
Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1839 (original); circa 1988 (replica)
1945
1945
1955; 1830
1944
1938 and 1951
1944-1945
2000-100 BCE
1990-96
1952-3
1801-1892 (prepared); 1946 (element replaced)
1944
4000-2001 BCE
1903 (original); 1982 (model)
1830 (original); 1967 (model)
circa 1945
1990-95
1888; 1984
2050-1750 BCE
1944
1879 (1956)
1960-1979
6000-5000BCE
1985-11
1979-80
1945
1945
1945
1945
30 CE
30 CE
1944
2686-2613 BCE
1859; 1986
before 1944
1945-50
1945
1945
20-400
1944
1945
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
30-200
2000-1350