202 EEPOKT UNITED STATES GEOLOGICAL SURVEY. 



The intervals and duration in tabular form are as follows : 



Ifumber. 



Duration. 



Interval. 



1 



m. s. 

 1 15 



30 



1 05 



55 



1 00 

 55 



m. 8. 



2 





3 



13 45 

 18 20 

 17 40 

 22 05 



4 



5 



6 





As far as these observations go they seem to point to a considerable 

 uniformity in the action of this geyser. They may represent the fre- 

 quent periods which so many geysers have. 



At 3.15 p. m. on September 10 I saw from a distance an eruption of 

 some geyser in this neighborhood. The column appeared to reach a 

 height of at least 100 feet, so that I am rather uncertain about its being 

 this geyser, although it may have been one of its regular eruptions. 

 Dunraven, speaking of a geyser in this group, says : 



In the largest basin are two apertures, and by one or both of these the water is con- 

 stantly heaved up in a great rounded mass, like a huge bubble. The diiferent basins 

 are not in connection with each other. I was fortunate enough to see one of them in 

 a state of great activity, but I was St some distance, and although I made all possible 

 haste, the eruption, which only lasted a few minutes, had ceased before I arrived at 

 the spot. The volume of water ejected appeared enormous, and I judged the height 

 of the jet to be about 150 feet. I supposed this to be the Grand Geyser, but I see that 

 Professor Hayden locates it at the other side of the river.* 



The basin that Dunraven describes is without doubt the basin of Ko. 

 7, but whether the eruption is of that spring or of No. 5 I am uncertain, 

 although I am of the opinion it is the latter, which I am also inclined to 

 think is the one I saw in action from a distance. 



This geyser (No. 7) is also the one mentioned by Professor Comstock 

 when describing the Pyramid. He says : 



Near its base are several fumeroles and one fair-sized, boiling or spouting, which pos- 

 sesses on a small scale all the essential characteristics of some of the simpler geysers.t 



It seems, therefore, that No. 7, which I have named the Comet, is a 

 rather constant spouter, but there is also in its vicinity a geyser that 

 is first class in its action. Whether it is No. 5 remains to be determined 

 by future investigation. 



Springs 8-13 Avere mapped and descriptions partially taken when we 

 were obliged to leave the basin. These temperatures were therefore not 

 obtained. 



No. 14. White Pyramid. — This conspicuous mound of white geyserite 

 is back of the springs just described, and is a little over 500 yards from 

 the river, about due west of the Giant. It is 200 yards from the main 

 cluster of springs in the group, to which I have given its name, and most 

 of the drainage from them passes it, going northward to flow into the 

 Pire Hole below the cascades, where it again turns to the northwest. 

 Judging from its size (it is 25 feet in height), it has once been a power- 

 ful geyser, but at i^resent doubtless spouts very seldom if at all. A 

 gurgling can be heard in it and steam escapes almost continually, but 

 there is no evideucje of recent activity. It has probably closed its vent 

 bj^ the gradual deposition of silica. It is pyramidal in form and stands 

 out boldly against the dark evergreens that are back of it. 



* The Great Divide, p. 274, 



tUeconnaissance of Northwest Wyoming, by Capt. W. A. Jones, in 1873, p. 233. 



