CONTENTS. v 
Lode mining in southeastern Alaska — Continued. Page. 
Ore deposits — Continued. 
Silver, lead, and zinc 53 
Wrangell district 53 
Ketchikan district 53 
NONMETALLIC DEPOSITS OF SOUTHEASTERN ALASKA, by C. W. Wright 55 
Introduction 55 
Marble 55 
Prince of Wales Island 56 
Revillagigedo Island 57 
Ham Island 57 
Limestone 57 
Granite 57 
Gypsum 58 
Coal 59 
Mineral springs 60 
Thermal springs 60 
The Yakutat Bay region, by R. S. Tarr 61 
Geography 61 
Stratigraphy 61 
Crystalline rocks 62 
Yakutat series 62 
Coal-bearing beds 62 
Unconsolidated deposits 63 
Economic geology 63 
^ Petroleum 63 
Coal 64 
Platinum 64 
Gold 64 
Distribution and character of the Bering River coal, by G. C. Martin 65 
Introduction 65 
Extent of the field 65 
Geologic sections 65 
Structural features 68 
Coal seams 68 
Anthracite 68 
Semianthracite or semibituminous 70 
Character of the coal 73 
Physical properties 73 
Chemical and calorimetric tests 73 
Coking tests 75 
Conditions for mining 75 
Transportation and markets 76 
Copper and other mineral resources of Prince William Sound, by U. S. Grant . 78 
Introduction 78 
General geology - 79 
Mineral resources 80 
Copper deposits - 80 
Copper mines 81 
Copper prospects - 82 
Solomon Gulch - - - 82 
Galena Bay 83 
Boulder Bay - 83 
Landlocked Bay 83 
