March, 1919] Temperatures of Ten Thousand Smokes 277 



immense volume of steam coming from it. In the pictures, this and the 

 next appear as one opening. The temperature recorded from it was 

 171 C. This was obtained by hanging the thermocouple over the edge 

 -of the cavity, and does not in our opinion correctly represent the tem- 

 perature. It was, however, the only place accessible with the wind 

 in the southeast, as it was when we visited it. 



No. 47. T. 309 C. 50 feet south of No. 46. 



This fumarole was on the same line of activity and similar to No. 46, 

 except perhaps that the opening was larger and emitted a greater volume 

 of steam. This one was easier to work with because the wind was 

 favorable. With the thermocouple bent and hung eight feet over the 

 edge of the hole, the temperature was 309 C. 



Photograph by Jasper D. Sayre 

 A MUD POT IN AREA 48. 



Boiling mud may be seen spattering up from the bottom, 

 left and right, 



No. 48. T. 100 C. Mud Volcanoes, second area. Mt. Cerberus, 



S48E. Baked Mountain, S 84 E. 86, S 3 W. X, N 63 W. 

 This was a nest of mud pots, boiling and sometimes spouting three 

 feet into the air. A crater ring of considerable size had been formed 

 around some of them. The mud was a chocolate brown, and no con- 

 spicuous deposits or incrustations were noticed. All had a temperature 

 of 100 C. Photograph 3693 (See cut above). 



