Societies and Academies

Abstract

PARIS Academy of Sciences, July 29 (CM., 201, 309–368). GABRIEL BERTRAND: Observations concerning the contributions by the atmosphere of sulphur to arable soils. Results of a series of determinations of sulphur as sulphate in rain water collected at Paris, 1931–1932, and of one year at Grignon, 1934-1935. The latter figure, although small, is sufficient to meet the requirements in sulphur of most cultivated plants. CHARLES NICOLLE and J. LAIGRET: Vaccination against yellow fever by the living amaril bacillus, dried and coated. The dried material was coated with either yolk of egg or olive oil before inoculation. Ninety-one persons were inoculated: there was no local reaction and no anaphylactic trouble. A single vaccination by this method replaces three inoculations by the current method. EMILE MATHIAS: Dauzere's theory on the conductivity of the air in regions exposed to lightning. E. J. GUMBEL: The greatest age, distribution and series. Statistical study of tables of survival. ALFRED LIENARD: The problem of the oblique derivative in the theory of potential. PAUL MONTEL: A formula of Weierstrass. PAUL BOURGEOIS and J. F. Cox:—The origin of comets. BASILE FESSENKOFF: A method of evaluation of the absorption in galactic nebulae. FERNAND BALDET: The resolution of Nova Herculis, 1934. According to an observation made at the Lick Observatory on July 4, Nova Herculis is double, with two com-ponents with 0.2 in. apparent distance. This is confirmed by observations made at Meudon on July 23 and 24. FRANgois CANAO: The study of intercrystalline corrosion by the method of luminous diffusion. D. G. DERVICHIAN: The interfacial tension between two liquids. ARCADIUS PIEKARA and MAURICE SCHERER: New experiments on the magnetic change of the dielectric constant of liquids. The large Bellevue electromagnet has been utilised in the study of the effect of the magnetic field on the dielectric constant as a function of the intensity of the magnetic field, the wave-length, and the angle between the electric and magnetic fields. E. FRIED-LANDER: The absence of natural p-radioactivity of beryllium. All commercial beryllium salts possess a marked radioactivity, but this is removed by careful purification, and it would appear that the pure products possess neither (3- nor radioactivity. MLLE. NIUTA KLEIN: The variation of the refractive index of non-annealed glass as a function of the time. The experimental results described appear to indicate that the variation of the refractive index with time is due to the transformation of the p variety into the a variety of the glass, a transformation prevented by rapid cooling. MLLE. MARIE LOUISE DELWAULLE: The system bismuth iodide-ammonium iodide water. ANDRE DE PASSILLE: The existence of a series of ammonium orthophosphates and orthoarsenates. G. DEDEBANT, PH. SCHERE-SCHEWSKY and PH. WEHRLE: The theory of the general circulation of the atmosphere. The average field of temperature. MME. ODETTE THELLIER: Condensation nuclei and particles in suspension in the atmosphere. PAUL CHABANAUD: The vomer, the ethmoidian complex and the peripheral path of the olfactory nerves of the soleiform Teleosteans. TIFFENEAU and BROUN: The microdetermination of ethyl, propyl and isopropyl bromides in the tissues of animals anaesthetised by these substances. OLIVIER GAUDIN: The comparative toxicity of the pyrethrines towards different classes of animals. Pyrethrines are highly toxic to Crustacea; with other animals, the toxic action is variable. MAURICE ROSE and HENRI BERRIER: The appearance of substances functioning as plant auxins, in the course of the development of Discoglossus pictus. JACQUES BENOIT: New experiments relating to the stimulation by light of the testicular development in the duck. CLEMENT COURTY: The magnetic micro-estimation of iron in the blood. MAURICE PIETTRE: The physico-chemical action of some electrolytes on the myxo-proteid of the blood serum. SERGE METALNIKOV and L. Y. MENG: The utilisation of micro-organisms against mole-crickets (Gryllotalpa vulgaris).