File:Karl Bernhard Zoeppritz.jpg

Summary
Zoeppritz died age 26 so this picture is from no later than 1908, his year of death. As such I am assuming it is copyright-free. It is from this webpage: http://www.dgg-online.de/mitteilungen/2002_3/zoeppritz.html. It is used on the German Wikipedia page on Zoeppritz: http://de.wikipedia.org/wiki/Karl_Bernhard_Zoeppritz.