ANCIENT EARTHWORKS OF OHIO. 229 



and separated by Uvo other groups of rocks, are the principal 

 sulphur springs of that State, the whole series of rocks where the 

 sulphur springs are so copious being undistiu-bed. Next to 

 them, are the Salines of the State, and in the proof shown of 

 their local origin, we find analogically also the proof of the local 

 origin of all the others. 



The facts from New York make known, as it appears to me, 

 this important result, that a connection exists between certain 

 rocks or parts when complex, and certain kinds of waters ; and 

 that rocks, generally, insulate their own waters. 



It may be necessary to state, that the nature of the materials, 

 whether volcanic or otherwise, either wholly or partially, from 

 whence the waters issue, is not the subject discussed, but the dis- 

 connection totally of those waters with any actual volcanic 

 som-ce, confining them generally to the rock from whence they 

 appear. 



In commencing this paper, it was the intention of the writer 

 to condense the whole subject within a few pages, the applica- 

 tion therefore, of mineral springs, by means of water or moisture 

 holding mineral substances in solution, to the filling up of the 

 cavities or fissm-es of rocks, will be reserved to the next meeting 

 of the Association. 



Ancient Earthworks of Ohio. By Prof. John Locke. 



Earthworks of great antiquity and of various construction are 

 found scattered over the whole Western Valley. It is ti'ue that in 

 a few instances mistakes have been made in respect to them, a 

 natural conical hill having been called a " Mound." No doubt 

 such an error was committed by the geographer, the late Rev. Mr. 

 Flint, with reference to some ranges of conical hills west of the 

 Mississippi. This error having been corrected and reviewed by 



