1. 1) Presented at the Annual Local Meeting of the Chemical Society of Japan in Sendai, June 30, 1952.
2. 2) J. W. Cook, J. D. Loudon, and D. K. V. Steel: Chem. & Ind., 669 (1951).
3. 3) T. Nozoe, S. Seto, S. Itô, and M. Satô: Proc. Japan Acad., 27, 426 (1951).
4. 4) T. Nozoe, Y. Kitahara, K. Yamane, and T. Ikemi: Proc. Japan Acad., 27, 193 (1951).
5. 5) T. Nozoe, S. Ebine, S. Itô, and A. Konisbi: Proc. Japan Acad., 27, 10 (1951).