
Iron borings coherer (Branly type), 1894
1894
1894
1853-1857
1894-1904
1902
1889
1908
1904
1873
1885-1895
1871-1900
1851-1900
1860-1900
1863-1880
1881-1900
1860-1905
1869-1900
1904
1900
1851-1900
1871-1900
1850-1900
1901-1905
1860-1900
1879-1896
1890-1900
1872
1851-1900
1862-1900
1895-1905
1896-1900
1870-1880
1860-1880
1875-1878
1865-1877
1881-1900
1866-1870
1876-1900
1903
1890-1900
1890-1900
4000-2001 BCE
1878
1856
1897
1897
circa 1860
1903 (original); 1982 (model)
1897
1901
1862