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Societies and Academies

1913; Nature Portfolio; Volume: 91; Issue: 2281 Linguagem: Inglês

10.1038/091523a0

1476-4687

Geological and Geophysical Studies Worldwide

PARIS. Academy of Sciences, July 7.—M. F. Guyon in the chair.—Paul Appell: Developments in series proceeding according to the inverse of given polynomials.— J. Boussinesq: The equations of dynamic equilibrium of the superficial layer separating a liquid from another fluid.—A. Lacroix: The rhyolitic and dacitic rocks of Madagascar, and in particuter those of the Sakalave region. Complete analyses of twenty-one rocks are given, and the distribution of the rocks in the area discussed.—A. Müntz and E. Lainé: Studies on the irrigation of soils. The minimum irrigation gives the best cultural results; it depends on the slope of the land, the nature of the vegetation, and the dimensions of the distributing channels.—G. C harpy was elected a correspondant for the section of chemistry in the place of the late Louis Henry.—Ch. Platrier: Meromorph solutions of certain linear integral equations of the third species.—M. Barre: Helicoids of the second species.—Th. Got: The symmetries of the reproductive groups of indefinite ternary quadratic forms.—A. Romieux: Contribution to the study of the terrestrial deformation.—C. G. Bedreag: Electrification by the X-rays. The charge depends on the pressure, the nature of the metal of the electrode, difference of contact potential between the electrode and the surrounding walls, and ionisation of the gas. In the present communication a special study is made of the function of the metal.—André Chéron: A new arrangement for the examination of stereoscopic photographs.—Henri Labrouste: The visibility of traces of foreign substances deposited on a surface of pure water. The method described permits of the thin layers being detected by optical means without the use of any special apparatus.—Mlle. Cécile Spielrein: The equilibrium of lithium sulphate with the alkaline sulphates in presence of their mixed solution at 100° C.—Ruby Wallach: The thermal analysis of clays. The double galvanometer of Le Chatelier-Saladin with a thermocouple was applied to the examination of various kaolins and clays, the heat absorption due to the volatilisation of water being shown by well-marked depressions on the curve. A slight heat evolution between 900° C. and 1000° C. was also observed in some cases, an effect probably due to a transformation of alumina.—André Job and Paul Goissedet: The cerium acetylacetonates. Ceric acetyl-acetonate has been prepared and analysed.—M. Dumesnil: Diketones obtained by the action of the xylylene dibromides on the sodium derivative of iso-propylphenylketone and their decomposition by means of sodium amide.—Roger Douris: The addition of hydrogen to some secondary α-ethylenic alcohols in presence of nickel.—Marcel Bandouin and Louis Reutter: The analysis of the contents of some Gallo-Roman vases and of a flask of perfume, found in a vault at la Vendée. These vases date probably from the third century. Styrax, turpentine, resin, asphalt, or Judean bitumen, and incense were found. These prove indirectly the existence of commercial relations between France and Asia Minor, Somaliland and Tudea.—J. Durand: A layer of aragonite crystals in the marls attributed to the Upper Trias in eastern Corbières.—C. Gaudefroy: The dehydration figures of different tvpes obtained in the same crystals.—A. Guilliermond: The rôle of the chondriome in the elaboration of the reserve products in fungi.—A. Marie and Léon MacAuliffe: The anthropometric study of 200 Madagascans.—E. Gley and Alf. Quinquaud xhe influence of the suprarenal secretion on the vasomotive actions dependent on the splanchnic nerve.—A. Barbieri: The difference in chemical composition between the great sympathetic system and the axial nervous tissue of the cranial and spinal nerves.—E. Bonrquelot and M. Bridel: The synthesis of β-geranyl-glucoside with the aid of emulsin; its presence in plants. The glucoside can be synthetised from geraniol saturated with water and glucose in presence of emulsin; a larger yield is obtained in aqueous acetone solution. The presence of this glucoside was proved in Pelargonium odoratissimum.—P. Noël Bernard and J. Bauche: The influence of the mode of penetration (cutaneous or buccal) of Stephanurus dentatus on the localisations of this Nematod in the organism of the pig and on its evolution.—E. Pinoy: The necessity of a bacterial association for the development of a Myxobacterium, Chondromyces crocatus.—F. Picard and G. R. Blanc: Coccobacillary infections in insects.—F. Kerforne: The Devonian iron minerals of Brittany.—Antonin Lanquine: The presence of layers containing Witchellia, of the lower Bajocian, at some new points of the Var.—Alfred Angot: A new barometric formula. The barometric formula communicated to the last meeting is equivalent to Babinet's formula. The latter in its original form is more easy to memorise.—Ladislas Gorczynski: The reduction in the solar radiation for 1912 from pyrheliometric measurements made in Poland.