OUR GREATEST NATIONAL MONUMENT 



A BONFIRE KINDEED BY WATER (SEE PAGE 250) 



One of the fumaroles was so hot and dry that shavings burst into flame after being 

 plunged for a moment into its hot vapor. Since this consisted of almost pure steam — that 

 is to say, water — what we really did was to kindle a fire by poking a stick into the water. 

 Temperature measurements by the geophysicists showed that it was 645 C. (nearly 1200 F.). 



7 



Photographs by R. F. Griggs 



FUMAROLES AT THE CORNER OF BAKED MOUNTAIN 



We all wanted to come down at night and see if the throat of the fumarole shown in the 

 upper illustration was red hot, but no one cared to try to find his way around in the dark. 



