FRANKLIN COUNTY. 597 



between the deep furrow worn by Big Walnut, and the scarcely less con- 

 spicuous one of Rocky Fork ; and the interval between the last named 

 valley and Black Lick, is of the same extent. Another extension of 

 table land, of three miles in breadth, carries us to the east line of the 

 county. This east and west section shows, in other words, seven con- 

 spicuous notches or depressions, every valley, in fact, of any note, in the 

 northern half of the county, being shown in it. 



A similar section, taken in the southern half of the county, on the 

 north line of Hamilton and Madison townships, would agree very well 

 in its main features with the first section. It would show the valleys of 

 Big Darby, of Darby Big Run, Scioto Big Run, of the Scioto River, of 

 Alum Creek, Walnut Creek, and Black Lick. 



The highest land of the county is found on its northern and western 

 borders. The several water-sheds between the valleys named above, in 

 Plain, Blendon, Sharon, and Perry townships, hold land about 925 feet 

 above tide-water. The summits, on the western side of the county, rise, 

 perhaps, a. few feet higher ; but it is not known that any land in the 

 county exceeds 950 feet in elevation. The lowest land is, of course, 

 found in the Scioto Valley, on the southern line of the county. 



The elevations of a number of points in the county, are here appended, 

 being compiled from various railroad and other surveys that have been 

 carried through the county : 



FT. 



Columbus — Union Depot, above tide-water 740 



" Water-table of Ohio Agricultural and Mechanical College 76)J 



" Low water of Scioto, about 700 



Groveport 835 



Winchester 769 



Georgesville 807 



Worthington Station 910 



Westerville Station (C. C. C. & I. R. R.) 926 



Westerville — depot in village 905 



County line, on C. C. C. & I. R. R 930 



In these elevations, the level of Lake Erie is assumed to be 570 feet 

 above the sea, in accordance with the most recent determinations ; but 

 it is to be added that the results given above are not minutely accurate. 

 They are drawn from various railroad surveys, which do not, themselves, 

 exactly agree as to the elevation of their common point — Columbus. 

 The limit of error will not, however, exceed five, or, at most, ten feet. 



The Scioto Valley, which has already been named as giving rise to the 

 most conspicuous topographical features of the county, consists of two 



