Per Teodor Cleve 1840–1905 Source: Wikimedia Commons About Per Teodor Cleve Swedish chemist who discovered holmium and thulium (1840-1905) People from the Same Era Ludwig Enneccerus 1843–1928 jurist, legal historian, politician, university teacher Neustadt am Rübenberge Stepan Leonov 1834–1899 military officer Russia János Greguss 1837–1892 draftsperson, graphic artist, illustrator, painter, teacher Bratislava Friedrich von Medicus 1847–1904 politician Karlstadt am Main Viktor Dmitrovsky 1834–1902 military personnel John W. Barlow 1838–1914 explorer, military personnel Perry