
Penicillin powder in bottle
1942
1942
1937-1938
2000-100 BCE
1940
1938
1940
1938
1938
1935
1938
1935
1938
1940
1942
1938-1940
1935
1940
1936
1937-1937
1935
1938
1938
1955; 1830
1937-1938
circa 1938
1935
1935
1937
1938
1942
1936
1937
circa 1942
1936
1939
1935
1935
1936
1938 and 1951
1939
1839 (original); circa 1988 (replica)
1938
1940
1937
1936
1935
1937
1937
1938
1935