CONTENTS. 7 



Chaptek III. — Drainage systems — Continued. Page. 

 Section I. — Oliio River system — Continued. 



Scioto River — Continued. 



Western tributaries south of the glacial boundary 177 



Beaver Creek 178 



Salt Creek 178 



Little Miami River 180 



Rate of fall 180 



Changes in drainage _ 180 



Great Miami River 182 



The present system 182 



Changes in drainage 183 



Whitewater River _ _ 184 



The present system 184 



Changes in drainage 185 



Tributaries of the Ohio in Indiana 185 



Wabash River system 186 



Wabash River. 187 



Salamonie River 189 



Mississinawa River ' 190 



Eel River 190 



Tippecanoe River I91 



West White River I9I 



East White River I93 



Patoka River I95 



Western tributaries of the Wabash in Illinois 196 



Causes of changes in drainage 196 



Glaciation 196 



Piracy. . .' ; 198 



Earth movements 199 



Section II. St. Lawrence system ". _ _ _ 200 



Genesee drainage basin 201 



Genesee River ». 201 



Genesee glacial lakes 204 



Morainal lakes 206 



Changes of drainage on the tributaries 207 



Minor tributaries of Lake Ontario in western New York 209 



Tonawanda Creek 210 



Tributaries of Lake Erie 211 



Buffalo Creek 211 



Eighteenmile Creek 212 



Cattaraugus Creek 212 



Small tributaries between Cattaraugus and Conneaut creeks 213 



Conneaut Creek 214 



Ashtabula Creek '. 215 



Grand River 215 



Chagrin River 215 



Cuyahoga River 216 



Rocky River 216 



Black River 217 



Vermilion River 217 



Huron River 217 



Sandusky River 218 



Maumee River 218 



Chapter IV. — The drift bokdee or glacial boundary 220 



Section I. The border of the oldest drift (Kansan or pre-Kansan) _ 220 



