Hertzian oscillator, 1890-1894
1890-1894
1890-1894
1895
1895
1896
2000-100 BCE
1893-4
About 1890
1894
1890-1894
1890-1896
1892
1934
1890-1894
circa 1890
circa 1890
circa 1890
circa 1890
1897
1890
1896
1890
1896
1872 (original); 1909 (model)
1955; 1830
1890
1892
circa 1890
circa 1890
circa 1890
1896
1891
1890-1897
1897
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1894
1897
1897
1897
1930 (replica); 1834 (original)
1897
1897
1897
1893
1897
1986 (replica); 1501-1600 (original)
1890
1894
1934