Bohuslav Brauner

Bohuslav Brauner (May 8, 1855 – February 15, 1935) was a Czech chemist.

Brauner was a student of Robert Bunsen at the University of Heidelberg and later of Henry Roscoe at the University of Manchester. Brauner became lecturer for chemistry at the University of Prague in 1883 and professor in 1890. He worked on the chemistry of the lanthanides, and in 1902 proposed that an element was missing between neodymium and samarium; it was later found to be promethium. Brauner's conflict with Carl Auer von Welsbach about the priority for the discovery that didymium is a mixture of two elements (praseodymium and neodymium) was harsh. However, in the end Brauner withdrew his claims for unknown reasons.

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Bohuslav

Bohuslav (Cyrillic: Богуслав) is a city of district significance on the Ros River in Kiev Oblast (province) of Ukraine. It is the administrative centre of Bohuslav Raion. Population: 16,825 (2013 est.). The population in 2001 was 17,135.

It is known as Boslov by some of its Yiddish speaking residents and Boguslav (by the Russophones). Prominent Americans who trace their family roots to Bohuslav include the late Congressman Herman Toll (1907–1967), who emigrated from the region with his family around 1910, and his nephews Robert (Bob) and Bruce Toll, founders of publicly traded homebuilder Toll Brothers.

Brief description

The city's year of establishment and source of name is uncertain. It is mentioned by Hypatian Codex as earlier as 1032 which is assumed as the year of establishment. In official documents it is mentioned as earlier as 1195 when Bohuslavl was handed over by the Grand Prince of Kiev Rurik II to the Grand Prince of Vladimir-Suzdal Vsevolod III who preceded him on Kievan throne several years earlier.