Physics
Gustaf Dalén
“for his invention of automatic regulators for use in conjunction with gas accumulators for illuminating lighthouses and buoys”
Chemistry
Victor Grignard
“for the discovery of the so-called Grignard reagent, which in recent years has greatly advanced the progress of organic chemistry”
Paul Sabatier
“for his method of hydrogenating organic compounds in the presence of finely disintegrated metals whereby the progress of organic chemistry has been greatly advanced in recent years”
Physiology or Medicine
Alexis Carrel
“in recognition of his work on vascular suture and the transplantation of blood vessels and organs”
Literature
Gerhart Hauptmann
“primarily in recognition of his fruitful, varied and outstanding production in the realm of dramatic art”
Peace
Elihu Root
“for bringing about better understanding between the countries of North and South America and initiating important arbitration agreements between the United States and other countries”