Abstract
PARIS. Academy of Sciences, September 13.—M. A. Chatin in the chair.—On the permanent deformation of glass, and the displacement of the zero point of thermometers, by M. L. Marchis. An application of the theory of permanent deformations, due to M. Duhem, of which an account has previously been given.—On the electrolytic separation of nickel and cobalt from iron. Application to the estimation of nickel in steel, by M. O. Ducru. The solution of the sulphates of the metals is mixed with some sulphate of ammonium and excess of ammonium hydrate, and then submitted to electrolysis. The whole of the nickel, or cobalt, is deposited, together with a trace of iron. The latter may be determined by solution of the deposit in hydrochloric acid and precipitation with ammonium hydrate, and a corresponding deduction made. Samples of steel are first dissolved in nitrohydrochloric acid, and then evaporated with excess of sulphuric acid. The test analyses given are very satisfactory.—The functions of the thyroid gland, by M. E. de Cyon.—On the respiration of Carcinus mamas (Leach), by M. Georges Bohn. The author has observed, in this species of crab, the power of reversing the direction of the circulation of water in the branchial chamber.
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Societies and Academies. Nature 56, 512 (1897). https://doi.org/10.1038/056512b0
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DOI: https://doi.org/10.1038/056512b0