Discovery of gold in Utah, 109.

in Washington, 111.

in Wyoming, 114.
Northwest Territory, 34.
of gold and silver, 652.

of the Comstock lode, Nev., 86.
of Tonopah, Nev., 91.

on Colorado River, 22.
Ditches and flumes, 347, 361.
Douglas Island, Alaska, 176.
Drag-stone mills, 470.
Drainage, 461.
Drake, Sir Francis, 28.
Dredging, 74, 98, 389.

capacity of buckets, 400.
interior work, 397.
tailing disposal, 399.
Dredgers, 348, 393, 400, 401.
Drift-mining, 383.

Drilling in drift mines, 388.
Drills, power, 356.

Drumlummon mine, Mont., 241.
Duncan mine, Canada, 195.
Dutch Flat, Cal., 309.

Duty of miner's inch of water, 365.
Dynamite, 356.

East lode, Cal., 191.

Effect of temperature on solubility,
157, 158.

Elevator, hydraulic gravel, 355.

Electricity and mining, 15, 61, 354.
Elkhorn district, Mont., 259.
Elkhorn mine, 83, 242, 259.
Emma mine, Utah, 107.

Esmeralda district, Nev., 89, 90.
Esquimaux, Alaska, 23.

Eureka district, Nev., 89, 90, 247.

Explosives, introduction in mines, 352.
Extraction of values, 469.

historical sketch, 470.

methods of, 496.

Franklin mine, Ga., 423.
Fraser, John, 59
Fraser River, B. C., 36.
Frozen gravels, 375.
Frue Vanner, 481.

Fuller placers, Colo., 311.
Furnace, O'Hara, 489.
Bruckner, 489.
Pardee, 489.
Stetefeldt, 489.

General discussion of ore-deposits, 164.
Geology of Colorado, 201.
Geology of Comstock lode, 244.
Geological distribution of gold and
silver, 329, 682.

Georgia, 21, 22, 71, 161, 223, 312.
Franklin mine, 423.
Glory Holes, 354, 447.
Gold Run, Alaska, 23.
Gold Hill, California, 59.
Gold Coin mine, Colo., 68.
Gold Cañon, Nev., 85, 87.
Gold in the sea, 154.
deposition of, 159.
float, 501.

in clay, 260, 323.

in gravel, 163, 290, 293.
in shale, 276.

mineral associates, 167.
nuggets, 275.

peculiar occurrence, 166.

Gold Mountain district, Nev., 252.
Goldfield, Nev., 251.

Golden Age mine, Colo., 217.
"Goober" pea, 173.

Grand Encampment, Wyo., 279.

Granite Mountain mine, Mont., 167.
Grash Bros., 87.

Grass Valley, Cal., 59, 155, 188.
Gravels, frozen, 375.

at Nome, beach, 46.
formation in Cal., 304.

in California, beach, 59, 307.

in California, 302, 347.
in Coca Creek, Tenn., 264.
in Colorado, 310.

in Georgia, 161, 313, 314.

in Idaho, 73, 74, 315.

in Illinois, 318.
in Indiana, 75, 318.
in Iowa, 318.

in Missouri, 81, 319.

in Montana, 82, 83, 319.
in Nevada, 85, 320.
in Nebraska, 84, 320.
in Oregon, beach, 98, 295.
in Porto Rico, 99, 260.
in South Dakota, 102, 325.
in the Philippines, 260.
in Vermont, 110, 326.

Kentucky, 77, 233.
Kern River, Cal., 60.

Ketchikan district, Alaska, 48.7
299.
Keweenaw Point, Mich., 39, 79, 237
King, Clarence, 329.
Kino, Father, 22, 29.

Labor and mining, 10.
Lake Superior Region, 36.
Lake Valley district, New Mexico, De
Language, Cal., Ore., etc., 4.
La Prouse, 34.

La Plata mine, Colo., 222.
Larkin, T. O., 33.

