CONTENTS. 
Economic developments ix southeastern Alaska, by F. E. and C. W. 
Wright 
Introduction 
Geology 
Structure 
Distribution of rocks 
Mineralization 
Ore deposits. 
Placer deposits 
Mines and developments 
Skagway mining district 
Juneau mining district 
Treadwell group 
Mines south of Juneau 
Mines north of Juneau 
Mines on Admiralty Island 
Funter Bay 
Young Bay 
Coal 
Sitka mining district 
Cache mine 
Bauer mine 
Lucky Chance mine 
Billy basin 
Rodman Bay 
Freshwater Bay 
Wrangell mining district 
Duncan Canal 
Glacier basin 
Bradfield Canal 
Ketchikan mining district 
Copper 
Niblack Anchorage 
Kasaan Peninsula 
Hetta Inlet 
Alaska Copper Company 
Alaska Industrial Company 
Gold 
Dolomi 
Hollis 
Gravina Island 
Dall Island 
Revillagigedo Island 
Other prospects 
Marble 
The Treadavell ore deposits, Douglas Island, by Arthur C. Spencer 
Introduction 
Geology of the region 
The ore bodies 
General features 
Greenstone 4 
Black slate 
Albite-diorite 
Basalt dikes 
Page. 
