Gerardus Heymans

Gerardus Heymans (1857-1930) was a famous philosopher, psychologist, a follower of Fechner's idea of psychic monism, and from 1890 to 1927 a Professor at Groningen University[?].

His student Johannes Jacobus Poortman couldn't agree with his monistic point of view and formulated the concept of hylic pluralism[?] (in Dutch hylisch pluralisme[?]).

On June 11, 1944, the Heymans-Genootschap[?], an organization for the continuation of his work, was established.