INDEX. 
507 
Page. 
Lee shaft, location of. 389 
veins at, section of, figure showing. 390 
Lee veins, location and description of. 157, 
174,440, 441,443,444,448 
Legal Tender mine, ore bodies in. 212 
vein structure in, figure showing. 160 
Legal Tender vein, location and description of... 426-427,429 
Leucite, occurrence of. 67-68 
Leucitophyre, occurrence of. 67 
origin of. 56 
petrology of. 67-68 
Lexington mine, ore of. 296 
veins of. 294,306 
Lillian Leland claim, location of. 291 
Lillie Gold Mining Company, mine of. 424 
Lillio mine, description of. 424 
dipin. 156 
history of. 145 
location of. 5,149,408 
ore of. 424 
production of. 149,424 
veins of, character of. 206,424 
section of, figure showing. 423 
water level in. 240,244,245,246,424 
change in, figure showing. 242 
workings of. 151,244,408,424 
Lillie vein, character of. 206,277,278 
Lillie-Vindicator shoot, length of. 206 
Limonite, description of. 123 
occurrence of_ 4,55,114,183,199,200,202,283,285,286,391 
Lincoln mine, location of. 151 
Lincoln Mines Mining and Milling Companj T , mines of. 283 
Lincoln vein. See Virginia M. vein. 
Lindgren, Waldemar, work of. 14,42 
Lindsay vein, location and description of. 360 
Literature on the district. 15-17 
Little Annie Rooney claim, location of. 297 
Little Clara claim, location of. 314,347 
Little Grant claim, location of. 314 
Little Joe claim, location of. 387 
Little May mine, minerals in.'.1. 116 
ore of. 354 
Little Montana claim, location of. 487 
Little Pedro claim, location and description of. 288 
Little Pisgah Peak, rocks of. 58 
Lode fissures, area of. 153-155,167 
character of. 155 
convergence of. 155,167 
description of. 6,153-168 
dip of_-. 156 
direction of. 155-156 
plate showing. 154 
distribution of. 153-155 
filling of. 173-182 
influence of country rock on. 159-160 
intersections of. 156,165-167 
minerals in. 114-129,173-176 
origin of. 167-168 
persistency of. 156 
sheeted structure of. 155 
See also Sheeted zone. 
structure of. 160-165,176-182 
width of. 153 
See also particular mines; Veins; Ore deposits; 
Gold deposits; etc. 
Logan mine. See John A. Logan mine. 
Logan vein, character of. 381 
Page. 
Londonderry mine, location and description of. 367 
London vein, character of. 456,463 
Los Angeles mine, location and production of. 380,383 
| Lost Anna vein, location and description of. 120, 
121,174,442,443 
I Lovenite, occurrence of. 219 
Lovett vein, location and description of. 198,367-368 
| Lowell shaft, location and description of. 433 
Lower Trail tunnel, rocks in. 33 
Lucky Dick claim, location of. 478 
| Lucky Gus mine, ore of. 383 
production of. 380 
• rocks in. 30,98 
vein in. 382 
workings of. 382-383 
Lunge, -—, air-testing device of. 253 
Lyons shaft .location of. 399 
M. 
Mabel M. mine, location and description of. 358-361 
minerals in. 116 
veins of. 360-361 
water in. 361 
workings of. 358 
Maggie claim, location of. 466 
Maggie prospect, dike on. 368 
Magmas, crystallization from, products of. 101 
differentiation of. 3,113 
Magna Charta claim, location and description of. 286 
Magnesium, presence of, in vein-forming water. 222 
Magnetite, description of. 123 
occurrence of. 48, 
49,52,64,67,77,78,81,83,99,114,185,188,192,193,194 
Main vein, location and description of. 417,420-421 
Mallardite, description of. 126 
occurrence of. 114 
origin of. . 201 
Maloney vein, location and description of . .. 292,294,296-297 
section of, figure showing. 296 
Maloney shaft, location of. 396 
Mammoth claim, location of. 478 
Manganese, occurrence of. 203,285,366,374 
Manganese vein, location and description of. 211,373-374 
Map of district. Pocket 
revision of. 1,11-12 
Map, geological, of district. Pocket 
of Portland mine. 434 
Man, index, showing location of district. 12 
Marcasite, description of. 120 
occurrence of. 114 
Maroon Tunnel Company, mine of. 404 
Mary Ann mine, description of. 347 
ore bodies in. 211,305,347 
Mary Ann Mining Company, mine of. 347 
Mary Cashen mine, vein of. 489 
Maryland claim, location of. 298 
Mary McKinney Company, mine of. 322 
Mary McKinley mine, description of. 321-330 
dip in. 156 
drainage of. 237,321 
gas in. 261 
geology of. 322,323 
history of. 322 
location of. 5,148 
minerals in. 120,128,174,185 
ore deposits in. 206,210,213,327,329 
