1 map: col.; "The black line indicates the sectional represented in the vertical section of Plate XVI." - included in the thesis text for Plate XV.; 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; Life zone map of Crater Lake National, plate XVII accompanies thesis: Life zones with special reference to the botanical features of those of Crater Lake National Park.