Proceedings Am Philos. Soc. Vol. LII. No. 211 



Plate XXIX 



MT. HUASCARAN, IN CENTRAL PERU, ALTITUDE ABOUT 24,000 FEET. 



Photograph and copyright by Miss Anna S. Peck, National Geographical Magazine, for 



June, 1909. Used by special permission of Miss Peck. 



^^ %!>. 



MT. ACONCAGUA, IN CENTRAL CHILE. 

 The highest Volcano in the world, and long considered the summit of the Andes. 



Altitude, 22,800 feet. 



