Abstract
PARIS. Academy of Sciences, August 16.—M. Wolf in the chair.—The Perpetual Secretary announced to the Academy the death of M. Pomel, Correspondant in the Mineralogy Section.—On continuous groups of movements in three dimensions of any variety whatever, by M. G. Ricci.—On the differential invariants of a system of m + 1 points with respect to projective transformations, by M. E. O. Lovett.—On the representation of varieties of three dimensions, by M. Émile Cotton.—On commutators, by M. P. Janet.—Atmospheric carbon dioxide, by MM. Albert Levy and H. Henriet.
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