1927

for his discovery of the effect named after him

for his method of making the paths of electrically charged particles visible by condensation of vapour

for his investigations of the constitution of the bile acids and related substances

for his discovery of the therapeutic value of malaria inoculation in the treatment of dementia paralytica

in recognition of his rich and vitalizing ideas and the brilliant skill with which they have been presented

for their contribution to the emergence in France and Germany of a public opinion which favours peaceful international cooperation

for their contribution to the emergence in France and Germany of a public opinion which favours peaceful international cooperation