
Penicillin powder in bottle
1942
1942
1943
1937-1938
1940-1944
2000-100 BCE
1940
1938
1940
1938
1938
1938
1938
1940
1942
1938-1940
1940
1936
1937-1937
1938
1938
1955; 1830
1937-1938
circa 1938
1943
1937
1938
1942
1936
1937
1944
circa 1942
1936
1939
1936
1938 and 1951
1939
1839 (original); circa 1988 (replica)
1938
1940
1937
1936
1937
1937
1938
1936
1801-1892 (prepared); 1946 (element replaced)
1940
1830 (original); 1967 (model)
circa 1940
4000-2001 BCE