1. Jour. Chem. Soc, 1923,123, 1841.
2. Zeits. f. Phys., 1926,38, 61.
3. Zeits. f. Phys. Chem., 1926,122, 414.
4. Jour. Sci. Instruments, 1935,12, 260.
5. Jour. de Chim. Phys., 1935,32, 353; and previous papers. See alsoTables Annuelles de Constantes, Paris, 1930.