
Crick and Watson's DNA Molecular Model
1953
1953
circa 1925
1920-1950
1948-1953
1918-1920
1918
1949
1919
1935
1920-1950
1934
1920-1925
1920-1950
1945
1920-1950
1942
1923
1915-1918
1952-3
1951
1953
1917
1953
1949
1914-1918
1920-1950
1830 (original); 1967 (model)
1948-1950
1935
1948-1953
circa 1910
1940
1950-1952
1935
1907
1913
1925
1936
1920-1950
1946
1930-1940
1934
1920-1930
1935-1945
1946-1950
circa 1915
1925-1935
1923
1940-1945
1927