Clays
Clay is the product of the decomposition of felspar through the agency of the atmosphere. There are two classes of clays and both are represented in our county, viz: clays proper, and shales. All shale becomes clay when moistened. Soap-stone is a clay stone and slate is only a harder variety of the same substance. As to varieties, clays may be divided into Fire Clay, Potters Clay and Brick Clay. There are no less than a dozen well recognized strata of clays in Perry county, all of which are workable. All varieties are repre- sented. Their relative positions may be seen by ex- amining the vertical sections of horizons in different parts of the county. Many of these seams are of great thickness and the supply is inexhaustible.30