<Li> Campbell Leonard (1907--1973) </Li> <Tr> <Th> Relatives </Th> <Td> Harold MacPherson (brother) </Td> </Tr> <P> Cluny Macpherson CMG FRCS (March 18, 1879--November 16, 1966) was a physician and the inventor an early gas mask . After World War I he served as the president of the St. John's Clinical Society and the Newfoundland Medical Association . </P> <P> Macpherson was born in St. John's, Newfoundland to Campbell Macpherson and Emma Duder . He had a brother, Harold . </P>

Who invented the gas mask in world war 1