
Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1942
1943
1945
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1940
1952-3
1938
1947
1938
1948
1938
1938
1940
1940
1938
1938
1940-1945
1945
1948
1946
1943
1948
1955; 1830
1938 and 1951
1944-1945
1940-1944
1943
1942
1948
1942
1937
1946
1937
1944
circa 1942
1939
1946-1948
1946
2000-100 BCE
1938-1940
1937-1937
1937-1938
1937-1938
1939-1945
1946
1948
1940
1947