Societies and Academies

Abstract

PARIS Academy of Sciences, October 7 (C.R., 201, 573–628). Louis LAPICQUE: The nomenclature of chronaxies modified by the action of the nerve centres. Reasons are given for rejecting the terms static chronaxy and dynamic chronaxy. F.GANTMACHER and M. KREIN: Oscillatory matrices. RENE DE POSSEL: The abstract derivation of functions of ensembles. VLADIMIR BERNSTEIN: Concerning the methods of search for singular points of functions defined by Dirichlet series. ARNAUD DENJOY: Minkowskian functions. PAUL MONTEL: A theorem of Jacobi. EDOUARD CALLANDREAU: Corrective functions in the neighbourhood of the Rankine-Levy solution of the heavy massif supported by a rectilinear wall. SERGE NLKITINE: Suction by volumetric pumps. Discussion of the relations between the yield of a pump and the number of strokes per minute. MIROSLAV NENADOVITCH: The influence of the inter-inclination of one of the wings on the aerodynamic characteristics of rigid biplane cells of infinite span. ANDRE COUDER: The cellular construction of telescope mirrors. The deformations observed in cellular mirrors are much larger than would be expected from a study of the elastic properties and are probably due to the thermal conditions existing during polishing. MAURICE DESIRANT and JULES DUCHESNE: A new emission spectrum of sulphur in the photographic infra-red. MLLE. YVETTE CAUCHOIS: New measurements and observations relating to the L-emission spectrum of platinum. V. DOLEJEK and M. HYLMAR: The fine structure of the Lni absorption discontinuity of the rare earths. GABRIEL VALENSI: The kinetics of the oxidation of metallic wires. M. BOBTELSKY and MME. BOBTELSKY-CHAJKIN: The catalytic decomposition of hydrogen peroxide in the presence of mixtures of salts of manganese and copper. MME. MARIE FREYMANN and PAUL RUMPF: The absorption spectra in the near infra-red of amines and amides. Use of the phenomenon of dissimulation in the search for amphoteric ions. The influence of neighbouring groups. The presence of an absorption band at 1.04 is taken as a proof of the existence in a compound of the NH group. JEAN TIMMERMANS and GUSTAVE POPPE: The mutual solubility of heavy water and organic liquids in systems possessing a curve of negative saturation. MARIUS SAUVAGEOT and EDMOND ROUSSEAU: The transformation points of nickel steels. At the beginning of the transformations produced by heating, nickel steels undergo a very marked segregation: the first portions of austenite formed are highly charged with nickel, corresponding to a metal the transformation point of which is below 0° C. Manganese may give rise to similar phenomena. VLADIMIR FROLOW: The dissolved salts in the Sandjak waters. The electrical resistance of twenty-five waters from various sources has been studied as showing the variations in the content of dissolved salts. PIERRE DANGEARD: The identity of Laminaria Lejolisii and L. iberica. PIERRE P. GRASSE and MLLE. LOUISE LESPERON: The accumulation of acid colouring matters in the silkworm by different tissues according to the mode of access. GEORGE BEADLE and BORIS EPHRUSSI: The differentiation of the colour of the cinnabar eye in Drosophila melanogaster. A. PAILLOT: A new ultra-virus disease (polyhedra disease) in the larvae of Vanessa urticce. V. A. KOSTITZIN: A relation between the sex and the number of parasites in the same host. A mathematical study of the data on this subject given by A. Vandel. MME. PAULETTE CHAIX: The kinetics of the attack of glucose and of lactic acid by small bacterial masses. The idea of minimum active mass.