260 GEOLOGY OF OHIO. 
Clays.—Under Coal No.3 there isa 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. 
Timestone.—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. | 
