Societies and Academies

Abstract

PARIS. Academy of Sciences, September 9.—M. Henri Becquerel in the chair.—The contact phenomena of phonolitic trachyte from Griounot, Cantal A. Lacroix.—Bi-secondary butylene chlorohydrin: Louis Henry. The secondary butyl alcohol, CH3—CH2—CH3(OH)CH3, was prepared synthetically from ethuimagnesium bromide and aldehyde; this was converted into the secondary iodide, and from this, by the action of alcoholic potash, symmetrical dimethylethylene was prepared. The chlorohydrin results from the interaction of this hydrocarbon and hypochlorous acid. Its physical properties are given.—The resistance of the air: M. Jouguet.—Contribution to the study of the alloys of cobalt and tin: F. Ducelliez. The present note deals with alloys containing between 57 per cent, and 66 per cent, of tin. The alloys are probably formed of a mixture of CoSn and Co3Sn2.—Celestite from Mokattam: M. Couyat.—Parasitic phanerogamic plants and nitrates: Marcel Mirande. Parasitic phanerogams without chlorophyll cannot absorb nitrates from their hosts. The green hemiparasites vary, some being capable of absorbing nitrates from the host, others not.—Variation in the ramification of umbels: H. Ricome.—The causes of the death of the young hippopotamus of the museum menagerie: E. L. Trouessart. The animal died from injuries to the head caused by the mother in repelling the young hippopotamus from the breast.—The culture of the turbot: R. Anthony.—The subterranean waters of the Basque country: E. A. Martel.