Leadville, Colo., 29, 169, 310.
Legends, 20, 24.

Leon, Ponce de, 26.

Lindgren, 155, 239, 205, 282, 284, 2.

Macfarlanite, 195.

Maine, 77, 235, 645.

Mammoth mine, Ariz., 184.

Colorado., 242.

Utah, 271.

Marshall, J. W., 55.

Maryland, 78, 236.

Marysville district, Mont., 241.

Massachusetts, 79, 236, 645.
Masses of gold, 161, 185.
Matteson, E. E., 60, 344.
McLeod, 34.

Mercur mines, Utah, 107, 108, 267, 41
Mercury traps, 516.

Merrimac mine, Mass., 237.
Mesozoic rocks, 336.

Metallurgy, 527.

Mexican methods of mining, 350.

Mexicans, 30, 32, 33, 53.

Mexico, mines in, 27, 28, 165.

Michigan, 646.

Milling, 496, 509, 512, 523.

Mills, tube, 498.

Colorado, 485.

first quartz, in Cal., 189.

Mining, 1, 340, 352, 354, 356, 413.
and finance, 12.

and science, 14.

bedded deposits, 441.

drift, 383.

electricity in, 15.

hydraulic, 12, 60, 71, 106, 189.
in Alaska, 47.

Narvaez, Pamphilo, 22.

Nebraska, 84, 320.

Nevada, 85, 91, 243, 320, 614.
Combination mine, 354.
De Lamar, 92, 93, 317.
Potosi mines, 89.

New Hampshire, 93, 253, 647.
New Jersey, 94, 253.

New Mexico, 94, 254, 321, 622.
New York, 95, 256.
Niccolite, 195, 196.

North Fork Dry Diggings, Cal., 58.
Nova Scotia, 288, 649.
Nuggets, gold, 275.

Occurrence of gold and silver, 151, 165,

171, 174, 184, 194, 201, 238, 241,
244, 257, 265, 266, 271, 278, 289.
and association of gold and silver,
660.

in gravels, 289, 293.

in masses, 161, 185.

Ohio, 96, 321.

Oklahoma, 96, 256.

Old Telegraph mine, Utah, 269.

Older crystalline rocks, 234.

Omercia, B. C., 36.

Ontario mine, Utah, 109.

Ontonagon, Michigan, 278.

Organ Mountains, New Mexico, 95,

255.

Oregon, 97, 163, 257, 322, 625.

Packard, L. R., 21.

Park City, Utah, 273.
Pearl district, Idaho, 231.

Pearce mine, Arizona, 52, 179, 182.

Pennsylvania, 99, 260, 323.

Permanency in depth, 16, 280.
Philippines, 260, 324.

Phillips, W. B., 41.
Pineda, 22.

Pinal Mountains, Arizona, 180.
Pipes for hydraulic mining, 367.
Placers, 48, 59, 60, 61, 67, 71.

formed by landslides, 292.

Pocket mines of California, 60, 171.
Poorman mine, Idaho, 229.
Population of California, 3, 11.
Porto Rico, 99, 260, 324.
Portland mine, Colo., 209.
Posepny, Franz, 152.
Potosi district, Nev., 89.
Presidio mine, Texas, 105, 264.
Production of ores and metals, 8, 13,

14, 17.
Alaska, 583.

Arkansas, 644.
Arizona, 589.

biggest mines, 574.

by states and territories, 578.
California, 592.
Canada, 596.
Colorado, 597.

copper mines, Cliff mine, 39.
estimates of, 575.
gold and silver, 553.
Idaho, 605.

Indiana, 644.

Iowa, 645.

Maine, 645.

Massachusetts, 645.

Michigan, 646.

Minnesota, 646.
Montana, 610.
Nevada, 614.

New Hampshire, 647.
New Mexico, 622.
Oregon, 625.
other states, 643.
southern states, 578.
South Dakota, 621.
Texas, 647.
the world, 564.
United States, 557.

