Abstract
PARIS. Academy of Sciences, September 25.—M Armand Gautier in the chair.—Paul Appell: The θ functions of higher degrees.—F. Quenisset and F. Baldet: The discovery of a comet at the Flammarion Observatory of Juvisy. The comet was noticed in the constellation Ursa Minor on September 23 as a slightly oval nebulosity, about 4′ in diameter, with a central nucleus. (For further particulars see Our Astronomical Column.)— A. Demoulin: The R and Ω surfaces.—A. Blondel: The influences of deadening the waves in orientation in wireless telegraphy.—M. Reuttei: The analysis of a resin from an Egyptian sarcophagus. Besides mineral substances, there could be identified fragments of cypress or cedar wood, cedar resin, resins arising from styrax, mastic, Aleppo pine, and asphalte.—Jules Cardot: The mosses collected by the Antarctic expedition of the Pourquoi-Pas? The collection comprised thirty-four species, and enriched three genera of eleven species (seven of which are new), and two varieties (one new). The flora of the Antarctic region is poor compared with that of the Arctic region.—Paul Marchal: The obliteration of sexual reproduction in Chermes piceae.—E. A. Martel: The construetion of roads and other works in limestone. It is pointed out that limestone is a dangerous material for public works, owing to the infiltration of water into fissures. In constructing roads and tunnels in limestone or dolomite, it should not be forgotten that these pseudo-compact rocks, owing to the existence of water in fissures and pockets, are especially delicate from the engineering point of view: very slight artificial derangement may have very serious effects on the stability of such a rock mass.—Ph. Nógris: The discovery of the Carboniferous and Eocene formations at Mis. Guiona and Vardoussa, west of Parnassus.
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Societies and Academies . Nature 87, 473–474 (1911). https://doi.org/10.1038/087473a0
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DOI: https://doi.org/10.1038/087473a0