Abstract
PARIS. Academy of Sciences, August 30.—M. Bouchard in the chair.—The improvement of the theory of partial equations of the first order: N. Saltykow.—A demonstration of the phase rule: M. Boulouch. A criticism of the demonstration of the phase rule by M. Müller, in which ihermodynamical considerations are excluded. The author regards some of M. Müller's assumptions as unjustifiable.—The hydrolytic dissociation of bismuth iodide: Rene Dubrisay. The effects of temperature and dilution have been studied. Two oxyiodides have been shown to exist, the red compound being BiOI; the second black oxyiodide gives a ratio of bismuth to iodine corresponding to Bi2O3: 5HI.—A simplified method and apparatus for determining the calorific power of gaseous combustibles: P. Lemoult. The method is based on the fact that the combustion of molecular proportions of hydrogen and oxygen or carbon monoxide and oxygen gives nearly the same heat evolution, and after absorption of carbon dioxide formed in the latter case, the contractions are the same. If carbon monoxide, hydrogen and methane are present, the contraction (a) after combustion and absorption of CO2 is measured, and also the oxygen consumed (fc). The approximate calorific value is P = 0.914a + 3.405b.—The pseudopolychroism of spheerolites: Paul Gaubert.—The extension and retrogression of the virgin forest of tropical Africa: Aug. Chevalier.—The Mesoplodon of la-Hougue (November 2, 1908): R. Anthony.—The proof of experimental ammoniuria in epilepsy: J. E. Florence and P. Clément. Ammonium acetate, administered in 4-gram to 6-gram doses, is in healthy individuals excreted mainly as urea. In epileptics under the influence of bromides the method of elimination is similar; in epileptics not under bromide treatment a marked elimination of ammonia coincides with the very frequent attacks.—Alcoholic fermentation in presence of sulphurous acid: P. Martinand.—The specificity of oxydases: J. Wolff.
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Societies and Academies . Nature 81, 329–330 (1909). https://doi.org/10.1038/081329a0
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DOI: https://doi.org/10.1038/081329a0