Ampoule of penicillin
1945
1945
1946
1950-1951
1946
1948
1946
1948
1947
1950
1951
1950
1951
1945
circa 1950
1946
1949
1947
circa 1950
1950
1951
1948
1951
1950
1951
1948
1955; 1830
1945
1949
2000-100 BCE
1946
1938 and 1951
1946-1948
1948
1951
1945-1948
circa 1950
circa 1950
1951
1948
1951
1951
1951
1990-96
1950
1949
1950
1948
1801-1892 (prepared); 1946 (element replaced)
1946-1948
1948