1 6 OF DENISON UNIVERSITY. 



the southeast, then toward the northeast to the point C, from which 

 its general course is east to the Scioto river. Somewhat more than 

 two miles above Rocky Fork, a considerable tributary, Rattlesnake 

 Creek, or Rattlesnake Fork, enters ; and the enlarged stream pursues 

 a tortuous course of several miles to H. At the point (? is a ledge of 

 limestone, forming the Falls of Paint Creek. The largest tributary 

 within Ross county is North Fork whose head-springs are on or be- 

 yond the Fayette county line; it flows southeast past Frankfort and 

 enters the main stream at C. There are many smaller streams, and 

 scores of ravines, some of them several miles in length; but only 

 those are represented which contain water all the year. The lowest 

 level at which the bed-rock is visible, whether in the bed of streams 

 or on its line of contact with the drift, is shown by heavy dotted lines; 

 no account is taken of the superficial deposit on the table lands, which 

 in most places is quite thin and frequently is altogether lacking. In 

 the low-lands the drift extends to a greater depth than has ever been 

 reached by well diggers. The crossed lines denote drift-filled valleys 

 in which there is novv no running water in greater amount than may 

 come from a small spring. 



A tour of discovery by a person unfamiliar with the country, 

 starting at Greenfield to follow the course of Paint Creek, would, to 

 judge from the experience of the writer, result somewhat in this way. 

 except that a large part of the territory here figured would have to be 

 closely and accurately examined many times before the facts were un- 

 derstood : 



From Greenfield southward the investigator will find limestone 

 cliffs bordering the stream, separating here and there with little level 

 valleys between them, the water skirting the rock along first one side 

 and then the other. Tributary ravines, dry most of the year, show 

 similar gorges or canons. When he reaches Rattlesnake he finds the 

 valley swing east and widen considerably, with heavier deposits of 

 drift ; but suddenly it turns southward again through a valley more 

 contracted, with rocky walls. Following these, he presently turns 

 northward, and finds drift deposits on both sides of him. These, 

 however, soon disappear, and he follows a long loop through bed-rock, 

 coming after awhile to a place where the stream again flows through 

 drift almost to the mouth of Rocky Fork. From here, for several 

 hundred yards (at H) the bottom of the creek is solid rock, with 

 thousands of "pot-holes " and long narrow grooves cut by the stones 



