. A commentary on the scientific writings of J. Willard Gibbs. Gibbs, Joniah Willard, 1839-1908; Science; Thermodynamics. SURFACES OF DISCONTINUITY 675 Hulett: Z. physik. Chem., 47, 357 (1904). Dundon and Mack, and Dundon: /. Am. Chem. Soc, 45, 2479, 2658 (1923). Thompson: Trans. Faraday Soc, 17, 391 (1922). Attempts have also been made to measure the change in total surface energy owing to smallness of particle by determin- ing the heats of solution for small and large particles. See papers by Lipsett, Johnson and Maass in the /. Am. Chem. Soc, 49, 925, 1940 (1927); 50, 2701 (1928). 61. Conta
. A commentary on the scientific writings of J. Willard Gibbs. Gibbs, Joniah Willard, 1839-1908; Science; Thermodynamics. SURFACES OF DISCONTINUITY 675 Hulett: Z. physik. Chem., 47, 357 (1904). Dundon and Mack, and Dundon: /. Am. Chem. Soc, 45, 2479, 2658 (1923). Thompson: Trans. Faraday Soc, 17, 391 (1922). Attempts have also been made to measure the change in total surface energy owing to smallness of particle by determin- ing the heats of solution for small and large particles. See papers by Lipsett, Johnson and Maass in the /. Am. Chem. Soc, 49, 925, 1940 (1927); 50, 2701 (1928). 61. Contact Angles. The Adhesion of a Liquid to a Solid. Heat of Wetting Pages 326, 327 of Gibbs' treatment deal with the derivation. B Fig. 12 from the very general method, used earlier on page 280, of the well-known contact-angle relation [672]. The double relation [673] is necessary for an edge. Thus if the line of meeting receives a virtual displacement from the edge of the solid along the face of s in contact with A (Fig. 12) so as to allow the liquid B to come into contact with unit of area of this face, the inter- face between A and B is reduced by an area of amount cos a, where a is the angle YXP. (This is' in general actually an increase since a is usually obtuse.) Thus there would be a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donnan, F. G. (Frederick George), 1870-1956; Haas, Arthur Erich, 1884-1941. New Haven, Yale University Press; London, H. Milford, Oxford University Press
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