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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 thrown into the air breaking to gragments [[sic]] and falling toward all parts 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 lower part of the pool was thrown into a great state of agitation and rushed with great force through the narrow gateway into the lower basin. Great quantities of water surged over the low ridges of deposit and turned down the slope into the pools again. The straighter jets were frequently thrown to the height of 30, 40 and 50 feet. (see sketch in notebook No. 2.) At dark gthere was still an occasional spout. West brought me a specimen from the twin buttes. Gannett says they are conglomerates.
 
     Worked awhile on wrapping specimens. Determined to go to Twin buttes. Crossed the Madison near the lakes. Passed over some ridges that looked like moraines. These are probably however only disintegrated conglomerates outcrops. How the lakes are formed I cannot say. Crossed a ^[[timber]]ed space and afterwards a meadow in which are a number of hot springs. Climbed the north butte through dense young timber. Found the rocks to be volcanic conglomerate similar to those between the forks of Madison. They lie nearly horizontal;