458 GEOLOGY OF OHIO. 



pends upon the area of land which is above the level f)i the canal. All 

 that part of the county, embracing about nine townships, which lies on 

 the east and north-east of the main canal, and west and north-west of 

 the Sidney Feeder, is above the highest "level" of the canal — it will 

 average about seventy-five feet above the canal. Of course it would be 

 possible to gather many times more water from this area than could be 

 contained in Loramie Reservoir. While all this area could not be made 

 available, yet there must be much of it which could be, were it consid- 

 ered a matter of sufficient importance to have it done. Considering, 

 then, alone, the great area, both in this county and in the counties above 

 this, about the head- waters of the Miami River, there should he no ques- 

 tion as to the abundance of the supply of water above the summit-level 

 of the cinal to continue it as one of the importaat avenues of commerce 

 of the State. 



THE DRIFT. 



The level of the canal at Sidney is about thirty feet above the 

 rock surface. Add to this distance the agcertained elevation above 

 the canal of any point in the county, and it will give approximately the 

 thickness of the Drift or clay, gravel and bowlder deposits. This would 

 make the greatest thickness of the Drift on the Towana turnpike one 

 hundred and sixty-four feet above bedded rock. Within about two miles 

 of Sidney, on the turnpike to St. Mary's, the elevation measures one 

 hundred and twelve feet above the canal at Sidney. Add to this thirty 

 feet and we have one hundred and forty-two, which may be very confi- 

 dently considered the depth of the, Drift at this place. It is true these 

 figures may not be the exact measure of the distance from the surface 

 down to the solid rock. Other formations which are known to occur 

 north of this county, and which overlie the formation which occurs here, 

 may underly the deep drift of the northern part of this county, but this 

 is not certainly known to be the case. On thS south, at the line between 

 this and Miami county, on the Infirmary turnpike, the grade falls forty 

 feet below the level of the canal, which is ten feet lower than the top of 

 the rock near Sidney. By the course of the river it will be seen that 

 there is a dip on the surface of the rock as we go southward. The canal 

 rises one hundred and fifty-two feet from Tippecanoe (belo-o' Lock 39) to 

 the feeder at Sidney. While accurate measurements were not taken of 

 the difference in elevation of the top of the Clinton Stone in the neigh- 

 borhood of Tippecanoe, and the surface of the canal, yet some measure- 

 ments which I recorded make the distance about sixty feet. Taking this 

 from one hundred and fifty-two makes this formation about ninety-two 

 feet at Tippecanoe below the level of the Sidney Feeder; whereas the 

 top of the Clinton, where this formation is last seen above Bogg's mill- 



