Abstract
LONDON.
Chemical Society, December 7, 1893.—Dr. Armstrong, President, in the chair.—The following papers were read:—An apparatus for the extraction and estimation of the gases dissolved in water, by E. B. Truman.—The magnetic rotation of hydrogen chloride in different solvents, and also of sodium chloride and of chlorine, by W. H. Perkin. The author confirms his previous observations on this subject, and also shows that isoamylic oxide and hydrogen chloride do not appreciably interact. The magnetic rotation of hydrogen chloride in isoamylic oxide solution is 2˙245, in alcoholic solution 3˙324, and in aqueous solution 4˙300. The magnetic rotations of sodium chloride and of chlorine were also determined.—Analysis of water from the Zem-Zem well in Mecca, by C. A. Mitchell. The author gives analyses of water obtained by the late Sir R. Burton from the holy well in Mecca.—The preparation and properties of bromolapachol, by S. C. Hooker. Bromolapachol is obtained by reducing dibromolapachone; when dissolved in sulphuric acid it yields bromo-β-lapachone. The latter is converted into bromo-α-lapachone by the action of hydrobromic acid, whilst the reverse change occurs on dissolving the α-isomeride in sulphuric acid.—Studies on citrazinic acid (Part ii.), by T. H. Easterfield and W. J. Sell.—The oxides of the elements and the periodic law, by R. M. Deeley. The author obtains a new periodic diagram by plotting the atomic weights of the elements against the numbers obtained on dividing the densities of the oxides by the atomic weights of the corresponding elements.—The freezing points of alloys in which the solvent is thallium, by C. T. Heycock and F. H. Neville. The mean depression of the freezing point by the addition of one atomic proportion of gold, silver, or platinum to one hundred atomic proportions of thallium is 6°˙31; the addition of lead to thallium, however, raises the freezing point.
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Societies and Academies. Nature 49, 239–240 (1894). https://doi.org/10.1038/049239a0
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DOI: https://doi.org/10.1038/049239a0