Letter from Howard Walter Florey to Leonard Colebrook, Basingstoke Chalmers can probably get two autoclaves - should enable them to deal with an increased output of penicillin - can Colebrook get them some extra labour from the War Office - suggests methods of application for penicillin in watery solution - gives details of two experiments with cetyl compound - might be useful to those using baths for burns. 8 January 1942