538 



INDEX. 



Clay — Continue'd. Page 



quartz in, 42 



Raritan, 161 



residual, 6 



retort, 10 



rutile in, 47 



sanitary ware, 296 



secondary changes in, 14 



sedimentary, 8 



shipped to other states, 341 



siderite in, 45 



silica in, 54 



Silurian, 206 



size of grains, 108 



softening of 22 



surface working of, 32 



swamp, 12 



terrace, 12 



Tertiary, 137 



tilting of, 16 



Triassic, 205 



ultimate analysis of, 49-52 



underground workings of, ... 30 



used in pottery making, 294 



uses of, 213 



washing of, 36 



water in, 71 



white ware, 296 



working of, 25-38 



Clay base, The 4. 54 



Clay-bearing formations, economic 



description, 343-366 



Clay literature, bibliography of, . . . .513— 518 



Clay loams, 121, 432 



Clay Marl series, The, 152 



Clay Marls, Burlington county, .. .382-388 



Gloucester county 420, 421 



Mercer county, 430-432 



Monmouth county, 472 



Clay Marl I, character of, 159 



economic description, 360-363 



localities where used, 161 



stratigraphic relations, 160 



mica in, 44 



physical properties, 361—363 



soluble salts in, 77 



Clay Marl II, character of, 157 



economic description 357-360 



localities where worked, 158 



physical properties, 359, 360 



soluble salts in 77 



Clay Marl III, 156 



economic description 357 



physical characters of, 357 



Clay Marl IV 155 



burning tests on, 356 



economic description, 356 



Clay Marl V 154 



Clay miners, directory of, 342 



Clay-mining industry, 335~342 



Page 

 Clay products, rank of New Jersey 



in 511 



Clay Report of 1878, xxiii 



Clayton, William, clay on property of, 491 



Clayville, clay near, 408 



Clayville Mining & Brick Company, 



clay pits of, 408 



Clay-working industry by counties, see 

 Atlantic county, etc. 



Cliffwood, clays near, 472-475 



Cliff wood lignitic sandy clays, 166 



Closter, clay at, 125 



Coal, 74 



Cohansey clays, 139, 388, 401, 408 



economic description, 348 



physical properties, 349~35i 



quartz pebbles in, 43 



soluble salts in, 77 



specific gravity of, 114 



i Cohansey formation, definition of 



term, 137 



fossils, 138 



Cole, David E., clay deposit of, 508 



Color of clay, no 



Collingswood, clay near, 45, 397 



Colluvial clays, 7, 343, 344 



physical properties of, . . . .345, 348 

 Columbia, S. C, experiment on clay 



from, 70 



Columbus, clays near, 387 



Columbus sand (Clay Marl III) 156 



Common brick, see also Brick, 217 



Compounds in clay and their effects,. 53 



Conduit industry, New Jersey, 284 



Conduits, 283 



clays used, 284 



manufacture of, 284 



shrinkage, 284 



temperature in burning, 105 



Conners, George, clays of, 493 



Concretions in clay, 23 



Conrad, clay near, 402 



Consolidation of clay deposits, 22 



Continuous kilns, 341 



Cooperstown, clay near, 397 



Coxe, Dr. Daniel 304 



Cramer, experiments by, 70,101 



Cretaceous formation, clays of, .... 149-203 



Crossman, J. R., clay pits of, 



45i. 452, 456, 459 



Crcrssman's dock, section near, 180 



Crosswicks, clay at, 383 



Crushing tests of brick, 251-256 



Cumberland county, clays of, 408-417 



clay-working industry of,... 417 



Cushman, A. B., 83 



Cutter, W. H., clay of 



442, 443, 453,454,464 

 faulting in clay pits of, 16 



