equatorial Africa.—J. Bergonié: A new method of physical treatment of the after results of wounds: pneumatic pulsatory massage, A detailed description of the mode of application of mechanical massage to the treatment of masses of cicatricial tissue. Particulars of the results obtained will be published later.—P. Portier: The resistance of certain races of B. subtilis arising from insects to chemical reagents. The organisms, isolated from the larva of Tenebrio molitor and the chrysalis of Myeloïs cribrella, prove to survive very drastic treatment, including 50 hours with 5 per cent, phenol, 25 hours with 20 per cent, formaldehyde, 95 per cent, alcohol more than fourteen months, boiling chloroform, and other reagents. This resistance to chemical reagents is greater than any hitherto observed, and has a direct bearing on the problem of sterilisation of instruments and bandages.—J. Wolff and Mile. Nadia Rouchelmann: The properties of a chromogen universally distributed in plants.—A. de la Baume Pluvinel: The use of Hughes's induction balance for the detection of projectiles in the wounded.
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Societies and Academies . Nature 96, 166 (1915). https://doi.org/10.1038/096166a0
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DOI: https://doi.org/10.1038/096166a0