
Crick and Watson's DNA Molecular Model
1953
1953
1953
1918
1920-1950
1920-1925
1934
1919
1923
circa 1956-1959
1955
1948-1953
1920-1950
1920-1950
1951
1949
1931
1917
1951
1942
1956
1925-1958
1946
1959
1918-1920
1948-1953
1955
1930-1931
1957
1938-1940
1945
circa 1920
1948-1950
1839 (original); circa 1988 (replica)
1936
1949
1935
1945-1955
1925-1935
1920-1950
1830 (original); 1967 (model)
1903 (original); 1982 (model)
1990-96
1943
circa 1956
1934-1935
1950
1938
1920
1947
1938