Societies and Academies

Abstract

PARIS. Academy of Sciences, July 28.—M. Léon Guignard in the chair.—A. Laveran and G. Franchini: Some flagellas of insects obtained in a pure culture, and in particular Crithidia melophagi. Details of the technique for obtaining pure cultures are given, and proof of the pathogenic action on mice.—A. Rateau: The theory of aeroplanes: application to an example.—R. de Forcrand and F. Taboury: The stability of the sulphones formed by the iodides of sodium, rubidium, and cæsium. These compounds have the composition MI + 3SO2; their dissociation pressures have been measured at -22.5° C, 0° C, +9.65° C, and at 150 C, and the results are given in the form of curves.—N. E. Nörlund: . The polynomials of Euler.—Ch. Platrier: The elastic equilibrium of a homogeneous isotropic body of revolution submitted to radial forces either proportional or inversely proportional to the radius.—H. Abraham and E. Bloch: Recording galvanometers with movable needle.—E. Brylinski; The induction reaction of alternators.—E. Poirson: A method of secret telephony. The telephonic currents are deformed by periodic interruptions by mechanical means, and the message cannot then be understood. The distorted currents can be rectified, at the receiving end by a synchronised apparatus. Experiments have been carried out by this method with success over distances up to 600 km.—J. Lavaux: Electrolytic luminescence phenomena presented by certain metallic anodes.—Jh. Martinet: The indirubins.—Ch. Chavanne and L. J. Simon: The critical solution temperatures in aniline of mixtures of hydrocarbons. Application to the analyses of petrols.—H. Colin and O. Liévin: The spontaneous oxidation of complex organic compounds of cobalt. Alkaline solutions of glycerol or lactic acid containing cobalt absorb oxygen up to a maximum; of one atom of oxygen for one atom of cobalt. Other substances, such as mannitol, erythritol, and glucose, under similar conditions absorb oxygen continuously beyond this limit.—P. Russo: The Eocene containing phosphate at Oued Zem (western Morocco).—G. Reboul and L. Dunoyer: The utilisation of temperature for the prediction of barometric variations.—L. Blaringhem: Floral variations in the large marguerite, Leucanthemum vulgare.—Mme. E. Bloch: Anatomical modifications of roots by mechanical action. Compression causes important local modifications, but the general development of the plant is uninfluenced, flowers and fruit remaining normal.—H. Bierry: Food ration. The minimum requirements of sugar and of fat.—L. Vialleton: The epiphyses and cartilage of conjugation in mammals.—A. Paillot: The cytology of the blood of the caterpillars of the Macrolepidoptera.