CONTENTS. 
Page. 
Letter of transmittal 7 
Introduction 9 
Origin and development of the Survey 9 
Present organization of the Survey . . 12 
General results achieved by the Survey 14 
Administrative branch 16 
Executive division 16 
Section"of correspondence, records, supplies, and shipments 16 
Section of instruments 18 
Messenger, watch, and labor force 19 
Division of disbursements and acc< units 19 
Library 21 
Geologic branch 24 
Division of geology and paleontology 24 
Division of Alaskan mineral resources 31 
History of investigations 31 
Geography of Alaska 33 
General features. . . 33 
The mountains 34 
The rivers 36 
Coast line and islands 38 
Climate, vegetation, and resources 39 
Operations of the Alaskan division 39 
Eesults 43 
Division of mining and mineral resources 48 
Division of chemical and physical researches 50 
Section of chemistry 50 
Section of physics 53 
Topographic branch 55 
Division of topography ' 55 
Eastern and western sections 55 
Section of triangulation and computing 64 
Triangulation 65 
Base measurement 65 
Primary traverse 66 
Spirit leveling 66 
Office work 69 
Section of inspection of surveying and mapping 70 
Division of geography and forestry . . 71 
Hydrographic branch 74 
Division of hydrography 75 
Division of hydrology 84 
Eastern and western sections 84 
Division of hydro-economics 88 
Reclamation service 91 
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