OUR GREATEST NATIONAL MONUMENT 



(IV. V. 



Photograph by E. G. Zies 

 UKAK CAMP 

 The refuge to which we fled during the storm at Baked Mountain (see text, page 279). 



I * / 



1 



Photograph by W. L. Henning 



EROSION IN VOLCANIC ASH 



We cut off the top of this tree in 1917 at a then convenient height above the ground. 

 So much ash has washed out in the ensuing years that the cut end now stands nine feet above 

 the ground. 



