[166] That mercury does dissolve in water can be argued from analogy, say, with mercury and bromonaphthalene. At the ordinary temperature these two liquids appear to be quite insoluble in one another, but at a temperature of 280° the mercury dissolves in appreciable quantity; for on heating a tube containing bromonaphthalene over mercury the latter sublimes _through_ the liquid bromonaphthalene and condenses on the upper surface of the tube. [167] _Phil. Mag._, 1884, [5], 18. 22; 495. [168] _Wied. Annalen_, 1886, 28. 305. [169] _Zeitschr. physikal. Chem._, 1898, 26. 433. [170] Rothmund, _loc. cit._ [171] Rothmund, _loc. cit._ [172] A similar behaviour is found in the case of diethylamine and water (R. T. Lattey, _Phil. Mag._, 1905, [6], 10, 397). [173] C. S. Hudson, _Zeitschr. physikal. Chem._, 1904, 47. 113. [174] Konowaloff, _Wied. Annalen_, 1881, 14. 219. Ostwald, _Lehrbuch_, II. 2. 687. Bancroft, _Phase Rule_, p. 96. [175] Konowaloff, _loc. cit._ [176] Roozeboom, _Zeitschr. physikal. Chem._, 1891, 8. 526; _Rec. Trav. Chim. Pays-Bas_, 1884, 3. 38. [177] Konowaloff, _loc. cit._ Cf. Bancroft, _Phase Rule_, p. 100. [178] _Phil. Mag._, 1884 [5], 18. 503. [179] See, for example, Walker, _Introduction to Physical Chemistry_, 3rd edit., p. 86 (Macmillan, 1903). Consult also Young, _Fractional Distillation_ (Macmillan, 1903), or Kuenen, _Verdampfung und Verflüssigung von Gemischen_ (Barth, 1906), where the subject is fully treated. [180] Since this is the only phase of variable composition present. [181] E. von Stackelberg, _Zeitschr. physikal. Chem._, 1896, 20. 337. If the change of volume which accompanies solution, and the heat effect are known, the quantitative change of the solubility with the pressure can be calculated (Braun, _Zeitschr. physikal. Chem._, 1887, 1. 259). [182] Van't Hoff, _Arch. néerland._ 1901 [2], 6. 471. [183] Tilden and Shenstone, _Phil. Trans._ 1884, 175. 23; Hulett and Allen, _Jour. Amer. Chem. Soc._ 1902, 24. 667; Andreä, _Jour. prak. Chem._ 137. 474; Lumsden, _Jour. Chem. Soc._, 1902, 81. 350; Mylius and v. Wrochem, _Ber._ 1900, 33. 3689. [184] E. von Stackelberg, _Zeitschr. physikal. Chem._ 1896, 20. 159; 1898, 26. 533; Lumsden, _Jour. Chem. Soc._, 1902, 81. 350; Holsboer, _Zeitschr. physikal. Chem._, 1902, 39. 691. [185] Reicher and van Deventer, _Zeitschr. physikal. Chem._ 1890, 5. 559; cf. Ostwald, _Lehrbuch_, II. 2. 803.