Abstract
PARIS. Academy of Sciences, August 25.—M. A. Chatin in the chair.—Persian truffles. Note by M. Chatin on a letter received from the late Dr. Tholozan.—The recent storms in France, July and August 1897, and the solar period, by M. Ch. V. Zenger. Further evidence in support of the author's theory of the parallelism of atmospheric, electric, magnetic and seismic disturbances, and their connection with the electro-dynamic action of the sun.—Summary of solar observations made at the Royal Observatory of the Roman College during the first half of the year 1897, by M. P. Tacchini.—Observations of the solar eclipse of July 29 at the observatory of Rio de Janeiro, by M. L. Cruls.—On the reduction of vectors and metric properties, by M. J. Andrade.—Critical constants of some gases, by MM. A. Leduc and P. Sacerdote.
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