A PRELIMINARY REPORT ON CLAYS OE FLORIDA 
265 
Putnam County, 14, 28, 29, 31, 38, 39, 63, 
197, 240 
Pyrite, 74, 81, 87 
Pyrolusite, 77 
Pyrophyllite, 72 
Q 
Quarterman, B. S., 240 
Quartz, 14, 66, 72, 73, 80, 81, 218 
Quincy, 160, 161 
Quintette, 145, 154 
R 
Railroad ballast, 106 
Ranson, Robert, 17 
Rectorite, 72 
Refractory clay, 70 
Residual clay, 66, 67, 69, 72, 110, 111 
Retorts, 106 
Reusch, H., 72 
Richbourg, D. J., 124 
Richmond, kaolin, 236 (see Okahumpka) 
Ries, H., 63-65, 67, 69, 72, 79, 81, 82, 84, 
89, 92, 93, 96, 98, 179, 180, 218-222, 
259 
Road metal, 106 
Roofing tile, 14 5, 154 
Royston, Ed, 159 
Rutile, 76, 78, 84 
S 
Saggers, 106, 244 
St. Johns County, 200-201 
Sand and gravel, production of, 22 
Sand-lime brick, 22, 247 
Santa Rosa County, 201-205 
Schaffer, I. L., 153 
Schurecht, H. G., 77 
Schrotterite, 72 
Scove kilns, 202, 204 
Sections indicating thickness of kaolin, 
236, 237, 240 
Sedimentary clay, 66-68, 72 
Sedimentary kaolin, 117, 121, 193, 216- 
241, 244, 245, 258-260 
Seger cones, 96-98, 135, 244, 255-257 
Selenite, 76 
Sellards, E. H., 28, 29, 109, 125, 138, 191, 
196, 207, 217, 218, 221-223, 235, 259, 
260 
Sericite, 73 
Serpentine, 65 
Sewer pipe, 106, 247, 248 
Shale, 70 
Shell Bluff, 157 
Short clay, 89 
Shrinkage of clay, 91-93, 100, 101 
Shuttle eyes, 106 
Siderite, 74, 81 
Silica, 65, 78-80 
Silicates, 64, 65, 71, 72, 82, 83, 90 
Sink-holes, 109, 110, 115 
Sillimanite, 78 
Slaking of clay, 91, 100 
Slip clay, 106 
Soda, 65, 76, 78, 83 
Soil, definition of clay, 65 
Soluble salts in clay, 85-88, 193 
Somers, R. E., 71, 73, 76-78, 232 
Soper, E. K., 69, 70 
South Carolina, white clays of, 216, 226 
Southern Farm Land Co., 157 
Spanish settlements, 242 
Spark plugs, 232 
Staley, H. F., 85, 87 
State Hospital, Chattahoochee, 158-162 
Statistics on mineral production, 14-23 
Stoneware (clay), 104, 145, 154, 214, 243 
Stoutamire, J. D., 179 
Stoutamire, W. B., 179, 180 
Strait, Allen, 63 
Stratigraphy, 107 
Strength of clay, 99, 102-103 
Sulphur, 74, 78, 79, 83, 85 
Sumter County, 206, 217 
Suwannee County, 111, 207, 217 
T 
Tallahassee Pressed Brick Co., 117, 164 
Tampa Brick Co., 171 
Tampa formation, 108, 112, 166, 170-172 
Taylor, C. B., 63 
Tedder, C. H., 63 
Temple Terrace, 171 
Tensile strength of clay, 102 
Terra-cotta, 104-106, 145, 154, 250 
Texture of clay, 91 
Thermoelectric pyrometer, 97 
Thickness of kaolin formation, 236, 237, 
240 
Thompson, R. W., 213 
Tile, 10.6, 243, 250, 258 
Titanic acid, 78 
Titanite, 78 
Titanium, (76), 80, 84 
Tombstones, clay, 106 
Tourmaline, 78 
Trail Ridge, 135 
Transported clays, 70 
Transverse strength of clays, 102 
Turpentine cups, 106, 127, 138, 154, 214, 
243, 248 
Tuyeres, 106 
