whole time. The main force of the upper geyser was exerted 
near its south-east rim. There was a grand exhibition of 
energy which lasted near, three -fourths of an hour, stopping 
occasionally for short intervals. Huge whirling masses of 
water were tjhrown into the air breaking to gragments and 
falling toward all pax*ts of the compass. One does not dare 
to venture near as the jets of water reach unlooked for points 
with amazing brevity of time. The blue, deep water of the 
i 
lOYter part of the pool was thrown into a great state of 
agitation and rushed with great force through the narrow 
gateway into the lower ^asin. Great quantities of water 
surged over the low ridges of deposit and turned down the 
slope into the pools again. The straighten jets were fre- 
quently thrown to the height of 30, 40 and 50 feet. (see 
sketch in notebook Ho, 2.) .at dark -there was still an 
occasional spout. lest brought me a specimen from the 
twin buttes. Gannett says they are conglomerates. 
forked awhile on wrapping specimens. Determined to 
go to Twin buttes. Crossed the. Madison near the lakes. 
Passed ovor some ridges that looked like moraines. These 
are probably however only disintegrated conglomerates 
outcrops. How the lakes are formed I cannot say. Grossed a timber 
ed space and afterwards a meadow in which are a number of hot 
springs. Climbed the north butte through dense young timber. 
Pound the rocks to be volcanic conglomerate similar to those 
between the forks of Madison. They lie nearly horizontal,; 
