The prize for the yeav 1920 was awarded to: 
GUILLAUME, CHARLES EDOUARD, director of the 
Bureau International des Poids et Mesures, 
Sevres, born 1861, died 13th June, 1938; “in 
recognition of his sevvices lo the physics of preci- 
ston, by his discovery of anomalies in nickel steel 
allovs.”’ 
The prize for the year 1921 was awarded in Ig22 to: 
EINSTEIN, ALBERT, professor, Berlin, born 1879. The 
prize was awarded to Einstein independently of 
such value as may be ultimately attached to his 
theories of relativity and gravity, if these are 
confirmed, “for his services to the theory of phys- 
ics, and especially for his discovery of the law of 
the photo-electric effect.” 
The prize for the year 1922 was awarded to: 
Bourg, NikLs, professor of physics at the University 
of Copenhagen, born 188s; “for his services in 
the investigation of the structure of atoms, and of 
the radiation emanating from them.” 
The prize for the year 1923 was awarded io: 
MILLIKAN, ROBERT ANDREWS, professor at Pasadena, 
Cal., U. S. A., born 1886; “for his works on the 
elementary charge of electricity, and om photo- 
electric phenomena.” 
The prize for the year 1924 was awarded in 1925 to: 
SIEGBAHN, KARL MANNE GEORG, professor of physics 
at the University of Upsala, born 1886; “for his 
discoveries and investigations in X-ray spectyo- 
scopy.” 
The prize for the vear 1025 was divided equally in 1926 
between: 
FRANCK, JAMES, professor of physics at the Univer- 
sity of Gottingen, born 1882; and 
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