English: This is an unusual 1838 statistical chart by H. Berghaus. Offers a wealth of statistical information on the Rhine, Elbe, and Oder Rivers. Published as part of Berghaus's, Physikalischer Atlas ,
File:1838 Perthes Chart of the Rhine, Elbe, and Order Rivers - Geographicus - RheinElbeOder-perthes-1838.jpg - Wikimedia Commons