1888 - Born on the 23rd of January in Berlin, Germany.
1905 - He began his higher education in physics, chemistry, and mathematics at Gonville and Caius College
in Cambridge, England.
1906 - He continued his formal education at the University of Göttingen, Göttingen, Germany.
1907 - He continued his mathematical studies at the Ludwig Maximilians University of Munich, Munich, Germany.
1912 - He was granted his doctorate.
1921 - He published a paper on the theta function method of analyzing dipole fields in crystals.
1922 - He was called to the University of Münster, Münster, Germany.
1929 - He received a call to the Technische Hochschule Hanover, Germany.
1932 - He was was elected Rector at Stuttgart.
1933 - He resigned his position as a Rector at Stuttgart.
1937 - He emigrated to England and took a research position in Cambridge.
1939 - He accepted the offer as a lectureship at Queen's University Belfast, Northern Ireland.
1944 - He proposed the establishment of an International Union of Crystallography.
1946 - He was elected Chairman of the Provisional International Crystallographic Committee.
1948 - He chaired the first General Assembly and International Congress of the International Union
1949 - He moved to United States and took a position at the Polytechnic Institute of Brooklyn, New York
1952 - He was elected as a President of the American Crystallographic Association.
1957 - He served as a Vice-President of International Union of Crystallography.
- He retired as head of the Physics Department in Polytechnic Institute of Brooklyn.
1959 - He retired from teaching.
1960 - He served as a President of International Union of Crystallography.
1985 - He died on the 22nd of August in Ithaca, New York, United States.
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