=America, the History of Its Discovery.= 2 vols., with 545
illustrations and 37 maps. (Leipzig 1890–92.) Award World’s
Columbian Exposition.
=America, historia de su descubrimiento.= 3 vols., with several
hundred illustrations and maps. (Barcelona 1892.) Award World’s
Columbian Exposition.
=From Wonderland to Wonderland, Sketches of American Life and
Scenery.= With 50 heliogravures. (Leipzig 1886.)
=Through the Wild West=, Journeys of an Artist through the Prairies
and Rocky Mountains of America. Illustrated. (Braunschweig 1890.)
=Travels in the Land of the Sioux Indians.= (Leipzig 1886.)
=Our Wasteful Nation; the Story of American Prodigality and the Abuse
of Our National Resources.= Illustrated. (New York 1908.)
=Three Centuries of German Life in the United States=, with 210
illustrations. (Berlin 1909.) Award by the University of Chicago.
=Illustrative Cloud Forms for the Guidance of Observers in the
Classification of Clouds.= (U. S. Publication No. 112. Washington,
D. C., 1897.)