Abstract
PARIS. Academy of Sciences, August 4.—M. Guillaume Bigourdan in the chair.—A. Lacroix: A new type of meteoric iron found in the desert of Adrar, Mauritania.—F. E. Fournier: An unpublished safety manoeuvre for preventing collisions between steamships during fog.—A. Haller and R. Cornubert: Study of two symmetrical and unsymmetrical dimethylpentanones. Symmetrical dimethylcyclopentanone condenses with benzaldehyde in the presence of hydrochloric acid, giving a compound C21H22O2: the unsymmetrical dimethylcyclopentane behaves differently, giving a true benzylidene compound.—Gabriel Bertrand and Hirosi Nakamura: A new case of physiological mutation in mice.—P. Sergesco: Some inequalities of Landau and Lindelof concerning monogene functions.—J. Cabannes and A. Lepape: The diffusion of light by krypton and xenon. The polarisation of the light diffused transversely by a pure inert gas is not total.—J. Guinchant: Role of the atmosphere in the propagation of Hertzian waves. Effects analogous with mirage in the case of light waves can be produced with Hertzian waves. The state of the lower atmosphere may be an essential factor in the propagation of radio-telegraphic waves. The changes in intensity and of direction of the waves, the differences in receiving during day or night, and influence of the seasons may be readily explained by normal meteorological variations.—Andre Job and Rene Reich: The catalytic activation of ethylene by organo-metallic nickel. A solution of phenylmagnesium bromide, to which a little anhydrous nickel chloride has been added, rapidly absorbs large volumes of ethylene. Subsequent addition of water gives ethane, ethyl-benzene, styrolene and diphenyl, but no benzene.—H. Gault and Mile. M. Urban: The soluble cellulose esters of the higher unsaturated fatty acids.—Max. and Michel Polonovski: The nitroso and benzoyl derivatives of eserine.—Ch. Maurain and L. Eble: A photographic recording seismograph with three components.—MM. Rothe, Lacoste, Bois, Mile. Dammann and Mme. Hee: Study of the propagation of the La Courtine explosions.—E. F. Terroine, Mile. S. Trautmann and R. Bonnet: The energy yield at the expense of the carbohydrates in the growth of the higher plants.—L. Emberger: Cytological observations on the bulb of Lilium candidum.—M. Couvreux: New observations on the photomotor reflex.—P. Vies, P. Reiss and E. Vellinger: Potentiometric measurements of the PH of the substance of the eggs of the sea-urchin. For the crude egg substance, the PH appears to be between 5 and 5-5 before loss of carbon dioxide; it rises to about 6-2 when this gas has been eliminated.—Ch. Dhere, A. Schneider and Th. Van der Bom: The photographic determination of the fluorescent spectra of haematoporphyrine in various solvents.—J. Regnier: The variation of the anaesthetic power of cocaine hydrochloride as a function of the proportion of hydrogen ions. The rapidity of anaesthesia is much more rapid for alkaline than for acid solutions. With high PH, anaesthesia is complete in two minutes.
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Societies and Academies. Nature 114, 371–372 (1924). https://doi.org/10.1038/114371b0
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DOI: https://doi.org/10.1038/114371b0