inua^ 215 



_,, Pa«e. 



Odor of clays H 



Ohio clays 168 



Ohio Geological Survey, quoted 168, 171 



Oliver, O. K., Tuscaloosa Co., pottery of. 92 



Orange Sand formation 84 



Organic matter determination 45 



" " in clays 14, 22, 28, 39, 40 



Origin of clay 3 



Ornamintal bricks in U. S. in 1897, valuation of. 1 



Oxanna, Calhoun Co., clays 74, 133, 135 



Oxford, Calhoun Co., clays 76, 188 



Paint clay, Lauderdale Co 112 



Paleozoic clays 6 160 



Palmer's, H., Marion Co., clays 107, 194, 195 



Pannel's place, Miss., clay on 84 



Paving brick clays : 137^ 183 



" " shales 185 



Peaceburg, Calhoun Co., clay from 74, 133, 134 



Pearce's Mill, Marion Co., clays 105, 107, 128, 133, 134, 155, 156 



Pearce's Mills, Marion Co., shale 81, 105, 117, 184, 186, 201 



Peden, Aleck, Miss., clay 01 84 



Pegmatites ( graphic granites) 70, 72 



Pegram, Colbert Co., c'ays near 40, 109. 110, 117, 129, 134, 157, 180 



Pennsylvania glass pot clay 155 



Phillips, W. B., quotert .106, 127, 167 



Phoenix City, Russell Co., clay near 87 



Pholerite 4 



Physicial properties of clays 24, 114 



Pickel, Dr., quoted '. Ill 



Pickens County clays 97, 170, 171 



Pikeville, Marion Co., clays near 106 



Pinetuoky, Randolph Co., clays 72 



Pipeclays 85, 88 



Pipe, sewer, in U. S. in 1897, valuation of 1 



Plastic clays •. 73, 76, 130, 131, 138 



Plastic ball clays of Florida ' 6 



Plasticity 4 



Plasticity in clays 23, 24, 25 



•' kaolin 116 



Plistocene clays 112 



Pond clay 73 



Porcelain clays 11, 71, 72, 86 116 117 



Porcelain earth 86 



Porcelain ware from Alabama 72 



Potash determination 46 



" in clays 11 



Portland cement, clays for 199, 201 



" " , materials for 199, 201, 202 



Potteries 80, 88, 92, 93, 98, 99, 100, 101, 107, 108 



