vegetation. (See sketch in large book). Beyond this 
is the bogus lake arm which turns out to be a separate 
lake between which and the lake proper is a wide 
belt of timber, a bay of rounded shore line ex- 
tends outward toward this little lake however, and 
no doubt aided in deceiving the gentlemen who 
first sketched the lake. The timber is dense end 
heavy. The hills are low. 
The rocks in the face of the butte are chiefly 
gray trachytes with seams or spots of pinkish, 
purple, gray and orange. Host of the rocks is of 
very low specific gravity, especially so a piece 
from the summit which had been brought of by a root 
of pine tree. Much of the rock has a sinuous 
lamination which gives it an appearance of schist 
rock. In other- places the mass- of the rock seems 
to be an aggregation of spherical crystals from 
the size of a pea down. Geyser observations are 
omitted. 
Rustic Geyser. This geyser, the only one of 
any consequence in the Heart Lake basin, is sit- 
uated over this northern border of the thermo 1 
basin, on gently sloping ground. Mthin a few 
yards of this border the forest and steep mountain 
slope commences. The area covered by the silicious 
deposit is about 32 feet In diameter, being a circle 
