INDEX. 217 



Page. 



Hefractoriness in clays 51 



"Refractory quotient" 31 



Residual clays 5, 6, 13, 69, 73, 74 



Rhea, Mrs. C., Colbert Co., clays from 110 



Ries, Dr. Heinrich, general discussion of clays by 3 



11 , *' " , physical and chemical properties of clay by 14 



" , " " , quoted 69, 70, 79, 81, 88, 89, 92, 93, 94, 97, 98, 99, 102, 103, 



104, 109, 110, 126 



Roberts' Mill, Pickens Co., clay near 97, 170 



Robinson Springs, Elmore Co., clay near 88 



Rock Run, Cherokee Co., bauxite, refactory 142 



Rock Run, Cherokee Co., clays near 74, 117, 118, 133. 136, 160 



" " kaolin near 28 



Rodentown, DeKalb Co., pottery and clay near 80 



Rollin's, Thos., Franklin Co.. clay 108, 109, 180 



Russell County clays 87 



Russelville, Franklin Co.. clays near 108 



Rutile (titanic acid) in clays, 21 



Rye's pottery, Milldale (Detroit P. O.) 101 



St. Louis fire clays, silica in 20 



Sand determination 49 



Sand in clays 18, 20, 21 



Sand, molding, Marion Co 105 



Saunder's Ferry, Tuscaloosa Co., clays near 95 



Savoy P. O., Franklin Co,, clays near 108 



Saxony clays and kaolins 54 



School House Hill, Centerville Co., clays in 91 



Schists, mica 70 



Screening of kaolin .' 65 



Sections of clay beds and outerops 77. 78 89, 90, 91, 93, 94, 95, 96, 98, 99, 



100, 102, 103, 104, 105, 109, 110, 111, 162. 



Seger cones (pyramids) 32* 



" quoted 15, 18, 21, 59 



Sedimentary clays 5, 7 



Semi-refractory clays 131 



.Settling tanks 66 



Sewer pipe in U. S. in 1897 valuation of. 1 



Shales 7, 183, 184 



Shales, Carboniferous, for vitrified and pressed brick, terra cotta. etc 80, 81, 105 



Sheffield Paint Company, clay of* 112 



Shewberry, quoted 200 



Shirley's Mill, Fayette Co., clays near 103, 176, 184 



Shrinkage in clays 18, 23, 24, 26, 56, 132 



Silica determination 46 



for paint and glass manufacture 112 



in clays 20, 21, 51 



Silicate of lime in clays 17 



Siliceous clays 28 



Siderite in clays '. 44 



Sink hole clays 73 



