
Crick and Watson's DNA Molecular Model
1953
1953
1953
1956
1948-1953
1955
1934
1940
1951
1839 (original); circa 1988 (replica)
1947
1935
circa 1955
1950
1950
1935
1948
1946
1955
1955
1951
1943
1948
circa 1955
circa 1942
1956
1952
1954
1952
1954
1952
1954
1956
1956
1952
1945
1951
1955
1947
1951
1945-1955
circa 1950
1955
1935
1940
circa 1938
1938
1953
1938
1937
1954