Abstract
PARIS. Academy of Sciences, September 14.—M. P. Appell in the chair.—A. Lacroix: The recent eruption of Ambrym ( December, 1913) and the constitution of the lava from this volcano. The lava is of the angitic labradorite type, too poor in olivine to be considered a true basalt. A complete chemical analysis is given.—Kr. Birkeland and M. Skolem: Calculations of the lines of equal intensity in the zodiacal light.—B. Jekhowsky: The eclipse of the sun of August 20–21, 1914. Particulars of observations taken at the Observatory of Mont— souris.—Ch. Vaillant: The replacement of photographic plates by gelatino-bromide paper in radiography. By the use of a reinforcing screen with exposures of from 4 to 30 seconds good negatives were obtained. The cost is about one-thirtieth of the ordinary plates.—Julien Loisel: The monographic representation of the mean direction of the wind.
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Societies and Academies . Nature 94, 163–164 (1914). https://doi.org/10.1038/094163a0
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DOI: https://doi.org/10.1038/094163a0