Achievements Zawidzki was a professor of the Akademia Rolnicza in Dublany (1907–1916), Jagiellonian University (1916–1917), University of Warsaw (1917–1928), rector of the University of Warsaw (1918–1919), member of the Academy of Learning (since 1918), co-founder of the Polskie Towarzystwo Chemiczne and magazine Roczniki Chemii.