[317] G. G. Stokes, _Proc. Roy. Soc._, 1891, 49. 174; Gibbs, _Trans. Conn. Acad._, 1876, 3. 176; Roozeboom, _Zeitschr. physikal. Chem._, 1894, 15. 147. [318] This figure has been taken from Ostwald's _Lehrbuch_, II. 2. 984. [319] Roozeboom, _Zeitschr. physikal. Chem._, 1893, 12. 369. [320] C. R. A. Wright, _Proc. Roy. Soc._, 1891, 49. 174; 1892, 50. 375. [321] The distribution coefficient will not remain constant because, apart from other reasons, the mutual solubility of chloroform and water is altered by the addition of the acid. [322] Bancroft, _Physical Review_, 1895, 3. 21; Schreinemakers, _Zeitschr. physikal. Chem._, 1897, 23. 652, and subsequent volumes. [323] C. R. A. Wright, _Proc. Roy. Soc._, 1889-1893. [324] C. R. A. Wright, _Proc. Roy. Soc._, 1892, 50. 390. [325] Bodländer, _Berg- und Hüttenmänn. Ztg._, 1897, 56. 331. [326] C. R. A. Wright, _Proc. Roy. Soc._, _loc. cit._ [327] Schreinemakers, _Zeitschr. physikal. Chem._, 1900, 33. 78. [328] Schreinemakers, _Zeitschr. physikal. Chem._, 1898, 27. 95. [329] Schreinemakers, _Zeitschr. physikal. Chem._, 1899, 29. 577. [330] Schreinemakers, _Zeitschr. physikal. Chem._, 1898, 25. 543. [331] Charpy, _Compt. rend._, 1898, 126. 1569. Compare the curves for the system KNO_{3}--NaNO_{3}--LiNO_{3} (H. R. Carveth, _Journ. Physical Chem._, 1898, 2. 209). Also alloys of Pb--Sn--Bi (E. S. Shepherd, _Journ. Physical Chem._, 1902, 6. 527). [332] It should be remembered that in the triangular diagram a _line_ parallel to one of the sides indicates, at a given temperature, a constant amount of the component represented by the opposite corner of the triangle; and, hence, points in a _plane_, parallel to one face of a right prism, will indicate for different temperatures, variation in the amounts of two components, but constancy in the amount of the third. [333] _Gazzetta chim. ital._, 1898, 28. II. 520. [334] Bruni, _Gazzetta chim. ital._, 1898, 28. II. 508; 1900, 30. I. 35. [335] _Zeitschr. physikal. Chem._, 1900, 36. 168. [336] For a discussion of these systems, see van't Hoff, _Bildung und Spaltung von Doppelsalzen_ (Leipzig, 1897). [337] Van Leeuwen, _Zeitschr. physikal. Chem._, 1897, 23. 35. [338] Meyerhoffer, _Zeitschr. physikal. Chem._, 1889, 3. 336; 1890, 5. 97. [339] Reicher, _Zeitschr. physikal. Chem._, 1887, 1. 220. [340] For other examples of the formation and decomposition of double salts at a transition point, the reader is referred to the work by van't Hoff, already cited, on the _Bildung und Spaltung von Doppelsalzen_; or to Bancroft, _Phase Rule_, p. 180. [341] Bancroft, _Phase Rule_, p. 183. [342] Roozeboom, _Zeitschr. physikal. Chem._, 1888, 2. 514.