![](https://coimages.sciencemuseumgroup.org.uk/26/493/large_thumbnail_1876_0040.jpg)
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
1865-1866
1865
1866
1865
1867
1867
2000-100 BCE
1893-4
1865
1864
circa 1868
1934
1867
1867-1868
1955; 1830
1869
1990-96
1867
1865
1930 (replica); 1834 (original)
1865-1866
1868
1839 (original); circa 1988 (replica)
4000-2001 BCE
1705-1737
1865
1866
1864
1869
1870-1877
1934
1888
1865
1772 (original); 1919 (model)
1830 (original); 1967 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1865
1868
1868
1867
1825; 1910
1865
1868
1869
1868
1867
1864
1868
30 CE