March, 1919] Temperatures of Ten Thousand Smokes 



273 



came from this area. On arriving, we found the whole area on both 

 banks of the creek steaming. Most of the orifices were minute, but 

 after a search of several minutes, we found one large enough to receive 

 the thermocouple, where we found a temperature of 432° C, the highest 

 we observed anywhere in the Valley. The deposits were very hard 

 white material, but the throats were invariably purplish brown, with 

 occasional small masses of deposit resembling blue or green glass. Other 

 crevices round about gave temperatures of 392° C. and 382° C. Photo- 

 graphs 3744, 3745, 4144, 4145 (See page 276). 



Photograph by Paul R. Hagelharger 

 FUMAROLE 22. 



This fumarole was about eight feet in diameter. The main column of steam did 

 not condense until twenty feet from the opening. With the thermocouple 

 hung over the windward side of the hole, as in the picture, we obtained a 

 temperature of 343° C. 



To. 34. T. 159° C. Ill, N 14 E. IX, N 34 E. Baked Mountain, 

 S ()6 E. 



Between Fumarole 33 and Camp VIII we followed the easterly bank 

 of the River Lethe Canyon and recorded a temperature of 159° C. in 

 one of the many steam masses so conspicuous along this stream. We 

 stopped at a number of openings that gave a temperature of only 100° C. 

 We noticed no conspicuous deposits in this vicinity because the area 

 was covered with a thin layer of wind-blown ash. 



