1. Yale University; Department of Chemistry; New Haven Connecticut 06520
2. The Procter and Gamble Company; Miami Valley Laboratories; P. O. Box 39175 Cincinnati Ohio 45247
3. Eastman Kodak Research Laboratories; 1667 Lake Ave. Rochester New York 14650
4. Bell Telephone Laboratories; 600 Mountain Avenue Murray Hill New Jersey 07974
5. University of Rochester; Department of Chemistry; Rochester New York 14627
6. Wayne State University; Department of Chemistry; Detroit Michigan 48202