Geology and Mineralogy. 243 
steam that constantly envelop it from sight, but while in erup- 
tion the column ap eared to be about 200 feet in diameter and 
ground and the bed of the river for a hundred yards on all sides. 
Its character as an eruptive geyser was first pointed out by the 
distinguished mountaineer, Mr. John Baronett, who named it in 
honor of General Sheridan in 1881.” 
2. Report on the Thermal Springs of the Yellowstone National 
Park ; by A.C, Puate, From the 12th Annual Report (for the 
an extended bibliography, or list of papers on the Park and o 
merican and foreign thermal water: 
The following notes are cited from its pages. The total 
height of 200 feet, or beyond: the Giant, 200; Castle, 200 ; 
Grand, 200; Giantess, 250, and Beehive, 230. The jet of Old 
Faithful is stated at 150 feet. 
unsen’s theory of the action of geysers is accepted (after a 
Consideration of other views), as in the main sufficient. But 
i them which require special 
explanation. For example, in Old Faithful and Beehive, the 
g 
of steam emission; whereas in Castle Geyser, the type of 
another class, the water eruption is followed by a steam period 
of considerable length. In still others, under ea 
