[390] Zeitschr. für Kristallographie, 1904, 39. 155.
[391] Meyerhoffer and Saunders, Zeitschr. physikal. Chem., 1899, 28. 479.
[392] Zeitschr. physikal. Chem., 1904, 49. 162.
[393] Another commercial process, in the study of which good service is done by the Phase Rule, is the caustification of the alkali salts (G. Bodländer, Zeitschr. für Elektrochem., 1905, 11. 186; J. Herold, ibid., 418).
[394] Zeitschr. physikal. Chem., 1900, 35. 32.
[395] Mention may also be made here of the equilibria between magnesium carbonate and potassium carbonate, although these do not form a reciprocal salt-pair (Auerbach, Zeitschr. für Elektrochem., 1904, 10. 161).
[396] O. N. Witt and K. Ludwig, Ber., 1903, 36. 4384; Meyerhoffer, ibid., 1904, 37. 261, 1116.
[397] Zeitschr. physikal. Chem., 1905, 53. 513. Compare also, ibid., 1903, 38. 307.
[398] See Schwarz, Beiträge zur Kenntnis der umkehrbaren Umwandlungen polymorpher Korper (Göttingen, 1892); or, Roozeboom, Heterogen. Gleichgewicht, I. p. 125. Also Barnes and Cooke, Journ. Physical Chem., 1902, 6. 172.
[399] Van't Hoff and van Deventer, Zeitschr. physikal. Chem., 1887, 1. 173.