
Crick and Watson's DNA Molecular Model
1953
1953
1953
1934
1935
1951
1948-1953
1950-1952
1936
1935
1942
1951-1953
1949
1948-1950
1950
1953
1953
1945
1936
1946
1948
1946-1950
1940
1949
1839 (original); circa 1988 (replica)
1943
1940-1945
1936-1948
1930-1950
1936
circa 1939
1935-1945
1948-1953
1940-1950
1948
1946
1943
1948
1934
1950
1938
1938
1950
1935
1951
1930
1930-1940
circa 1942
1952
1952
1952