REPORT OP COMMITTEE ON PHOTOGRAPHS 475 



1821 (5). Kansan-loess topography, showing even sky line and spatulate valleys. 



Dixon, Scott county, Iowa. On farm of Ketelson. Iowa Geological 

 Survey, volume ix. 



1822 (6). Steffen's quarry, Cleona township, Scott county, Iowa. Pitted rock 



surface beneath Kansan drift. False bedding of Leclaire limestone. 

 Iowa Geological Survey, volume ix. 



1823 (7). Illinoian topography. North of Buffalo, Scott county, Iowa. Showing 



tabular divides on initial drift plain and miners sinking shaft for coal. 

 Iowa Geological Survey, volume ix. 

 1821 (8). Topography of lowan drift sheet. Drift plain with boulder and paha 

 hills, near Lowden, Cedar county, Iowa. 



1825 (9). From chapel tower of Cornell College, looking north-northeast. lowan 



drift plain with paha ridges in distance. Mechanicsville sheet, topo- 

 graphical atlas, United States Geological Survey. 



1826 (10). Paha north of Aliens Grove, Scott county, Iowa, looking north. Dav- 



enport sheet, topographical atlas. United States Geological Survey ; 

 Iowa Geological Survey, volume ix. 



1827 (11). The Stan wood paha, showing marshy ground which surrounds it. 



Eleventh Annual Report, United States Geological Survey, page 404 ; 

 Tipton sheet, topographical atlas. United States Geological Survey. 



1828 (11«). Stanwood paha, looking north. Eleventh Annual Report, United States 



Geological Survey, page 404 ; Tipton sheet, topographical atlas, United 

 States Geological Survey. 



1829 (12). Mount Vernon paha from south. Iowa Geological Survey, volume iv, 



pages 181-184. 



1830 (13). Paha between Mount Vernon and Lisbon, Iowa. 



1831 (14). Gallegher paha, northeast of Long Grove, lowan frontier, Scott county. 



Hummocks of loess and sand, with pahoid orientation. Iowa Geo- 

 logical Survey, volume ix ; Davenport sheet, topographical atlas. 

 United States Geological Survey. 



1832 (15). Sandhills, lowan frontier, northwest of Princeton, Scott county, Iowa. 



Iowa Geological Survey, volume ix. 



1833 (16). Pond among sandhills of lowan frontier, Princeton township, Scott 



county. Iowa Geological Survey, volume ix. 



1834 (17). Erosion gullies in loess mantle on Illinoian drift sheet, Princeton town- 



ship, Scott county. Iowa Geological Survey, volume ix. 



1835 (18). Vertical cleavage of loess, Bielers quarry. Cedar valley, Iowa. 



1836 (19). Swallows' nests in loess, Clinton, Iowa. 



1837 (20). Lingulate lobes of heavy loess near lowan frontier, northwest of Prince- 



ton, Scott county, Iowa. Iowa Geological Survey, volume ix. 



1838 (21). Gorge of Wapsipinicon, northeast of Dixon, vScott county, Iowa. Iowa 



Geological Survey, volume ix. 



1839 (22). Gorge of Wapsipinicon, southeast of Big Rock, Scott county. Iowa 



Geological Survey, volume ix. 



1840 (23). View across wide floodplain of Wapsipinicon valley below gorge shown 



in No. — , looking north. Leclaire atlas sheet. United States Geo- 

 logical Survey. Geology of Scott county, volume ix, Iowa Geological 

 Survey. 



