264 rLORIDA GEOLOGICAL SURVEY-I5TH ANNUAL REPORT

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McLaughlin, W. J., 183-185 Ocala formation, 107-108, 110, 124, 166,
McMillan Brick Co., 150, 156 185
 Ocklocknee Brick Co., 117, 162, 163, 258 M Okahumpka, kaolin mined near, 217,
Mickler, Dr., 87 226-237, 239
Magnesia, magnesium, 65, 76, 78, 83, 134 Old Brick Yard Landing, 187, 188 Magnesium carbonate, 64 Oligocene, 108, 111, 112
Magnetite, 74 Orange County, 114, 189-191
Majolica, 106 Organic matter in clay, 78, 79, 84
Manatee County, 63, 113, 134, 183-185 Origin of kaolin deposits, 221 Manganese, 77, 90 Orlando Pottery, 15, 189, 190, 244
Mann, Albert, quoted on diatoms, 16 Orthoclase, 83 Mansfield, W. C., 3, 25 Orton, E., 64, 69
Marbles (clay), 106 Orton, E., Jr., 69, 84, 85, 94
Marianna formation, 108, 111, 172 Osceola County, 28, 29, 35, 36, 191-192
Marion County, 111, 113, 114, 185-186,
 238
Marine clays, 68, 70
Marls, 8, 208, 210 Pablo Beach, 17
Matson, G. C., 28, 29, 221, 259 Palatlakaha River, kaolin deposits on,
Materials underlying kaolin-bearing 235, 236
 formation, 219, 240 Paper filler, 71, 106
Mellor, J. W., 77 Parmelee, C. W., 69, 70, 71, 86
Memminger, C. G., 259 Pasco County, 192-194, 217, 240
Mendenhall, H. D., 63 Paving brick, 105
Meteyard, Eliza, 138, 242, 259 Peace Valley Farms Co., 196
Methods of mining kaolin, 233 Peat, 8, 17
Merrill, G. P., 64, 67, 76 Pensacola, 138, 140, 143, 242, 260
Mica, in clay, 66, 67, 73, 80, 81, 83, 142, Pensacola Brick Co., 155, 156
 218, 222, 224, 227, 241 Pholerite, 72
Mineral City, 17 Phosphate, 18-20, 115
Mineral productions of Florida, 14-23 Phosphatic clay, 194 Mineral waters, output of, 23 Physical properties of kaolin, 229, 230
Mineralogy of Florida kaolins, 232 Pigments, 71, 106
Minerals in clays, 71 Pinellas County, (112), 114, 194
Mining of kaolin, methods used in, 233- Pitchers (clay), 106
 234 Plans of the Survey, 8
Miocene, 35-37, 108-109 Plasticity of clay, 89-90, 100, 101, 222
Minton, J. T., 200 Platt Bros. brick plant, 137, 138
Mirror Lake, kaolin around, 240 Pleistocene, 40-42, 109, 110, 116, 117,
Molding sand, 192 139, 140
Morris & Blumer Brick Co., 166-168 Pliocene, 27, 29, 109, 110, 115
Montmorillonite, 72 Polishing brick, 106
Mooney, Frank, 130 Polk County, 114, 194-197, 240
Murphy, G. H., 202, 212 -Porcelain, 106, 232
Muscovite, 73 Porosity of clay, 97, 99, 102
 Potash, 65, 78, 83
 N Potassium, 76
 Potteries, 15, 121, 138, 243, 245, 258 Nashua (marl) formation, 28-35, 115 Pottery, 106, 138, 145 Nassau County, (28), 29, 40, 86-189 Powell, W-. B., 63 National Lead Co., 17 Probable age of kaolin deposits, 224
Nelson, P. A. J., 191 Production of brick, statistics of, 254
Newlands, C. 0., 35 Psilomelane, 77
Newtonite, 72 Publications issued by the Survey, 7
Nuckolls, B. H., 174 Pumps, 106