Two notebooks sent by Parrish to Kendrew at his request for the present collection. In an accompanying note of October 1986 Parrish writes: "although the imidazole derivative crystallization experiments are covered in the present books, the resultant effect on isomorphous intensity changes is not mentioned." Also covered are various efforts toward insertion of iodine and other heavy atoms, none successful. Anyway, the period covered is Sept. 1952 to May 1954 during which time we…