1930

for his work on the scattering of light and for the discovery of the effect named after him

for his researches into the constitution of haemin and chlorophyll and especially for his synthesis of haemin

for his discovery of human blood groups

for his vigorous and graphic art of description and his ability to create, with wit and humour, new types of characters

for promoting Christian unity and helping create 'that new attitude of mind which is necessary if peace between nations is to become reality'