260 GKOLOGY OF OHIO. 



Clays. — Under Coal No. 3 there is a fire-clay which seems to be of excel- 

 lent quality. On Symmes Creek it is manufactured into pottery-ware, 

 which is held in high esteem. The other beds of fire clay are sometimes 

 quite thick, but usually they contain too much iron to be of any use. 

 The heavy subsoil furnishes excellent material for bricks, and there are 

 few farmers who can not make all the bricks they need from clay found 

 on their own property. 



Building Stone. — In the townships along the Muskingum, a sandstone 

 below Coal No. 6 affords an excellent building stone, and is extensively 

 quarried for this purpose. In other townships, east from the river, sand- 

 stones belonging to the Barren Group are occasionally employed, but 

 they are too soft for any thing but coarse work. The Waverly sandstones, 

 in the western portion of the county, will doubtless yield a first-class 

 rock, but at present they are not available. 



Limestone. — None of the limestones give a lime sufficiently white for 

 inside work. In the eastern portion of the county the strata are usually 

 too impure to be burned. The blue and gray limestones yield a strong 

 lime, which is used for all ordinary purposes. As exposed along the 

 Muskingum River, these are good enough to be used as a flux. 



Water.— The supply is abundant every where. 



