Passage: Favorsky studied chemistry at the imperial University of Saint Petersburg from 1878 to 1882. He joined Alexander Butlerov's laboratory for several years, and in 1891 became a lecturer. In 1895, Favorksy received his PhD and became professor for technical chemistry. His discovery of the Favorskii rearrangement in 1894 and the Favorskii reaction between 1900 and 1905 are connected to his name. He worked at the new organics department from 1897, and served as its director from 1934 to 1937.  For his improvement of the production of synthetic rubber, Favorsky was awarded the Stalin Prize in 1941.

Question: what year did favorsky get his PhD?
1895,