Ampoule of penicillin
1945
1945
1946
1950-1951
1948
1946
1943
1948
1947
1940
1951
1945
1946
1949
1947
1940
1951
1950-1952
1939-1945
1944-1945
1946
1948
1940-1945
1940-1949
1939
circa 1950
1940
1951
1944
1951
1946-1948
1943
1948
1950
1940-1944
2000-100 BCE
1938 and 1951
1948
1940
1942
1941-1950
1950
1950
1951
1951
1955; 1830
circa 1950
1950
1945
1949
1942