164 F. V. Hayden—Hot Springs and Geysers 
shaped crater is formed with a cireular rim varying from a few 
inches to several feet in diameter. Some of these funnel-shaped — 
Hot Sprine. 
chimneys extend out into the lake several feet, and the hot spmlg 
deposits may be seen through the clear depths for fifty yards 
Bubbles may be seen on the surface of the water some distance 
from the shore in many spots and show the presence of a spring 
beneath. vay 
The same variety of colors, quiet springs, mud springs, old 
ruins, &c., that we have before described, occur here. No gey: | 
sers were observed, but the group of mud springs keep Nee 
constant thud-like noise, which can be heard with great distinct: 
ness for half a mile . ‘ 
On the east and northeast sides of the lake are a number? 
groups of living or dead springs. High up on the sides of the 
mountains are two quite extensive patches of the siliceo e 
deposit, which look in the far distance like an immense bank 0 
snow. They are called by the mountaineers, brimstone ar 
The large double basin on. the southeast arm was once Covel” 
with hot springs, though at the present time, there is 20 hea 
there with temperature above ordinary spring water. re 
_quantities of sulphur are mingled with the silica, and henee 
. ¥ 
name. 
At Steamboat Point there are two vents which keep §P™ 
up among the foot hills of the mountains, a mile or tW° aie 
the lake. One of the most conspicuous of these great W ni 
hills, seen from all sides of the lake, is called Sulphur Mount | 
it is located on the side of the mountains at the north en© ~~ 
