Penicillin powder in bottle
1942
1942
1940
1940
1940
1942
1940
1955; 1830
2000-100 BCE
1938 and 1951
1942
1940
1940
1903 (original); 1982 (model)
circa 1940
1990-96
1940
1940
1830 (original); 1967 (model)
4000-2001 BCE
1801-1892 (prepared); 1946 (element replaced)
1942
1940
1942
1940
1942
1942
1962-05
circa 1940s
1942
1942
1942
1942
1941
1940
1940
1970-1900
1941
10000-5000 BCE
1942
post 1941
1940
1942
1940
1940
circa 1941
circa 1941
circa 1941
1940
1917
circa 1940