192 
INDEX. 
Page 
Springs, kinds and characters of 148-152 
land watered from 30 
relation to climate, topography, and 
geology of 104-155 
similarity between wells and . _ 154 
sources of supply of 132 
temperature of, conditions regulat- 
ing 152 153 
Springs, canyon, flow of, suggestions rel- 
ative to increasing 167-168 
occurrence and features of 150-151, 
162-168 
section showing conditions favor- 
ing occurrence of 150 
temperature of L53, 154 
Springs, cavern , occurrence and features 
of 152 
temperature of . L53 
Springs, fissure, development of , sugges 
tions relative to 169-171 
flow of, suggestions relative to 
increasing 16S 
occurrence and features of 151 1 52, 
168-171 
temperature of L53 
Springs, hillside, occurrence and features 
of L49 L50 
section showing relation t<> water 
table of 149 
temperature of L52 L53 
Springs, hot, source of heat of 153 
Steptoes (Big and East buttes), examples 
of 34 
Stock raising in the region 31 32 
Streams, occurrence and features of 25-26 
upgrading of L33 L34 
Subaerial deposits, chemically formed, 
occurrence and character of. 141-145 
Subterranean waters, distribution of 148 
T. 
Temperature of the region, range in 17-18 
Temperature of springs, conditions regu- 
lating .... .. 152-154 
Tertiary beds in mountains near Boise, 
occurrence of 49 
Tertiary and Recent lacustral formations, 
occurrence and character of . . 50-59 
Tertiary sedimentary beds, possible east- 
ward extension of 59 
Thousand Springs (The), featuresof. 26-27,163 
plate showing 26 
source of , 165 
temperature of 163 
use of 162 
volume of, estimate of 27 
Topographic features of southern Idaho, 
summary of 17 
Page. 
Topography, relation of springs to 154-156 
Topography of the region, features of . . . 14-17 
Towns of the region, population and fea- 
ture s of ; 32-33 
Tree-covered lava streams, occurrence of. 107 
Turner, Scott, ol nervations made by 173 
Twin Falls, height of 28 
plate showing 124 
U. 
Uhrlaub. N., information furnished by. 127 
Underflow and run-off, conditions influ- 
encing relations of 147-148 
V. 
Vegetation of the region. 22-23 
Vesicles in bombs, gradation in size of, 
theories relative to cause of. . 77-78 
Volcanic cones in the region, occurrence 
of 37-38 
Volcanic eruptions, theories of cause of.. 89-90 
Volcanoes among the mountains, consid- 
eration of 66-71 
Volcanoes in the region, location and fea- 
turesof 71-134 
W. 
Wapi. well at. depth of 173 
Water, artesian, possibility of obtaining 58 59 
Water beneath eastern portion of the 
region, probability of presence 
of 1S3-184 
Water power in the region 28 
Water resources of the region 1 47-184 
Water supply of the region, conclusions 
relative to 184-183 
Water table, section showing relation of 
hillside springs to 149 
Waterfalls in the region, occurrence and 
featuresof 123-126 
Wedge, artesian, section of 157 
Wells, artesian. (See Artesian wells.) 
classification of 171 
deep, homology to canyon and cave 
springs of. 154 
ordinary supply of 154 
rock, occurrence and features of... 172 174 
similarity of springs to 154 
surface, occurrence and features of.. 172 
temperature gradient indicated by. 173-174 
Whirlwinds, occurrence of 19 
Whitson, B., artesian wells on ranch of, 
features of 1 75 
Wild Horse well, location and features 
of 177 
Winds, character of 18-19 
o 
