
Model of Henry Cavendish's Torsion Balance Gravitational Apparatus, 1798
1798 (original); 1977 (model)
1798 (original); 1977 (model)
circa 2007
Unknown
1945-1950
1968-1972
2005
1958
1977
1800-1900
1968-72
1873-1876
1765
1956
1960-1980
1940-1945
1890-1910
1956
1910-1950
1923-1939
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868