SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE SHERZF.R. 

 Mt. Donkin iintl Asulkan Pass. 



PLATE XXXIX. 

 Pollux. Castor. 



FIG. i. General view of Asulkan Glacier in 1902. Copyrighted, 1902, by the Detroit ['holographic Co. 

 Donkin. Castor and Pollux. Dome. Bonney. 



FIG. 2. The Asulkan glaciers and snowfields from Avalanche Mt. (elevation 9,387 



feet), showing a decadent piedmont glacier. Photographed in 



1901 by Arthur O. Wheeler. 



