BIG SPRING PRAIRIE. 



43 



to secure sufficient fall for further proper drainage, it 

 was necessary to blast out a couple of feet of solid rock for 

 the greater portion of the distance from the bridge just 

 north of the Northern Ohio depot to the point where it 

 empties into Spring Run. A portion of the southern 

 arm of prairie just south of the Carey-Findlay road has 

 been rendered fit for cultivation by means of a very ex- 

 tensive system of underground drainage. A walled 

 catch-basin, receiving the water from several side arms, 

 occurs just south of this road. A large tile drain carries 

 this water to the southwestward. 



FiGTJKE 9. Bower Ditch Just Beyond Limit of Pbaieie, Deepened in 1891. 



4. Lagging Behind of Effects. 



On area D of Map II, although there are ditches 

 on three sides of it producing excellent drainage, yet 

 Phragmites phragmites (Reed) still flourishes fairly 

 well. It is not as dense or rank as formerly, but it is 

 yielding very gradually to the changed conditions, and 



