He became a professor of botany and zoology at the University of Wrocław, and died on 1 March 1942 in Wroclaw, which at the time was part of Prussia.
Пакс был директором ботанического сада во Вроцлаве, профессором ботаники и зоологии Технического университета Вроцлава (Technical University of Wroclaw).