Dmitri Ivanovich Mendeleev
1834 - 1907 (Petersburg)
Russian scientist. In 1886–1887 academic year Prokudin-Gorsky attended Mendeleev's lectures on chemistry in Saint Petersburg University. It's possible that he studied in Mendeleev's laboratory in the university. According to Prokudin-Gorsky, Mendeleev arranged the photographer’s first trip to Turkestan to observe a solar eclipse.