68 GEOLOGY OP OHIO. 



Certain deposits of red shale and clay, by which the Barren Measures 

 are made conspicuous, will doubtless be found on suitable trials to furnish 

 materials adapted to some of the uses to which like deposits are being 

 turned in other portions of our scale. It seems quite probable that they 

 can be made into pressed brick of high quality. These red bands a.e 

 very wide-spread and persistent, and attention will no doubt be soon 

 directed to them. 



It can be seen from this review that every portion of our Coal 

 Measures can be depended upon for a supply of argillaceous . material, 

 fire clay, potter's clay or shale, covering a wide range of composition, 

 from nearly pure kaolin to brick clays, and adapted to nearly all the lines 

 of manufacture in which these substances are employed. 



