= m 
apeye 
230 On the Climate, Diseases, Geology, yc. of Ohio. 
our alluvial soils, and like them they have been abraded: by 
the stones with which they have come in contact, aided b 
side of the hilly region about Hillsborough, in Highland 
county, but I never saw any on the southern side of this re- 
gion, except in the form of pebbles, in the beds of rivers 
passing through the country where the larger masses exists 
These rocks abound: most in vallies, which now are, or ap- 
pear to have been the beds of streams. Thus in the bed of 
the Whetstone, below the town of Delaware, large rocks of 
this class are seen reposing on limestone. The latter rock 
is im situ, and abounds in shells. The stream (the Whet- 
stone) has worn itself a channel, in some places very deep, 
through clay slate, until it has been checked in its progress 
downwards by avery hard, compact limestone. In the barriers 
{improperly so called) in Madison county, none but primitive 
sare found, and they are used for chimneys, and for the 
underpinnings of buildings. They are sometimes used for mill 
stones, and one fragment large as make three mill stones. 
But by what means were they conveyed to the spot where they 
and, indeed, the American continent with water, and then to 
form a current in the ocean from north to south, or from 
But it is unphilosophical to 
eae more causes than are nece esders Satis 
a with the voyages of polar navigators, need not to be told 
that the icebergs sometimes adhere to the rocks at the bot- 
tom of the sea, and that “wind: owerful waves 
break up these i 
