INDEX. 



539 



D. 



Page 



Da Costa, clay at, 369 



Dana, 46 



Danville, clay near, 508 



Davenport, clay at, 486 



Davis, A. \\\, clay of, 508 



Decker, George B., brickyard of, 477 



Decoration of pottery, 303 



Delaware river, clay mining along,... 339 



Delft ware, value in 1902, 309 



Devonian formations, 206 



Dillon's Island, clay at, 492 



Dixon Estate, W. B., analysis of fire 



clay of, 51 



Dobb's brickyard pits, description of, 397 



Dobbins, Murrell, clays of, 381,383 



Doerr, David, clay of, 369 



Dolomite in clay, 48, 64 



Dogtown clays, 197, 339, 428 



Draintile, 288, 289 



Drift clays, 13 



Drummond's clay bank, 475, 476, 477 



Dry clays, 50 



Dry crushing, brick manufacture,.... 223 



Drying bricks 233, 246 



pottery, 300 



Dry-pressed bricks, tests on, 256 



Dry-press process, molding brick,.... 230 



Dunellen, clay at, 120, 503 



Dutch kilns, 240 



E. 



Earthenware, burning of, 105, 300 



clays for, 294 



decoration, 303 



glazing of, 301, 302 



temperature of burning, 105 



value in 1902, 309 



Earth's crust, elements in, 40 



Eastern Hydraulic Press Brick Co., 



clay pits of, 401,481,483 



Eatontown, clajr near, 477 



Eayre, Joshua, clay of, 199, 378 



Ebernhahn, analysis of fire-clay from, 320 



Edgar Brothers, feldspar of 469 



Edgar, C. S., clay banks of,. . .449, 450, 452 



Edgewater Park, clay at, 132, 389 



Electrical porcelain, 303 



value in 1902, 309 



Elements in earth's crust, percentage 



of, 40 



Ellison property, section in pit, 194 



Elwood, clay at, 370 



Elizabethport, clay at, 506 



Enameled brick, 218 



clays used for, 222 



Eocene Marl, The, 147 



Erato, P., clay of, 202, 393 



Erickson's clay, description of, 412 



Page 



Erosion, 17 



Essex county, clay industry of, 418 



Estuarine clays, 11 



Evaporation of water in clay, 72 



Ewan Mills, clay near, 422 



Excelsior Terra Cotta Company, clay 



of, 504 



Farmingdale, clay near, 477 



Faulting of clay beds, 15 



Feldspar, composition of, 44 



in clay, 43 



Middlesex county, 468,469 



source of alkalies, 67 



species of, 44 



Feldspar — kaolin sand, 177-182 



Fenwick, clay near, 499 



Ferric oxide in clays, 56, 57 



Ferrous oxide, 57 



Fieldsborough, clay near, 380 



Fire brick, absorption by, 326 



analyses of, 327, 331 



burning of, 325 



chemical composition, 327 



foreign 333 



fusion points of, 327-331 



industry, history of, 323 



manufacturers of 324 



methods of manufacture,.... 324 



refractoriness of, 326,331 



temperature of burning, 105 



Fire clay, 173, 186, 192,214 



analyses, 31 5-320 



definition of, 100, 214, 311, 337 



ferric oxide in 56 



fusibility of 315, 317, 



319, 320, 441, Appendix D 



kaolinite in, 312 



lime in, 64 



magnesia in, 67 



Middlesex county 439, 



444. 4SS-4S8 



mined in 1902, 340 



mineral impurities in, 322 



miners of, 188 



No. 1, defined, 337 



No. 2, defined, 337 



Ohio No. 2, analysis of, 238 



plasticity, 321 



properties of, 311,321 



pyrite in, 322 



silica in, 55, 312-317 



tensile strength of, 322 



thickness of, 188 



titanium in, 317 



total alkalies in, 67 



uses of, 214, 322 



Fire-mortar clay, Middlesex county,.. 458 

 Fire sand, Middlesex county, 191,469 



