Henry Hallett Dale, English pharmacologist and physiologist, Nobel Prize laureate (d. 1968)
Sir Henry Hallett Dale (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 pulses (neurotransmission) he shared the 1936 Nobel Prize in Physiology or Medicine with Otto Loewi.