Abstract
PARIS. Academy of Sciences, June 2.—Mesnager: The optical determination of internal strains in solids of three dimensions. Remarks on a communication by Henry Favre on the same subject.—H. Deslandres: Properties of the series and abnormal lines in atomic spectra.—L. Blaringhem: The heredity of sex in Aquilegia vulgaris.—Louis Lapicque was elected a member of the Section of Rural Economy in the place of the late L. Lindet.—Gaston Julia: Some harmonic majorants.—Georges Bouligand; Poles, essential singularities.—Victor Valcovici: A mixed problem.—T. Bonneson: Inequalities between arithmetical means.—Leonidas Kantorovitch: Functions of the (U) type-Luigi Fantappie: The singularities of a linear analytic functional of a function of several variables.—J. Haag: The theory of the spiral.—Jean Chazy: The velocity of propagation of attraction.—N. Stoyko: The orbit of the trans-Neptunian star discovered at the Lowell Observatory.—J. Le Roux: The interpretation of Michelson's experiment.—Edgar Baticle: The problem of the wall supporting a mass of powder.—Mile. Simone Boudin: Coloured crystalline stratifications. Study of £>-toluidine, /3-naph-thylainine and diphenylamine. A modification of the technique proposed by Rene Marcelin for the study of the development of the elementary leaflet of 2-toluidine, with application to other substances.—R. Forrer: A method of discussion of the magnetic moments of alloys, and the common measure of atomic moments.—A. Dauvillier: The realisation of integral microradiography. The radiography of microscopic objects has offered great experimental difficulties. The author uses plates similar to those devised by Lipprnann for interferential photography, prepared with colloidal silver according to the technique described by Watteville. A reproduction of a radiograph, with a magnification of 600, is given.—Mme. Pierre Curie and Mme. S. Cotelle: The average life of ionium. The method used, based on the rate of formation of radium in a mixture of ionium and thorium oxides, assumes only a knowledge of the atomic weights of ionium, thorium, and of the ionium-thorium mixture utilised in the experiments. The value obtained, 119,000 years, is intermediate between that of Soddy (110,000 years) and that of St. Meyer (130,000 years).—F. Joliot and Mme. Irene Curie: The radiations associated with the emission of the a-rays of polonium.—G. Reboul and G. Dechene: The activation of matter by the brush discharge. The brush discharge, produced by e.m.f. of 20,000-100,000 volts, activates metallic plates, communicating an activity measurable by an electrometer, and persisting for up to 72 hours. The curve corresponds to the superposition of three superposed exponentials of periods of 3 minutes, 27 minutes, and 20 minutes. The residual activity has a period of 10.6 hours. From these measurements the activity produced would appear to be due to the disintegration of the emanations of radium and thorium.—Louis D'Or: The manometric and spectrographic study of the thermal dissociation of pyrites, FeS2. The thermochemical equation of the decomposition is 2FeS2 = 2FeS + S2 -61,000 cal. The energy of fixing the first atom of sulphur is 90,500 eal., whilst that of the second is 82,500 cal.—M. Bourguel and P. Daure: Chemical constitution and the Raman effect: the acetylene linkage.—Ch. Jovignot: Method and testing apparatus giving the extension coefficient and the breaking load of metallurgical products in thin sheets.—G. Dupont, J. Levy, and J. Allard: The mechanism of the action of catalysts in the autoxidation of abietie acid.—Georges Darzens: The transformation by isomerisa-tion of benzylvalerolactone into tetrahydromethyl-naphthalene carboxylic acid. This transformation is effected by heating to 120°-125° C. with 64-5 per cent sulphuric acid with constant agitation for eight days. The reaction is very slow, but, allowing for recovered lactone, quantitative.—Felix Francois: The action of selenoxanthydrol on 3-diketones and on ethyl acetoacetate. - Mile. Marie Therese Francois: The neutralisation of castor oil. A suggestion for the use of commercial triethanolamine for the removal of acid from castor oils used for lubricating purposes.—Paul Combes and Roger Campredon: The study of a new deposit of calcite exposed during the excavations for the new entrance to the port of Saint-Nazaire.—Jacques de Lapparent: The amount of titanium in bauxites.—L. Dolle: The marcas of the high plateau of Artois.—A. Guilliermond: Homo- and hetero-thallism in the yeasts.—Andre Dauphin: The histo-logical characters of roots developed separately.—Philippe Fabre: An electrical hsemodromograph.—Gordon H. Scott: The arrangement of the mineral constituents of the nucleus during mitosis.—I. I. Nitzescu and I. D. Georgescu: The amount of citric acid in some animal fluids (cephalo-rachidian fluid, aqueous humour, follicular liquid, amniotic fluid).
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Societies and Academies. Nature 126, 189–191 (1930). https://doi.org/10.1038/126189a0
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DOI: https://doi.org/10.1038/126189a0