
Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1942
1952-3
1830 (original); 1967 (model)
1940
1946
1940-1945
1937
1839 (original); circa 1988 (replica)
1937
circa 1939
1940
1940-1944
1990-96
1937
1938
1945
2000-100 BCE
1938
1937
1940
1947
1945
1940
1990-95
1937
1946
1946
1940-1945
1942
1938 and 1951
1947
1943-1945
1942-1946
1943
1944
1940-1945
1946
1945
1943
1937-1938
1945
1942-1945
1943
1938
1940
1947
circa 1945
1940
1939-1945