1. Kautsky, H., de Bruijn, H., Neuwirth, R., and Baumeister, W., Ber., 66, 1588 (1933). Kautsky, H., Trans. Faraday Soc., 35, 216 (1939).
2. Lipsky, S., Ph.D. thesis, Univ. Chicago (1954). Rosenberg, J. L., and Shombert, D. J., J. Amer. Chem. Soc., 82, 3257 (1960).
3. Weiss, J., Naturwiss., 23, 610 (1935). Franck, J., and Livingston, R., J. Chem. Phys., 9, 184 (1941).
4. Weiss, J., Trans. Faraday Soc., 35, 224 (1939).
5. Scholefield, F., and Goodyear, E. H., Melliand Textilber., 10, 867 (1929). Landolt, A., ibid., 10, 533 (1929); 11, 937 (1930).