
Filings coherer, Lodge-Muirhead system, 1900-1910
1900-1910
1900-1910
1902-1907
1900-1910
1900
2000-100 BCE
1901-1911
1901-1911
1900-1909
1902
1901
1910
1907
1907
1900
1900
circa 1900
1801-1892 (prepared); 1946 (element replaced)
1904
1911
1930 (replica); 1834 (original)
circa 1900
1905
1903
1901
1901
1990-96
1903
1900-1910
1903
1907
1901
1901
1830 (original); 1967 (model)
1909-1910
1908
circa 1900
1901-1911
1905
1899
1902
1772 (original); 1919 (model)
1900-1911
1900-1910
1934
1901
1900-1910
1705-1737
1910
1775-1799 (original); 1900-1907 (model)
1801-1840 (original); 1901 (model)