
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
1865-1866
1848-1852
1854
1858
1865
1893-4
1851
1866
1934
1857-1858
1857-1858
1857-1858
1860
1858-03-02
1851
1852
1849
1862
1848
1858
2000-100 BCE
1861-1866
1870s
1857-1870
1864
1856
1867
1850-1870
1855-1860
1850-1870
1863-7
1850-1857
1855
1860
1860-1870
1856
1855
1852
1865
1860
1860
1855
circa 1854
1870
1858-1866
1868
1772 (original); 1919 (model)
1857
1870
1855-1865