Abstract
PARIS. Academy of Sciences, September 28. M. P. Appell in the chair. Remarks by M. Edmond Perrier on the life work of the late M. Jean P rez. P. Puiseux: The photographs of the Delavan comet 1913f, obtained at the Paris Observatory with the Henry—Gautier equatonal. From these photographs, taken September 5 6, the necessary elements can be obtained for deter— mining very exactly two positions of the comet. J. Boussinesq: The approximate evaluation of the con— stant of filtration, for a filtering medium composed spherical grains of a given diameter. M. Coggia: Observations of the Delavan comet made at the Observatory of Marseilles with the comet—finder. Positions are given for September 14 15 (two observations), 17 18, with positions of the comparison stars. The comet is visible to the naked eye with a tail of about i,°. MM. Luizet and Guillaume: Observation of the solar eclipse of August 21, 1914, made at the Observatory of Lyons. D. Pompelu: A problem relating to abstract ensembles. Ch. Tanret: The plurality of the amyloses. Determinations of the absolute and relative percentage of amyloses dissolved by water at different temperatures in sixteen different kinds of starches.
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Societies and Academies . Nature 94, 191 (1914). https://doi.org/10.1038/094191a0
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DOI: https://doi.org/10.1038/094191a0