March, 1919] Temperatures of Ten Thousand Smokes 275 



No. 39. T. 122 C. X, S 65 W. Mt. Mageik, S 20 E. 



A single isolated fumarole caught our attention and, as it seemed 

 so far away from the Valley proper and so close under Knife Peak, 

 we thought that the extra time required to go to it would be rewarded 

 with a high temperature. We certainly were disappointed, however, 

 when the finger of the pyrometer stopped at 122 C. Soft wind-blown 

 ash and pumice surrounded this fumarole. The throat was brownish 

 in color and not very hard in texture. Photographs 3757, 3758. 



No. 40. T. 191 C. X, S 38 W. Mt. Cerberus, S 37 E. 



This was the first vent on a line of steamers and gassers that lay 

 south of Station IX, near the edge of the mud flow. The ridge that 

 marks the fissure line is broken in many places by the formation of 

 eruptive craters. Several crevices showed only 100 C., but two were 

 hotter, being 191 C. and 112 C. The throats of these two were red, 

 but not otherwise conspicuously colored. 



No. 41. T. 254 C. 500 yards south of No. 40. ' 



We were drawn to this region by the copious steaming of No. 40, but, 

 failing to find a high temperature in its steam, were about to pass on 

 when the steam from No. 41 caught our eye. It did not condense for 

 three or four feet from the mouth of the vent, so we knew it must be 

 hot. There were brown and white deposits in and around the throat 

 of the fumarole. The temperature recorded was 254 C. at the mouth 

 of the vent. Photograph 4150. 



No. 42- T. 221 C. X, S 26 W. Mt. Mageik, S 26 E. Needle Peak, 



N75W. 



This line of craters was close to No. 41. In No. 42 three craters lay 

 in a line, about 20 feet apart, but only the middle one was accessible, as 

 the others were too deep and funnel shaped. This one registered 

 221 C. and had a dark red and orange throat about one foot in diameter. 

 The crater, which was about three feet deep, had a rim of about 50 feet 

 in circumference. The throat was in one side of the bottom of the 

 crater. 



No. 43. T. 100 C. Mt. Mageik, S 28 E. X, S 29 W. 



Although registering only 100 C., this fumarole, at the vanishing 

 point of a small creek, was located because of its corispicuousness. The 

 steam rushed forth with great pressure and roared from many cracks 

 in the vicinity, indicating perhaps a higher temperature below the 

 surface. No deposits were noticed, probably being covered up by the 

 shifting ash and sand. 



No. 44- T. 100 C. Mud Volcanoes, first area. IX, N 13 W. Mt. 



Mageik, S 31 E. X, S 23 W. 



From a distance this appeared as a gentle area of steamers. It was 

 not until we had approached the center of the area, waist deep in steam, 

 blown close to the ground by the wind, that we realized it was different. 



