274 The Ohio Journal of Science [Vol. XIX, No. 5, 



No. 35. T. 245 C. Ill, N 20 E. X, S 60 E. XXX, S 20 W. 

 This steamer was on the bank of the River Lethe, and was similar 

 to No. 34 in appearance, except that the temperature was higher. 

 The mouth of the fumarole was about 12 to 14 inches in diameter and 

 surrounded by hard baked mud, without deposits. Surface temperature 

 245 C. 



No. 36. T. 245 C. IX, N 22 W. Mt. Mageik, S 26 W. X, S 51 W. 

 This fumarole was on the east bank of the canyon formed by the 

 stream flowing out of the Knife Peak Valley, and marked the upper 

 end of the impassable mud canyon which this stream forms. The 

 main vents were surrounded by quite an area of steaming ground. 

 The deposits were red and yellow, around the larger and hotter vents. 

 Temperatures of 245 C., 171 C., 181 C. were recorded. Photograph 

 4552. 



Photograph by Robert F. Griggs 

 FUMAROLE 32 FROM A DISTANCE. 



The man silhouetted against the steam near the vent gives the scale. Although 

 the outlying cracks accessible to our thermocouple registered only 323 C., 

 this place has every appearance of being hotter than No. 33, where the highest 

 temperature measured in the Valley was found. 



No. 37. T. 342 C. 100 yards east of No. 36. 



This fissure was nearly overlooked, as it appeared no hotter than 

 No. 36. However our inquisitiveness was rewarded in discovering 

 that it had a surface temperature of 342 C. The mud here had a 

 crack 100 yards long and the temperatures at various places along this 

 crack were 284 C., 294 C., 314 C. and 342 C. The deposits were 

 yellow and brown near the mouth of the vents while a few feet away from 

 the line of the fissure the ground was ordinary gray ash. 



No. 38. T. 100 C. IX, N 39 W. X, S 82 W. XI, S 3 W. 



This mass of steam from a distance suggested a temperature of 

 300 C. at least, but although we tried every crack and crevice in an 

 area of an acre or more, at no place did we succeed in securing a tem- 

 perature above 100 C. The ground here was covered with a grayish, 

 bluish-black mud about eight inches deep that remained nearly 100 C. 

 in temperature and very disagreeable to work ankle deep in. This 

 marked the northern limit of these mud blanketed areas. Photographs 

 3753, 3755, 4148, 4150. 



