
Thomson's mirror marine galvanometer, 1858
1858
1858
circa 1861
1862
1858
1830 (original); 1967 (model)
1854
circa 1861
1859
1858
1858
1860
1862
1855
1854
1858-03-02
1860
1955; 1830
1856
1861
1861
1934
1858
circa 1860
1857-1858
1855
1856
1893-4
1863-7
2000-100 BCE
1857
1855-1860
1857-1858
1857-1858
1857
1860
1705-1737
1858
1856
1859
1856-1857
1855
1934
1854
1839 (original); circa 1988 (replica)
1860
circa 1860
1857
1857
1870-1877
1855