Vol. IV, pp. 117-162, PLS. 18-20 May 15, 1892 



THE 

 NATIONAL GEOGRAPHIC MAGAZINE 



AN EXPEDITION THROUGH THE YUKON DISTRICT. 

 BY CHAELES WILLARD HAYES. 



{Presented before the Society February 5, 1892.) 



CONTEXTS. 



Page. 



Introduction 118 



Narrative of the Expedition 120 



Topograph}^ 127 



Cartographic Data 127 



Orographic Features 128 



Drainage 131 



Vegetation 136 



Hard Geology 137 



Character of the Observations 137 



Rocks of Taku Valley 138 



Rocks of the interior Plateau 138 



Rocks of Scolai Pass 140 



Rocks of Copper River Valley 141 



Rocks of Prince William Sound 142 



Mineral Resources 142 



Gold 142 



Copper 143 



Volcanic Phenomena 145 



Active Volcanoes 145 



Recent volcanic Activity 146 



Tertiary volcanic Activity 150 



Glacial Phenomena 150 



Existing Glaciers 150 



Former Glaciation 155 



Appendix — Cryptogams collected by Dr C. Willard Ha3'es in Alaska, 

 1891 ; by Clara E. Cummings 160 



17— Nat. Geog. Mag., vot,. IV, 1802. (117j 



