
Crick and Watson's DNA Molecular Model
1953
1953
1953
1949
1934
1918-1920
1948-1953
1918
1920-1950
1935
1942
1950-1952
1920-1925
1945-1955
1952-3
1920-1950
1945
1951
circa 1956
1940
1830 (original); 1967 (model)
1925-1935
circa 1919
1915-1925
1925-1935
1955
1919
1928
1957
1923
1946-1950
1940
1923
1920-1950
1920-1950
1940-1950
1948-1950
1935
1911
1927
1955
1917
1954
1953
1936
1956
1946
1926
1925-1958
1956
1951-1953