Life of Lower Lake Region. 115 



sculpture that this fine stone head exhibits its 

 true rank. It is the added story one reads in 

 its geological environment, for it is primarily 

 a piece of the Blue mountains of Eastern Ore- 

 gon, and as such its rock material represents 

 the fine sediment of a deep lake into which it 

 was washed by a flooded mountain stream. 

 Not a tooth of the forty-four this head con- 

 tains, but has a measurable nerve cavity filled 

 with some form of quartz which could only 

 penetrate that cavity in a liquid state. And 

 this liquid condition of quartz could only have 

 occurred under great heat and pressure, two 

 of the agencies by which the whole mass was 

 changed into rock. Think these thoughts, 

 then look again into that mute face! 



The head figured on Plate IX is in some 

 of its features in broad contrast with the one 

 just described. It belonged to an animal 

 about the same size, but of broader, almost 

 triangular crown, yet in the number and posi- 

 tion of its teeth completely conforming to the 

 Oreodon type. 



