
Lord Kelvin's 'ironclad' marine galvanometer, 1865-1866
1865-1866
1865-1866
1870
1862
1858
1801-1840 (original); 1901 (model)
1866
1870s
1860
2000-100 BCE
1855
1864
1860
circa 1868
1855-1870
1870s
1861-1866
circa 1861
1865
1863-1865
1856
1861
1861
1865
1867-1868
1955; 1830
1862
1870
1866-1870
1855
1857
1858
circa 1860
circa 1861
1857-1870
1862
1867
1867
1859
1858
1855
1856
1867
1858
1855-1860
1865
1893-4
1866
1934
1857-1858
1857-1858