394 



GEOLOGY OF OHIO. 



tain small crystals, which are soft enough to be calcite, and have no taste. 

 A bitter substance also oozes from the Drift, and forms incrustations on 

 the surface along the banks of the Blanchard at Ottawa, which has the 

 taste of Epsom salt. Water from many of the wells at the same place 

 has, according to Dr. C. M. Godfrey, a cathartic effect, which is believed 

 to be due to this substance. Samples were collected for analysis, but no 

 opportunity has yet been afforded for making chemical determinations.* 



Generally the county is well supplied with material for macadamized 

 roads. The gravel from the ridges could be very advantageously used 

 for the purpose of road-making, although it has been but very little 

 developed. 



Bog ore was encountered in a number of places within the county, as 

 follows : Section 16, Liberty township, land of Adam Hammond ; a small 

 deposit so far as known. It is said also to occur about a mile north of 

 Leipsic Station; also on section 26, Liberty township. On section 8, 

 Perry township, land of E. Demick and Joseph Wollam, there are many 

 indications of a deposit of bog ore. It occurs on section 16, Sugar Creek 

 township, land of Cadwallader Jones. 



Wells and Springs. — The following data, reported by L. E. Holtz, of 

 Ottawa, the surveyor of the county, are of much interest in determining 

 the depth of the Drift and the character of water usually obtained. Mr. 

 Holtz has manifested an intelligent and active interest in all the objects 

 of the Survey, and in many ways contributed to its prosecution : 



Wells of Putnam County. 



* This was chemically examined by Mr. O. C. Johnson, of the Chemical Laboratory 

 of the University of Michigan, and was found to consist principally of Epsom salt 



