•216 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 



J'octery ware from Alabama 72 



Post Tertiary loams for building bricks 112 



Powell's, Eeuben, 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 Seger 32 



Pyrite 44 



Pyrite in 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 



Sailroad cuts, clays sliding in 90, 94, 96 



Randolph, Bibb Co., clays near 90, 91 



Randolph County clayd 72, 73 



" " kaoliaite 71.72 



'' " mica veins 72 



" '' mica schists 70 



" " pegmatite veins 72 



Rational analyses 56, 57 



" '• of clays 50, 54, 147, 149 150, 152,- 154 



" " ofkaolin 54 



" " ,usesof 56 



Red burning plays 59 



Red clay, Lauderdale Co "112 



Red Mountain, Wills' Valley, clays...' 77, 78 



Red shale, Marion Co 186 



Refractory articles 146 



" bauxite 142 



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



