William Thomson, 1st Baron Kelvin William Thomson, 1st Baron Kelvin William Thomson, 1st Baron Kelvin, (26 June 1824 – 17 December 1907) was a Scots-Irish mathematical physicist and engineer who was born in Belfast in 1824. At the University of Glasgow he did important work in the mathematical analysis of electricity and formulation of the first and second laws of thermodynamics, and did much to unify the emerging discipline of physics in its modern form. He worked closely with mathematics professor Hugh Blackburn in his work. He also had a career as an electric telegraph engineer and inventor, which propelled him into the public eye
19th century in ichnology "giant" trackmaker was recognized by paleontologists Joseph Le Conte and Othniel Charles Marsh as a giant ground sloth, possibly of the genus "Mylodon". 1802 1820s Late 1820s 1828 1831 1834 1835 1836 1842 1843 1845 1846 1847 1848 1850 1851 1852 1854 1858 1860 1862 1864 1865 1877 1879 1880 1884 1886 1889 [[:Category:1890s in paleontology|1890s]] [[1894 in paleontology|1894]] [[1895 in paleontology|1895]] [[Category:19th century in paleontology]] [[Category:Ichnology]] [[Category:Paleontology timelines|Ichnology]] 19th century in ichnology The 19th century in ichnology refers to advances made between the years 1800 and 1899 in the scientific study of trace fossils, the preserved record of the