Abstract
PARIS. Academy of Sciences, September 9.—M. Bouquet de la Grye in the chair.—Observations of the planet GQ, made at the Observatory of Algiers with the 0.318 metre equatorial, by M. F. Sy. The apparent positions of the planet, the positions the comparison stars, and the magnitudes, were measured on the five nights August 21 to 26. The magnitude varied between 8.5 and 9.6.—On the existence of fundamental functions, by M. W. Stekloff.—On integral invariants, by M. Th. de Donder.—On the impossibility of representing by isophygmic curves the distribution of instability in a given seismic region, by M. F. de Montessus de Ballore. The author concludes that since seismic phenomena are essentially discontinuous both in time and space, the isophygmic curves can have no real existence. Proof of this found in the paper by Oldham on the aftershocks of the great earthquake of June 12, 1897.—On the simultaneous appearance mosquitoes of the genus Anopheles and the first cases of malarial fever in the region of Constantine, by M. A. Billet. The first cases of malaria occurring during the season were nearly simultaneous with the first appearance of the mosquito. The proof in one case of t he presence of the malarial sporozoites the Anopheles presents a particular interest.—On the biology Galeruca xanthomelaena, by M. A. Menegaux.
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Societies and Academies . Nature 64, 524 (1901). https://doi.org/10.1038/064524b0
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DOI: https://doi.org/10.1038/064524b0