Cylinder electrostatic machine complete with friction pad and prime conductor all on one base
1850-1899
1850-1899
1880-1910
1920-1940
1895-1905
1892-1924
1780
1915-1925
1920-1940
1780-1798
1864-1930
1801-1820
1845-1855
1895-1910
1938
1884-1888
1891-1909
1851-1856
1884-1891