262 
FLORIDA GEOLOGICAL SURVEY—15TH ANNUAL REPORT 
Clays, 3, 53-259 
classification of, 69-71 
definition of, 64-65 
origin of, 65-66 
suitable for 
common brick, 122-124, 127-131, 133, 
135, 138, 154, 157-160, 214 
drain tile, 122, 127, 129-131, 138, 156, 
157, 160, 162, 164, 172,182,186,214 
face brick, 214 
fire-proofing, 122, 156, 164, 172, 186 
furnace lining, 122 
hollow blocks, 122, 127, 129, 130, 138, 
156, 157, 160, 162, 164, 171, 172, 
182, 185, 214 
road material, 122, 134, 158, 166, 171, 
174, 177, 186, 192 
stoneware, 214, turpentine cups, 214 
Clay County, (114), 128-132, 235 
Clay County Steam Brick Company, 131 
Ciay wmrkers, directory of, (15), 258 
Cobb, S. E., Jr., 5 
Collins, Harry L., kaolin of, 238 
Colluvial clay, 69 
Collyrite, 72 
Color of clay, 90, 103 
Columbia County, (114), 133-134 
Common brick, 162-214 
Conditions of deposition of kaolin, 224 
Cone, W. N., 134 
Cooke, M. K., 5 
Cosner, F. D., 63 
Crary, J. W., Sr., 140, 242, 259 
Cream-colored brick, 214 
Cretaceous clays, 222, 224, 226 
Crowder, S. B., clay of, 211 
Crucibles, 106 
Crystal Springs, 193 
D 
Dade City, 192, 193, 240 
Dali, W. H., 28, 33 
Davis, N. B., writings of, 222, 224, 259 
Description of clay deposits, 122 
DeSoto County, 134, 183, 235 
Dexland Bluff, 116, 142, 143, 145, 148, 
149, 151, 152, 155 
Dexter, Chas. A., 139, 143 
Diatomaceous earth, 16 
Dick, M., 72 
Distribution of clay deposits, 122 
Dolomite, 76, 82, 83 
Dolores Brick Company, 141, 147, 148, 
150, 155, 156 
Drain tile, 214, 243 
Dunnellon formation, 115, 260 
Duval County, 135-138 
E 
Edgar, C. S., 226 
Edgar Plastic Kaolin Company, 14, 15, 
219, 220, 223, 226, 229, 240 
Edgar, kaolin mines, 14, 217, 226, 229,240 
Edwards, R. J., 212, 213 
Efflorescence on clay or clay products, 
85-88 
Emery wheels, 106 
Eocene, 107-108, 110 
Epidote, 78 
Escambia County, 116, 138-157, 246, 247 
Estiffanulga Bluff, 182, 183 
Estuarine clay, 70 
Expenditures of the Survey, 8-13 
F 
Face brick, 154, 172, 182, 188, 200, 214, 
243, 247, 258 
Fat clay, 89, 100 
Feldspar, 65, 66, 72, 73, 80, 222, 223, 244 
Filter tubes, 106 
Fire-boxes, 122 
Fire-brick, 106, 140 
Fire-clay, 70, 71, 104, 140 
Fire-proofing, 105 
Fire shrinkage of clay, 101 
Flagler County, 157-158 
Flint, production of, 17 
Flint clay, 70 
Flocculation, 68 
Flood-plain clays, 68, 70, 110, 117, 161- 
164 
Florida China Clay Corporation, 15, 225, 
228, 231-237 
Florida Diatomite Company, 16 
Florida Geological Survey, work of, 6 
Florida Industrial School for Boys, 172, 
173 
Floridin Company, 160 
Flower pots, (106), 214 
Flues, 106 
Fluxing impurities, 79 
Foster Kaolin Co., 240 
Front brick, 105 
Fuller’s earth, 16, 62, 63, 113, 121, 160, 
185, 221, 245, 260 
underlying kaolin formation, 237, 240 
Fulton, W. A., 63 
Furnace linings, 122 
| Fusibility of clay, 93-97 
