wnership of mineral resources, 343-345
quantitative feature of mineral production, 60-66
relative position in regard to supplies of minerals, 396-400
tendencies toward nationalization of mineral resources, 345-346

United States Bituminous Coal Commission, 376

United States Bureau of Mines, activities in the war, 406
literature or international mineral relations, 403

United States Geological Survey, activities in the war, 406, 407
classification of mineral lands, 310-311
employment by, 428
literature on international mineral relations, 403

United States Shipping Board, 356, 406

Uranium ores, 55, 263-264, 397

Utah, arsenic, 250, 251
asphalt and bitumen, 152
bismuth, 253
copper, 37, 42, 47, 55, 199, 203, 204, 207, 208, 314
gold, 222, 314
lead, 42, 211, 212
manganese, 55
oil shales, 151
phosphates, 105
potash, 112, 114
silver, 42, 55, 234, 235
uranium and radium, 55, 264, 265
vanadium, 55, 187-188

Utah, ore deposits, relation to intrusive stocks, 44

Vadose zone, 70

Valuation of Lorraine iron ores at Peace Conference, 364

Valuation of mineral resources, 81, 328-341, 396

Value, capital, of mineral resources, 64, 328

Value of United States mineral production and imports, 62

Value of world mineral production, 62-63

Vanadium ores, 55, 187-188, 398

Van Hise, C. R., 367, 374

Van Hise, C. R., and Leith, C. K., 56, 324

Vein, application of legal term to diverse mineral deposits, 350

Venezuela, asphalt, 152, 153
magnesite, 191-193
petroleum, 128
phosphates, 105

Verde district, Arizona. _See_ Jerome district.

Vermilion district, Minnesota, iron ore outcrops, 312

Vermont, granite, 82
marble, 83
serpentine, 83
slate, 85
talc, 299

Virginia, arsenic, 250, 251
emery, 268
manganese, 175
millstones and buhrstones, 269
pyrite, 108
talc and soapstone, 299, 300
titanium, 190
zinc, 54-55, 219

Virginia City, Nevada. _See_ Comstock Lode

Volcanic ash, use as abrasive, 270

Wabana, Newfoundland, iron ores, 52-53, 160, 166

Wales, coal, 126

War, anti-conservational effects of, 365-366
application of geology to, 405-412
effect on ad valorem valuations, 335

War Industries Board, 356, 406

War Minerals Committee, 406

War Trade Board, 356, 406

"Wash," use in tracing