
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1934
1940
1951
1839 (original); circa 1988 (replica)
1923
1947
1935
1950
1950
1935
1948
1946
1951
1943
1948
1931
1930
circa 1930
circa 1942
1925
1928
1952
1954
1952
1954
1952
1954
1952
1923-1939
1945
1951
1927
1947
1924
circa 1930
1951
circa 1950
1935
1940
circa 1938
1938
1953
1938
1937
1931
1954
1949