Societies and Academies
1893; Nature Portfolio; Volume: 48; Issue: 1249 Linguagem: Inglês
10.1038/048560a0
ISSN1476-4687
Tópico(s)History of Science and Natural History
ResumoPAXTS. Academy of Sciences, September 25.—M. de Lacaze-Duthiers in the chair.—M. Faye, in presenting the Connaissance des Temps for 1896, being volume ccxviii., pointed out some improvements newly introduced. The tables of the fundamental stars contain their magnitudes, their mean coordinates at the commencement of the tropical year, their variation and proper motion, and the dates at which the hour stars pass the meridian at noon and midnight.—The geographical coordinates of Tananarivo and the observatory of Ambohidempona (founded at Madagascar by the Rev. Father Colin), by M. Alfred Grandidier.—On the spectroscopic observations made at the Mount Blanc Observatory on September 14 and 15, 1893, by M. J. Janssen (see p. 549). Action of the electric are upon the diamond, amorphous boron, and crystallised silicium, by M. Henri Moissan.—Preparation and properties of crystallised carbon suicide, by M. Henri Moissan.—On the reproduction of oysters in the Roscoff aquarium, by M. de Lacaze-Duthiers.
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