Abstract
PARIS. Academy of Sciences, Sept. 5.—Paul Marchal: The natural strains of Trichogamma.—Riquier: The investigation of the humerical solutions of any system of integral algebraical equations with any number of unknowns.—Léonl Ppmey: The existence of non-linear- partial differential equations which are quasi-normal.—J. A. Lappo-Denilevski: The algorithmic solution of the problem of Riemann. —Jean Chazy: The advances and retardations of the times of passage of Mercury on the sun's disc.—Raoul Ferrier: The theory of the molecular field.—F. Gonseth and G. Juvet: The equations of electro-magnetism and Schrodinger's equation in a five dimensional universe.—Lucien Vallery: The stability of the catalytic properties of palladiumised asbestos. Details of experiments bearing on the determination of hydrogen in the atmosphere by the action of asbestos coated with palladium. Traces of hydrogen arsenide and antimonide do not appear to poison the catalyst, neither does the catalytic power of the metal appear to be affected by repeated use.—Pierre Thomas and Mile. Marie Sibi: Contribution to the study of the structure of jellies. Researches on the crystallisation of l-arabinosazoiie. By the addition of a suitable foreign substance it is possible to modify the crystallisation of arabinosazone in such a manner that a pseudo-gel is produced. Tt is probable that the presence of impurities is a necessary condition for the-production of gels of this nature, containing long hair-like crystals.—A, Demolon and G. Barbier: The application of viscosimetry to the study of colloidal clay. Some information can bo obtained of the modifications of the state in a suspension of colloidal clay, especially the influence of electrolytes, by measurements of viscosity. It should be noted, however, that these suspensions do not obey Poiseuille's law, arid hence the results have only a relative value. —Pereira de Sousa: The basalts of Portugal. At Lisbon and in its neighbourhood there have been at least two series of volcanic eruptions showing differences in their chemical composition.—O. Munerati and A. Milan: The possibility of detecting the presence of forage beet-root and semi-sugar beet-root amongst sugar beet at the commencement of growth.— L. G. Seurat: The presence of Mercierella enigmatica in a river in Tunis.—G. Mouriquand, A. Leulier, and P. Sédallian: The pH. and the alkaline reserve in C-avitaminosis.—Edouard Chatton: The meiotic gametogenesis of Paradinium Poucheti.
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Societies and Academies. Nature 120, 498–499 (1927). https://doi.org/10.1038/120498b0
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DOI: https://doi.org/10.1038/120498b0