[214] Richards, Zeitschr. physikal. Chem., 1898, 26. 690. A number of other salt hydrates, having transition-points ranging from 20° to 78°, which might be used for the same purpose, have been given by Richards and Churchill, ibid., 1899, 28. 313.
[215] Zeitschr. physikal. Chem., 1903, 46. 818.
[216] Van't Hoff, Lectures on Physical Chemistry, I. p. 67.
[217] Cohen, Zeitschr. physikal. Chem., 1894, 14. 90.
[218] Ziz, Schweigger's Journal, 1815, 15. 166. See Ostwald, Lehrbuch, II. 2. 717.
[219] See, for example, the solubility determinations published in Wissenschaftliche Abhandl. der physikalisch-technischen Reichsanstalt, Vol. III., or in the Berichte, for the years 1897-1901.
[220] Meusser, Ber., 1901, 34. 2440.
[221] Mylius and von Wrochem, Ber., 1900, 33. 3693.
[222] Walker and Fyffe, Jour. Chem. Soc., 1903, 83. 180.
[223] Monatshefte, 1887, 8. 601.