
Mirror galvanometer for the transatlantic telegraph, 1858
1858
1858
1858
1851
1857-1858
1857-1858
1837
1857-1858
1858-03-02
1830
1840
1849
1835
1855
1862
1862
1849
1846-1859
1853
1834-1844
1837
1842
1838
1850-1856
1857
1841
1839
1840-1845
1837
1831
1850-1860
1839
circa 1860
1852
1955; 1830
1830-1850
1846
1846
1844
1934
1845-1851
1844
1850-1857
1837
1843
1840-1850
1826
1849
1829-1851
1855
circa 1854