Sir Henry Hallett Dale, OM, GBE, PRS (9 June 1875 – 23 July 1968) was an English pharmacologist and physiologist.For his study of acetylcholine as agent in the chemical transmission of nerve impulses (neurotransmission) he shared the 1936 Nobel Prize in Physiology or Medicine with Otto Loewi.lso in 1903, Dale assisted Ernest Starling and William Bayliss in the vivisection of a dog, by removing the dog's pancreas and then killing the dog with a knife, which ultimately led to the events of the Brown Dog affair. Dale received his M.D. from Cambridge in 1909.