118 



GEOLOGICAL SUR^T:Y OF THE TERRITORIES. 



ab ; tut tMrty-two hours; of course, tlie 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 ; 

 but with the three 

 smaller ones play- 

 ing at the same time 

 a great commotion is 

 excited. ]^ear this 

 little group are sev- 

 eral large boiling 

 springs, which 

 throw up the water 

 in the center 2 to 

 4 feet. These are 

 funnel-shaped, with 

 orifices 6 inches to 

 _ "2 feet in diameter, 

 in basins 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 

 laminre of silica, and rounded off, rise four chimneys of different sizes, 

 which are geysers, though perhax)S not spouting extensively at this 

 time. One is 12 



CRATER FORMS, F ! R E-H OLE D A S 1 N. 



Fig. 50 





/!!f/r. 





I' ^'^. 



inches high, nearly 

 circular, and 3 feet 

 in diameter; the 

 second is oblong, 

 4 by G feet, with 

 rather coarsely 

 scalloped margins, 

 with an aperture 

 about 15 inches in 

 diameter; the third 

 chimney is about 

 3 feet high, feet 

 at the base, with 

 an orifice nearly 

 quadrangular, 12 

 inches across, with 

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

 pearl}' 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 l>een 

 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. 



