medicine at the universities of Heidelberg and Bonn ;
Germany
Johannes Peter Müller (1801-1858) ; Henle: Handbuch der systematischen Anatomie (1866-71) ; Über Narcine ... (Berlin 1934) ; Samuel Howitt (c. 1765-1822) ;
Samuel Thomas von Sömmering ;
anatomical, physiological, and zoological drawing ;