118 



GEOLOGICAL SUEVEY OF THE TEERITOEIES. 



about thirty-two hours ; of course, the displays could not be exactly 

 periodic, but it would be an interesting study to remain several 

 days and watch carefully the movements of such a power. Just 

 east of the Grand Geyser, as located on the chart, is a moderate- 

 sized geyser, with three smaller ones along the .side of it, all playing 

 at the same time. From the larger one, a column of water is 

 constantly shot up 15 or 20 feet, with much the sound of the escape 



of the steam from 

 ^^- ^^' a pipe. The orifice 



is not more than 6 

 inches in diameter 5 

 but with the three 

 smaller ones play- 

 ing at the same time 

 a great commotion is 

 excited. JSTear this 

 little group are sev- 

 eral large boiling 

 springs, which 

 throw tip the water 

 in the center 2 to 

 , _4 feet. These are 

 i>^^ funnel-shaped, with 

 _ orifices 6 inches to 

 _ 2 feet in diameter, 

 in basius with near- 

 ly circular rims, 15 

 to 40 feet in diameter. About one-fourth of a mile northeast of the 

 castle, upon a mound about 30 feet above the river, built up with thin 

 laminae of silica, and rounded o^, rise four chimneys of different sizes, 

 which are geysers, though i^erhaps not spouting extensively at this 



;ATER forms, FIRE-HOI.C I! A S I N. 



Fig. 50. 



time. One is 12 

 inches high, nearly 

 circular, and 3 feet 

 in diameter ; the 

 second is oblong, 

 4 by 6 feet, with 

 rather coarsely 

 scalloped margins, 

 with an aperture 

 about 15 inches in 

 diameter; the third 

 chimney is about 

 3 feet high, G feet 

 at the base, with 

 an orifice nearly 

 quadrangular, 12 

 inches across, with . 

 the spongiform masses inside, and covered all over wi^h beautiful 

 pearly beads of silica on the outside; the fourth chimney rises 5 feet 

 above the mound, is 10 feet in diameter at the base, with an orifice 

 2 feet across, lined inside with the spongiform masses. This has been 

 at one time a first-class geyser, but is now fast going to decay, a beau- 

 tiful rim. The elegant bead- work on the margin and all the spongi- 

 form masses are now falling into pieces, forming great quantities of 

 debris around the base of the mound. There is also one boiling spring 



THE BATH-TUB. 



