Ring transformer, 1892
1892
1892
1934
1872 (original); 1909 (model)
1955; 1830
1894
2000-100 BCE
1893-4
1892
1775-1799 (original); 1900-1907 (model)
1990-96
1893
1894
1934
1705-1737
1894
1894
1893
1894
1772 (original); 1919 (model)
1930 (replica); 1834 (original)
1894
1894
1801-1840 (original); 1901 (model)
4000-2001 BCE
1830 (original); 1967 (model)
1801-1892 (prepared); 1946 (element replaced)
circa 1893
circa 1893
circa 1893
circa 1893
1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893