Abstract
PARIS. Academy of Sciences, August 30.—M. Henri Deslandres in the chair.—G. Humbert: An arithmetical link between the real ternary quadratic forms and the indefinite forms of Hermite.—H. Deslandres: The recognition in stars of the successive layers of their atmosphere and the periodic variations of these stars. From the study of the calcium lines in the solar spectrum the existence of three layers in the solar atmosphere has been deduced. The same method can be applied to the fixed stars, and an account is given of the results obtained up to the present by various observers.—E. Ariès: The specific heat of saturated vapours at low temperatures. Reply to a communication by G. Bruhat.—J. Andrade: The regulating organs of chronometers.—E. Jouguet: Waves of shock in solid bodies.—M. Galbrun: The deformation of a helical spring.—M. d'Azambuja: The spectrum of the new star, in Cygnus. On August 25 and 28 the spectrum of the new star presented the appearance usual with novas in the course of the first stage of their evolution.—M. Burson: The spectrum of Nova Cygni.—C. Raveau: The thermodynamical properties of fluids in the neighbourhood of the critical state.—MM. Orékhoff and Tiffeneau: The hydrobenzoin transposition. The influence of the paramethoxy-substitu-tion on the dehydration of the triarylglycols.—G. Zeil: The ascending movements of the earth's crust and the recurrences of subterranean erosion.—E. Aubel: The influence of the nature of the carbon compounds present on the utilisation of nitrogen by Bacillus subtilis
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Societies and Academies. Nature 106, 166–167 (1920). https://doi.org/10.1038/106166b0
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DOI: https://doi.org/10.1038/106166b0