INDEX. 
Mount Pleasant, near Gibsonville, 450. 
Mount Whitney, altitude of, 28. 
characteristic form of, 506. 
Mount Zion, 405, 406. 
Mud Springs, 86, 88. 
Mugginsville, near Brandy City, 463. 
Muletown, 88, 102. 
Mumford’s Hill, 476. 
Murchison, Sir R. I., his views in regard to the age of the 
gold-bearing rocks of Calfornia, 34. 
his views in regard to gold, 355. 
Murphy’s, locality of vertebrate fossils, 254, 257, 275. 
Myers’s Ravine, near Nevada City, locality of implements in 
gravel, 277. 
Nahor’s Claim, in Green Valley Gorge, 83, 89, 91, 113. 
Nary Red Mine, 152, 153. 
Neanderthal skull, a reference to, 273. 
Negro Hill, near Placerville, 100. 
locality of fossil wood, 238. 
Nelson Point, 470. 
Nevada, Triassic fossils from, 39. 
Nevada City, vicinity of, 186-191. 
Nevada Claim, Bottle Hill, 111. 
Nevada County, implements in gravel from, 277. 
Nevada Hydraulic Mining Company at You Bet, 422. 
Nevada Reservoir Ditch Company, 380. 
Newberry, J. S., cited, 227. 
New Jersey Claim, at Forest Hill, 94, 106, 118, 114. 
Newtown, white lava near, 223. 
New York Cafion, above Sailor Flat, 415. 
Niagara Consolidated Company, north of Slate Creek, 450, 
451. 
Nickel, native, in gold washings, 366. 
Niece & West’s Mine, south of You Bet, 166. 
Nick Anderson’s Claim, near Last Chance, 92, 105, 110. 
Nigger Ravine, in Manzanita Hill, 157. 
Nonatore, Cliffs of, 126. 
North Bloomfield, ditches, 198. 
North Bloomfield and Eureka, district between, 399-406. 
North Bloomfield and San Juan, district between, 391-398. 
North Bloomfield Gravel Miuing Company, financial exhibit 
of, 397. 
Northeastern North America, absence of nearly the whole 
geological series in, 319. 
Northern Coast Ranges, geology of, 23. 
North San Juan and French Corral, region between, 385-390. 
North Star Claim, Iowa Hill Ridge, 116. 
North Star Tunnel, near Grass Valley, 183. 
North Fork Company, at Forest City, 436-438. 
Nuggets, their form and size discussed, 357-360. 
large ones found in California, 359. 
synonyms for, in various languages, 356. 
size of, not likely to have been increased by chemical 
means, after liberation from the quartz, 360. 
Oak Flat, near Chips’s, 435. 
Oak Grove, near Volcanoville, 96. 
Oak Springs, locality of Mastodon obscurus, 252. 
563 
Oak Tree Ranch, 390. 
Ocean, not the erosive agent of gravel period, 336. 
Ohio Flat, near Forbestown, 383. 
Old Amador Mine, 89. 
Oldfield Claim, near Placerville, 100. 
Omega, 409, 410. 
Omega and Relief Hill grade between, 408. 
One Thousand and One Tunnel, Chips’s Hill, 443. 
Onion Valley, 307. 
Order of succession of volcanic rocks, 523. 
Oregon Gulch, near Oroville, 483. 
Oregon Hill, near Nevada City, 188. 
Ores and minerals associated with gold, 361-367. 
Orleans Flat, 200, 403. 
Oro, near Todd’s Valley, 90, 95. 
Orographic causes, in relation to gravel, 317. 
Oroville, exposures of Cretaceous, to north of, 51, 52. 
map of vicinity of, 479. 
Table Mountain near, 207. 
Oroville and Cherokee Flat, vicinity of, 479-487. 
Osborn Ravine, in Quaker Hill, 179. 
Oshawa Tunnel, near Camptonville, 431. 
Ovifak, Greenland, native iron from, 366. 
Owen’s Valley, voleanic rocks in, 312. 
Oxidation, from exposure to air and moisture, 332. 
Pacific, The (newspaper), in regard to the Calaveras skull, 270. 
Pactolus Claim, 381. 
Pan, the, its use in gold washing, 58. 
Paleozoic age of gold, Murchison’s views, 355. 
Paragon Mine, at Bath, 94, 107, 114, 118. 
Pearl’s Hill, near Smartsville, 195, 383. 
Peckham Hill, 108. 
Pence’s Ranch, Carboniferous fossils at, 38. 
interesting exposures of rocks at, 52. 
Pen, gold, use of iridosmine by makers of, 365. 
Permanence of the hydraulic mines, remarks on, 375. 
Photograph rocks, dentritic markings, 224. 
Petroleum, attempts to find flowing wells of, 19. 
Pettee, Professor W. H., field of his explorations, 80. 
Pierce, Llewellyn, ‘certifies to finding stone mortar under 
Table Mountain, 266. 
Pilarcitos Valley, locality of fossil ox, 247. 
rain-fall in, 13. 
Pilot Hill, 98. 
Pinart, A. L., discovers Alpine Trias on the Alevtian Islands, 
39. 
Pine Grove, on divide between Slate and Cafion Creeks, 457. 
Pine Hill, near You Bet, 164, 165. 
Placer County, human relies in, 277. 
Placerville, vicinity of, 86, 111, 120. 
direction of channels near, discussed, 500-504. 
region above, on Carson Road, 105. 
Plants, fossil, age of gravels deduced from, 283. 
of gravel series, 231-239. 
Platinum, analysis of, 366. 
occurrence of, in gravels, 362, 364-366, 487. 
Pliocene age of fossil plants, 235. 
Pliocene American River, width of, 342. 
