Abstract
Academy of Sciences, August 17.—M. P. Appell in the chair.—A. Lacroix: The non-volcanic basic rocks of Madagascar. The mineralogical and chemical composition of the basic rocks are dealt with in the present communication. Complete chemical analyses of twentytwo rocks are given.—Otto Scheuer: The action of the radium emanation upon detonating gas. The combination of hydrogen and oxygen is rapidly brought about by the radium emanation; in one experiment the mixture exploded. Both water and hydrogen peroxide are produced during the reaction, and it is probable that the latter is the primary product.—A. Werner: The optical activity of chemical compounds not containing carbon. An account of the preparation of the cobaltamine salt, [Co(OH)2.Co(NH3)4]5Br6 + 2H2O, not containing carbon and possessing a specific rotatory power. The aqueous solution becomes inactive after two hours.—Paul Pascal: The role of valency in the additivity of diamagnetism.—N. A. Barbieri: The proximate analysis of wheat.—Gabriel Bertrand and Arthur Compton: A modification of amygdalinase and amygdalase due to age. Under the influence of time amygdalinase and amygdalase extracted from almonds lose their diastatic activity very slowly. The concentration of hydrogen ions most favourable to diastatic action increases with age.
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Societies and Academies . Nature 94, 27–28 (1914). https://doi.org/10.1038/094027a0
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DOI: https://doi.org/10.1038/094027a0