Abstract
PARIS. Academy of Sciences, August 26.—M. A. Bassot inthe chair.—Edouard Heckel: The cultural bud mutation of Solanum tuberosum. An account of experiments in the cultivation of wild potato plants fromChile, Bolivia, and Peru. The tubers produced fromthe cultivated plants were edible, and contained agreater amount of starch than the wild plants. The tubercles from Bolivia showed the characters of mutation; those from other sources appeared to be in courseof mutation.—W. H. Young: The summability of afunction of which the Fourier's series is given.—B. Bianu and L. Wertenstein: An ionising radiation,attributable to the radio-active recoil, emitted by polonium. It was found to be necessary to use apolonium film in these experiments not exceeding IOμμ in thickness. The curves obtained with a silver disccovered with this thin polonium layer, in presence of atransversal magnetic field of 1100 units, wereanalogous with those obtained in the case of radium C, and show clearly the existence of an absorbable radiation.—J. Bougault: Benzylpyruvic acid. The acid wasprepared by the action of alkaline solutions on phenyl-α-oxycrotonamide. The yields pf benzylpyruvic acid were good. The condensation produces of this acid with itself and with acetone were also studied.—H. Vincent: The active immunisation of man against typhoid fever Details of five cases are given whichshow that inoculations of typhovaccin have a preventive power not only against subsequent absorption of typhoid cultures, but also against a recent infection anterior to the inoculation.—Charles Nicolle, L. Blaizot, and E. Conseil: The conditions of transmission of recurrent fever by the flea. The evidence is againstthe assumption of hereditary transmission in theflea. Details: are given of studies in thenecessary conditions for infection.—J. Wolff: The stimulating action of alkalies and of ammonia in particular on peroxydase.—P. Chaussé: The vitality of the tubercle bacillus tested by inoculation and by inhalation.
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Societies and Academies. . Nature 90, 30 (1912). https://doi.org/10.1038/090030a0
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DOI: https://doi.org/10.1038/090030a0