^16 CLAYS OF ALABAMA. 



Page- 



Pottery clay... .73, 78 80, 93, 97, 129, 129, 159, 163, 165, 166, 169, 172, 174, 175, 176 



179, 180 



Pottery ware in U. S. in 1897, valuation of 1 



Pottery ware from Alabama 72 



Post Tertiary loams for building bricks 112 



Powell's, Reuben, clay 99 



Porosity of clay '. '. 39 



Prattville clays 25, 28, 201 



Preparation of clays 59 



Pressed brick, clays for ? 88, 177, 182 188, 189 



Pressed brick, shale for 187 



Pressed bricks 86 



" " in U. S. in 1897, valuation of 1 



Presses for washed kaolin 67 



Pressley's pottery, Elmore Co 88 



Preston's, W. D., pottery, Autauga Co 92 



Properties of clays 1, 3, 8, 114 



Prospecting for clays 59 



Purification of clays in limonite banks 74 



Pyramids, Cramer and Se^er 32 



Pyrite 44 



Pyritein clays " 14, 44 



Pyrometer, thermo-electric 37 



Pyrometers 31 



Pyrometer, Seger 32 



Pyroxene in clays 19 



Quartz 41 



Quartz as a grog 132 



Quartz determination 49 



Quartz in clays 18, 21, 28, 41, 42 



Quartz in kaolin 116 



Queen ware clay 86 



Radiolarian clay 158 



Railroad cuts, clays sliding in 90, 94, 96 



Randolph, Bibb Co., clays near 90, 91 



Randolph County clays 72, 73 



" . " kaolinite 71, 72 



" " mica veins 72 



" ." micaschists ' 70 



" " pegmatite veins :... 72 



Rational analyses 56, 57 



" < of clays 50, 54, 147, 149 150, 152, 154 



" <l of kaolin 54 



" " , uses of 56 



Red burning clays 59 



Red clay, Lauderdale Co 112 



Red Mountain, Wills' Valley, clays 77, 76 



Red shale, Marion Co 



Refractory articles 146 



" bauxite 142 



11 clays 11, 94, 105, 116, 131, 133, 135, 156, 157, 176, 180 



