Abstract
PARIS Academy of Sciences, June 24 (CJi., 200,2129–2250). ALFRED LACHOIX; The tectites of Iiido-China without figured forms. These are not large drops of glass shaped by fusion in the course of their fall, but the debris of larger blocks, probably fractured by shock on striking the ground. GEORGES URBAIN, PIERRE WEISS and FELIX TROMBE: A new ferromagnetic metal, gadolinium. The specimen of gadolinium used was pure except for 0-7 per cent of silicon and 0-03 per cent of iron. This metal is ferromagnetic. The absolute saturation reached 253-5 c.c.s. units, that of iron being 221-7. The Curie point is 16° 0. LUCIEN CAYEUX: The constitution of the Senonian phosphates of Egypt. JEAN BATTISTE SENDERENS: The catalytic decomposition of the monobromo derivatives of fatty hydrocarbons. The alkyl bromides behave similarly to the chlorides, except that the temperatures required are higher. GEORGES DTTRAND-VIEL was elected a member of the Section of Geography and Navigation, in succession to the late Ernest Fournier. A. KULAKOKF: Some theorems connected with Burnside's problem. ANTONIO MONTEIRO: A class of Fredholm nuclei developable in series of the principal nuclei. HENRI MINETJR: The absolute magnitude of 7? stars with emission lines. The results of the analysis show that these stars do not differ from the ordinary B stars from the point of view of their absolute brightness, the emission arising from the large extension of their atmospheres. MARC DE HEMPTINNE and JEAN SAVARD: The ionisation potential of the nitrogen molecule. The method of electronic shocks has been utilised and the apparatus calibrated with argon and mercury. The energy of dissociation of the molecule Na calculated from the results, 6-72 volts, is in good agreement with the 6-8 volts deduced by Henry by another method. NICOLAS STOYKO and RAYMOND JOUAUST: The velocity of propagation of short radio-electric waves, FRANCOIS CROZE: The general formulae of refraction of a light pencil. YEU Kr-HENG and YEOU TA: A new method for studying the corrosion of aluminium by soda. The metal is attacked by dilute soda solution in the presence of sodium tartrate, and the reaction followed by measurements of the rotatory power, A higher accuracy can be obtained by following the rotation than by the usual loss of weight method. M. MAHMOUD GHALI: A method for measuring the velocity of fall of spheres in a viscous liquid. A photo-electric cell in conjunction with an electrical recording apparatus is used: the time can be measured to 0-001 second. ANDRE PIGNOT and HUBERT GATJDKY: The useful surface of the membranes of pressure regulators. LEON ARTSIMOVITCH, IGOR KOURTSCHATOV, LEON Miccov-SKII and PIERRE PALIBIN: Concerning the capture of slow neutrons by a nucleus. IGOR KOTJRTSCHATOV, LEON NEMENOW and IVAN SELINOW: The artificial radioactivity of ruthenium bombarded by neutrons. R. GREGOIRTS: Bragg's curve of tho H-rays. A. PERRET and R. PERKOT: The cryoscopy of mixtures of nitrogen peroxide and bromine. No evidence could be obtained for the existence of the compound NO2Br. MARCUS BRUTZCUS: A method for calculating a priori the calorific power of a technical combustible. The method is based on the quantity of oxygen required for complete combustion. A. MICHEL and GEORGES CHATJDRON: The influence of magnetisation at a high temperature and of crystallisation on the form of thermomagnetic curves. TOHENG DA-TCHANG and Li KOTTONG: The precipitation of titanium as phosphate. Determination of the correct acidity for complete precipitation of titanium as phosphate. CLEMENT DUVAL: A new method for studying complex compounds. A modified method for the study of the migration of ions under tho action of an electric field can bo applied to the examination of various complex compounds. Examples of the results obtained are given. EDMOND GKTL.LOT: Lead acetobromide. L, DOMANGE: Tho action of steam on some metallic ftuorides. The results of experiments with the fluorides of silver, zinc and lead are given. PAUL BRASSEUR: Study of ferric ortho-phosphate. Description of the preparation and properties of anhydrous FePO4. HE SRI MOUREU and CLEMENT HAMBLET: The mechanism of the reaction between liquid ammonia and tantalum pentachloride. The experiments show that in TaClB two of the atoms of chlorine are more readily removed than the remaining three. PIERRE TRUNEL: The electric moments of isobutyl, isopropyl and pheiiyl chloro-sulphites. G. DARZENS and ANDRE LEVY: A new method of synthesis of derivatives of hydrophenan-threne and phenaiitlucnic hydrocarbons, MARCEL GODCHOT and MAX MOUSSERON: Some derivatives of 1,methy1.2,cyclopentanone and of 1,methy1.2,cyclopentanol. GEORGES BRUHAT and Louis WETL: The measurement of the rotation of tho plane of polarisation in oblique crystalline refraction, AN-TONIN LANQTJINE: New tectonic and stratigraphical observations on the zone of folding of Aups (Var). ANDRE DEMAY: The alternating or simultaneous action of magmatic and dynamic phenomena in the northern Cevcimes. Louis DANGEARD arid CHARLES BATARD: The conglomerates interposed in the Brioverian schists, to the north of the CoBvrons (Mayenne and Sarthe), and the nature of the cado-mian movements. GILBERT MATHIKIJ: The tertiary faults of Vendee. MARCEL GESLIN: The influence of a current of warm water on the air and radon dissolved in a cold water. V. FROLOW: The annual component {pluviometry and hydrometry in the Argentine). ALEXANDRE DATTVILLIER: Study of the terrestrial field, of the atmospheric ionisation and of the vertical current at Scoresby Sound during the polar year. MLLE. MADELEINE FRIANT: The jugal dental type of Pteromys xanthipes. MLLE. MADELEINE FOTJRCROY: Modifications of the insertions of the rootlets in wounded roots. PIERHB POTEL and RAYMOND CHAMINADE: The oxido-reduction potential of flours. SERGE TCHAKOTINE: Physiological researches on the Protozoa made by means of the ultra-violet micropnncture. JEAN RIPERT and OLIVIEII GAUDIN: The relative toxicity of pyrethrines I and II. ETLENNE WOLFF and ALBERT GINGLINGER: The characters of the intermediate sexual forms obtained experimentally in tho embryo of the fowl. PAUL CHISTOL, RAYMOND SEIGNEURIN and JEAN FOURCADE: The absence of dissociation of thiourca and substituted thioureas in dilute aqueous solution.
Article PDF
Rights and permissions
About this article
Cite this article
Societies and Academies. Nature 136, 234–235 (1935). https://doi.org/10.1038/136234a0
Issue Date:
DOI: https://doi.org/10.1038/136234a0