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