75TH ANNIVERSARY AMERICAN CHEMICAL *** SOCIETY *** CAGHET CRAFT KEN BOLL YOR SEP 4. 9-AM 1951 N. Y 1^^^^ AMERICAN CHEMICAL SOCIETY DIAMOND 1876 AAC JUBILEE 1951 AGE FIRST DAY OFISSUE Richard Davidson 117 - 01 Park Lane South Kew Gardens, 15, N.Y.