Letter from Howard Walter Florey to Henry Dale, National Institute of Medical Research, Hampstead Thanks Dale for letter and for curarine - comments on report at the Mayo Clinic finding that experimental shock can be put off for 10 and a half hours by giving animals barbiturate - feels the nervous system is in some way involved at least in the early stages of severe shock - Denny Brown is getting interesting results in cats by blows on the head and claims to be able to differentiate between concussion and shock produced by this means. 25 October 1940