H. 
Page. 
Helvetia and Lafayette Mining Company.269 
Hemipristis heteropleurus . ..171,172 
Heintzleman, Major, account of a mud volcano, by— 115 
Herds of antelope-- 56 
Hieroglyphics, Indian_ 56 
Horizontal water-line on the rocks_ 97 
Horizontal strata in the mining region ......259 
Hornblendic rock_ 30 
Hornblende slate__..._199 
Horse thieves, evidences of_ 53 
Hrt springs_ 83 
Colorado Desert_ 94 
at Warner’s_ 106 
Hot baths by Indians....... 20 
Humus, absence of, in the soils or plains of.*California. 39 
Hydraulic method of mining_265, 266 
I. 
Iceland spar.... 104 
Igneous rocks near San Gabriel_ 79 
of the Canada de las Uvas...211 
Ilmenite_..._274,303 
Inclined deposits on the granite at Fort Tuma_115 
Indians at Fort Miller...20, 24 
at San Felipe ...____-.105 
at the Tejon__39,40 
from Posuncula River. 35 
on the Desert_95, 98 
Indian rancherias at the Tejon_ 39 
Indian reservation... 39 
Indian feast_ 98 
Indian fig, (prickly pear). 74 
Indian method of bathing.. 20 
Incrustation on the borders of the hot springs at San 
Bernardino...-.—. 83 
Incrustation on the rocks and ridges around the Desert 99 
Infusoria at San Pedro_ 178 
beds of, at Monterey. 180 
Infiltration of ferruginous water__ 168 
Iron ore, Burns’ Creek. 14 
forming a bed in the Canada de las Uvas.--. 50 
in the limestone of the summit of the Canada. 210 
cromic.. 303 
Iron, oxide of, deposited in the strata by percolation. 168,169 
Irregular outline of the mountains... 97 
Irrigation, natural, at the Four Creeks.. 27 
at the Tejon..39,40 
at San Fernando_ 74 
of the surface of the Desert.249 
Islands in the Bay of Panama.. 3 
Islands near the coast of California_ 140 
Isthmus of Darien.. 1,2 
J. 
Jamestown. 254 
Jasper rocks...155,156 
Johnson, S'. W., description of pinite. 264- 
Page. 
Johnson’s River.._..........63, 220 
Junction of the Gila and Colorado Rivers_... 113 
K. 
Kern Lake......37,143 
elevation of... 143 
Knight’s Ferry. 254 
King’s River ............. 25 
L. 
Lacustrine clay of the desert........ 235 
Lacustrine deposits of auriferous materials___ 278 
Lagoon near San Isabel_ 126 
Lake Fork or King’s River... 25 
Lake Elizabeth... 57 
Lamination of rocks_ 200 
Laminated and gneissoidal rocks_ 124 
Lamna ornata. 152 
Lamna clavata—. 172 
Lamna elegans... 152 
Land slides... 7 
Larrea Mexicana...80,110,242 
Las Vegas. 224 
Lava, plain of, at Fort Miller... 21 
Lava, overflows of, in the Great Basin..218 
Ledasubacuta_ 174 
Lenticular masses in granite_ 106 
Lenticular aggregations in granite. 275 
Lignite, Benicia___„._ 5 
Lignite near San Francisco. . . ___ 287, 288 
Limestone, outcrops of, in the Canada de las Uvas.47,209,210 
of the Cajon Pass.. 88 
of the Tejon Pass.201,204 
and quartz rocks of San Gorgoiio_ 93 
solution of the surface of. 256 
for building purposes.....283, 284 
belt of the gold region, extent and probable 
age of_ 276 
Lime Point, rocks of.. 155 
Limonite, Burns’ Creek....—.14,290 
Littorina Pedroana.. — __ 186 
Livermore’s Valley .. 6,8 
Livermore’ s' Pass_....._-_ 8 
Looming of mountains. 108 
Los Angeles....-.-. 76 
Los Angeles, Tar Springs at.. 284 
Lost Mountains, near the Four Creeks. 27 
Lost Mountains of the Great Basin_52, 214, 217 
Lower California_ 3 
Lutraria Traskei_ 182 
M. 
Made.-.305 
Mactra albaria...173,177 
Mactra Diegoana ......176,177 
Magnesian rocks...28, 29 
Magnesite, thick beds of, in the metamorphic strata— 28 
Magnetite, Canada de las Uvas ____ 50 
Williamson’s Pass. 289 
Volcanoyille__ 7 