Utah, 634.
Vermont, 647

Rabbit, Mountain district, Canada, 38.
Rainy Lake district, Minn., 80, 239.
Randsburg district, Cal., 61, 192.
Ransome, F. L., 284, 286.
Raymond, Captain, 35.
Raymond, R. W., 19, 574.

Red Point drift mine, Cal., 309.

Red ores, Isthmus of Panama, 233.
Reduction of ores, 496.

Reed mine, North Carolina, 199.
Reed nugget, 62, 189.
Refractory ores, 166.

Relation of values to depth, 289.
Renewal of gold in gravel, 289.

Republic mine, Washington, 111, 276.
Rickard, T. A., 64, 154, 264, 552.
Rico, Colo., 216.

Riffles, 371.

Rio Grande, 29.

River-mining, 189, 347, 379.

Road building in Cal., and Alaska,

etc., 7.

Rockers, 342.

Rolls, Cornish, 476.

Ropes, Julius, 79.

Ruby gravel mine, Cal., 162.
Ruby Hill, Nev., 248.

Rudefeha mine, Wyoming, 114.
Russian American Co., 36.

Samplers, Colo., practice, 528.
San Juan, Colorado, 202, 212.
San Xavier del Bac, 29, 94.
Santa Fé, New Mexico, 29.
Santa Rita, 30, 49, 94.

Saratoga district, Wyoming, 279.
Schiefflin, 44, 50.

Science and mining, 14.
Selenium, 168.

Sets, timber, 452.

Seven Devils camp, Idaho, 232.
Seward Peninsula, Alaska, 175.
Sheep Creek Basin, Alaska, 176.
Sheppard, Prof., 37, 38.
Sheridan mine, Colo., 220.
Sierra de Mogollon mines, 95.

Silver, 29, 37, 38, 168, 203, 233, 235,

238, 240, 260.

in clay and sandstone, 273.

Silver in shale, 276.

mines of Michigan, 79.

native, 194, 195, 237.

Silver Hill, North Carolina, 198, 201.
Silver Valley, North Carolina, 198.
Silver City district, Idaho, 229.
Silver Mountain district, 38.

Silver Islet, Canada, 38, 194.

Silver Reef, Utah, 108, 273.

Silver King mine, Arizona, 51, 107,

180, 226.

Silver Cliff mine, Colo., 219.

Silverton district, Washington, 278.
Six Mile Cañon, Nev., 86.

Sluices, 343, 371, 374.

Smelting, pyritic, 486, 527, 529.

Boston and Colorado works, 487.
in Colorado, 88.

Smith, Capt. John, 110.

Smuggler-Union mines, Colo., 67, 220.
Snake river gold, 316.

Solubility of mineral matter, 155, 158,
159, 161.

South Dakota, 102, 262, 325, 484, 621.
mills, 484.

Spaniards, 21, 29, 31.
Square sets, 453, 457.
Stamps, 473.

first in California, 473.
first in Nevada, 474.
Howland circular, 475.
in Colorado, 491.
steam, 12.

use of, 497.

Stanford, C. P., 475.

Standley mine, Colo., 218, 425.

Stewart River, B. C., 45.

Stratton, W. C., 68.

Stratton, Independence, Colo., 209.

Stulls, 451.

Sulphide of gold, 161.

Sulphur Creek, California, 193.

Sulphurets, 479, 483, 487.

Sutro, A., 353.

Tabbott, J. F., 344.

Table Mountain, 348.

Tailing mills, Comstock lode, 488.

Telegraph expedition, 42.

Tellurium, 166, 168, 264.

Telluride, Colorado, 220.

Tellurides of gold and silver, 168, 169,
186, 203.

Tennessee, 104, 264, 326.
Tertiary rocks, 338, 343.
Tetrahedrite, 168, 181.

Texas, 22, 105, 264, 326, 647.
Theory of ore-deposits, 151.

Thunder Mountain district, Idaho, 230,

317.

Thunder Bay, 37.