516 GEOLOGY OF OHIO. 



A sample of the ore was analyzed by Prof. Wormley, with the follow- 

 ing result : 



Water 5.00 



Silicious matter '..... 26.75 



Sesquioxide of iron 11.30 



Carbonate of iron . 13.31 



Alumina 0.80 



Manganese Trace. 



Lime, phosphate 0.52 



Lime, carbonate 37.30 



Magnesia, carbonate 4.57 



Sulphur 0.23 



99.78 



Metallic iron 14.34 



Phosphoric acid 0.32 



Between Hiramsburg Station and Ava Station Col. Teeters, of Cald- 

 well, to whom I am indebted for much intelligent aid, found some ore 

 (but not, I think, in place) of a much better quality, as seen by the fol- 

 lowing analysis : 



Water 12.85 



Silicious matter, etc 20.04 



Sesquioxide of iron 58.27 



Alumina Trace. 



Manganese 5.80 



Phosphate of lime 1.30 



Carbonate of lime 0.14 



Carbonate of magnesia 1.21 



Sulphur 0.10 



99.71 



Metallic iron 41.78 



Phosphoric acid 0.60 



The percentage of phosphorus is not large, and the amount of metal- 

 lic iron is considerable. The manganese would make the ore valuable 

 for certain uses. Those interested should ascertain whether there is an 

 available quantity of this ore. 



At Ava .Station the same fossiliferous limestone, so often referred to, 

 was seen. At this place a test well was bored to reach the Cambridge 

 coal, which was, by report, found about one hundred and twenty-five feet 

 below the horizon of the limestone. The thickness of the seam was given 

 as six feet six inches. This is the proper place for the Cambridge seam, 

 and finding the coal verifies the conclusion previously reached from other 



