What association is names after the man Arthur König became an assistant for in 1882
Arthur König:  Born with congenital kyphosis he studied in Bonn and Heidelberg, moving to Berlin in the fall of 1879 where he studied under Hermann von Helmholtz, whose assistant he became in 1882. Hermann von Helmholtz:  The largest German association of research institutions, the Helmholtz Association, is named after him.
Helmholtz Association