| Description | Says letters delayed in censors department - makes close cooperation farcical when long delays - discusses Chain's experiment with ground mycelium - Squibb prepared to provide stuff for clinical trials but not for chemical work - possibility of cooperation by Merck and Squibb - conditions under which he will be working at Merck reasonable - discusses publication of Peoria work - Rake says he thinks that nine firms are trying to cooperate on the penicillin problem. |