1 map: col.; "Legend: Hudsonian, Canadian, Transition." - included in the thesis text for Plate XVII; Relief shown by contours and spot heights. Depths shown by bathymetric soundings (in feet) by Mark B. Kerr in 1886; Base map: Crater Lake National Park, Oregon, U.S. Geological Survey, 1911 repr. 1925; "Contour interval 50 feet."; Geographers, R.B. Marshall and T.G. Gerdine. Topography by Pearson Chapman; Map accompanies thesis: Life zones with special reference to the botanical features of those of Crater Lake National Park; Topographic map of Crater Lake National Park, plate XV accompanies thesis: Life zones with special reference to the botanical features of those of Crater Lake National Park.