Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1839 (original); circa 1988 (replica)
1990-96
1942
1943
1943-1945
1938 and 1951
1903 (original); 1982 (model)
1947
1945
1947
1946
2000-100 BCE
1943
1946
4000-2001 BCE
1942
1955; 1830
1945
1946
1943
1943
1944
1942-1945
circa 1945
1945-1946
1942
1945
1947
1942
1946
1942
1946
1945
1942-1945
1941
1946
1934; 1947
circa 1942
1944
1946
1947
1944-1945
1947
circa 1946
circa 1947
1952-3
1944
1990-95
1945