Abstract
IN the first part of this work (NATURE, March 8, 1894, p. 436), measurements of the vapour pressures of a number of substances were given. The method used in the determinations was also fully described, and its accuracy discussed. The author's intention was to devote the second part of the book to a discussion of the theoretical bearing of the experimental material collected. Further experiments with substances belonging to chemical groups other than those previously examined revealed, however, the necessity of first enlarging this experimental material; the present volume contains the results of these additional measurements. The experimental method employed is the same as before, and the results are given in the form of numerical tables and of curves. Every precaution appears to have been taken to secure accuracy. Where previous observations exist, the results are compared together, and the satisfactory agreement found between the results obtained by Ramsay and Young, for example, by the statical, and by the authors by the dynamical method, may be regarded as further evidence of the trustworthiness of the latter. In this volume the measurements extend from about o to 760 mm., except in cases where the solidification of the substance prevented the measurements at lower pressures. The substances for which new experimental results are given are benzene, brom-benzene, benzaldehyde, phenol, aniline, benzonitrile, benzyl alcohol, nitrobenzene, benzoic acid, ethyl alcohol, propionic, normal butyric, valeric, heptylic, isobutyric and isocaproic acids, methyl-, dimethyl-, ethyl- and diethyl-aniline, phenyl-methyl ketone, methyl benzoate and benzoyl chloride.
Studien über Dampfspannkraftmessungen.
By Georg W. A. Kahlbaum; with the co-operation of C. G. von Wirkner and others. Part ii. 1st half. Pp. x + 221. (Basel: Benno Schwabe, 1897.)
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Studien über Dampfspannkraftmessungen. Nature 56, 246 (1897). https://doi.org/10.1038/056246a0
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DOI: https://doi.org/10.1038/056246a0