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.