
Filings coherer, glass tube almost of taper shape, 1894-1904
1894-1904
1894-1904
1893-4
1899
1890-1896
1894-1904
1894-1904
1890-1894
1899-1901
1894-1904
1934
1894-1904
1894-1904
1894-1904
1898
1894-1904
1900
1892
1897
1890 - 1900
1906
2000-100 BCE
1890-1900
1891-1900
1902
1890-1899
1872 (original); 1909 (model)
1892
1888
1890
1898
1890
1899
1905
1896
1901
1889
circa 1900
1890-1894
1900
1890-1894
1904
1899
1901
1901
1899
1896
1901
1897
1900
circa 1900