GLACIAL DAMS, LAKES, AND WATERFALLS. 367 



cial boundary through Pennsylvania, I continued the work 

 through the State of Ohio, and traced the line at length to 

 the Ohio River, near Ripley, about sixty miles above Cincin- 

 nati. From this point, for about thirty miles down the river, 

 to the vicinity of New Richmond, the glacial boundary lies 

 upon the north bank of its trough ; till, bowlders, and 

 scratched stones being found on the highlands down to the 

 extreme margin on the north side, but being absent from 

 the corresponding highlands on the Kentucky side. Near 

 Point Pleasant, the birthplace of President Grant, the river 

 makes a long bend to the north, continuing in this direction 

 to Cincinnati, and thence westward to North Bend, the 

 home and burial-place of President William Henry Har- 

 rison ; here it turns south again, thus forming in Kentucky 

 a peninsula, as it were, pointing to the north, and including 

 the territory of Campbell, Kenton, and Boone counties. 

 Upon examining this district it was found that in places in 

 Campbell county, and over the whole northern and western 

 parts of Boone county, there were true glacial deposits on the 

 highest lands — the elevation near Burlington being five hun- 

 dred and fifty feet above low-water mark at Cincinnati. In 

 places, large numbers of bowlders of northern origin were 

 found stranded on the very summit-level of the region — i. e., 

 on the divide, between the short streams running north and 

 those running south, and between the Licking and the Ohio 

 River. They were also found south of this secondary di- 

 vide, seven miles back from the river, and five hundred feet 

 above it (near Florence, Boone county). Several were recog- 

 nized as belonging to a species of red jasper conglomerate, 

 whose outcropping is well marked on the nortjbern shore of 

 Lake Huron and about the outlet of Lake Superior. These 

 oowlders are very beautiful ; and, farther north, where they 

 are more abundant in the fields, are frequently used to adorn 

 the front-yards of residences or even for the construction of 

 public buildings. Some of the citizens of Cleveland, Ohio, 

 have brought large fragments for this purpose from the par- 

 ent ledges. But here, beside a roadway through the Ken- 



