Hans Molisch expanded on Julius von Sachs's work by developing ´starch pictures´ in intact leaves by using actual photographic negatives as masks over the illuminated leaves.[2]
In his function as rector of the University of Vienna in 1926/27, Molisch was responsible for a wave of radicalization among the anti-Semitic and German-national students. The escalating violence against politically dissenters in general and Jewish students in particular was promoted by Molisch and demonstrated by appropriate leniency in punishing the perpetrators. At the university he was considered an open sponsor of the "swastika people".