Abstract
PARIS. Academy of Sciences, September 7.—M. P. Appell in the chair.—G. Bigourdan: Observations of the Delavan comet (1913f) made at the Paris Observatory. Positions given for September 2 and 3. The comet was visible to the naked eye in spite of the size of the moon. It appeared to be of the fifth magnitude.—M. Appell: A transformation of certain functions deduced from 0 functions of higher degree.—L. Mangin: The polymorphism of certain diatoms from the Antarctic. It is shown that the classification of diatoms by the markings or values is faulty, since these show for a given species much less fixity than the structure of the endochrome. The paper is accompanied by numerous iilustrations.—M. Fournier: The resistance of a fluid to the horizontal translation of a spindleshaped body, moving in the line of the axis of the figure.—P. Gaubert: The faces of solution of dolomite. A study of the relations between the crystalline symmetry and etching figures produced by the action of very dilute nitric or hydrochloric acids.
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Societies and Academies . Nature 94, 110 (1914). https://doi.org/10.1038/094110a0
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DOI: https://doi.org/10.1038/094110a0