zonal arrangement of minerals, 42, 44

Cadmium ores, 253-254, 397

California, antimony, 248
asbestos, 271
asphalt and bitumen, 152
basalt, 82
borax, 275, 276-277
chromite, 179
copper, 199, 204
diatomaceous earth, 269
fuller's earth, 279
gold, 222, 224, 227, 229, 308, 316, 342
granite, 82
graphite, 281
grinding pebbles, 268
magnesite, 191-193
manganese, 175
mercury, 40, 256, 257, 259
natural gas, 151
petroleum, 132, 133, 135, 137
potash, 112, 113-114
pyrite, 108
serpentine, 83
silver, 234, 308
tourmaline, 293
tungsten, 183

Campbell, J. Morrow, 185

Campbell, M. R., 121, 122, 366

Campbell, M. R., and Parker, E. W., 367, 370-371

Canada, arsenic, 250
asbestos, 270-271, 272
cement, 87
chromite, 179
coal, 115, 116
cobalt, 255
copper, 197-198
corundum, 268, 270
feldspar, 86
fluorspar, 193, 194
gold, 222
graphite, 280-281
grindstones and pulpstones, 269
gypsum, 283-284
iron, 52-53, 155, 156, 160, 165
magnesite, 191-193
mica, 286, 287
molybdenum, 186
natural gas, 151
nickel, 180-182
petroleum, 128
phosphates, 105, 106
platinum, 238
pyrite, 107-108
salt, 294
silver, 232, 234-235
talc, 299, 300
titanium, 190
zinc, 214, 215

Canada, laws relating to ownership to mineral resources, 343
use of magnetic surveys in tracing iron rocks, 317

Cananea, Sonora, Mexico, copper ores, 203

Cannel coal, 125

Cape Colony, South Africa, asbestos, 272

Capillarity, effect on ground-water level, 70
effect on petroleum migration, 142-143

Capital value of mineral resources, 64, 328

"Capping," of copper ores, 47

Carbonado, 268

Carey Act, classification of public lands under, 310

Carmel, New York, arsenic ores, 251

Casing-head gasoline, 139, 151

Caucasus region, Russia, manganese ores, 174, 176

Cement, 86-88, 397

Cementation, mineral products resulting from, 24

Cementing materials, source of, 25

Central America, cement, 87, 88
silver, 232
_See also_ Costa Rica, Guatemala, Panama.

Central Powers. _See_ Germany, Austria-Hungary.

Cerium ores, _See_ Monazite.

Ceylon, graphite, 280-283 mica, 286

Chalk, 83, 398

Chamberlin, T. C., 217

Chamberlin, T. C., and Salisbury, R. D., 415

Chanc