INDEX 
Page. 
Acknowledgments, list of 11 
Anway, C. H. , discovery of gold by 13 
Army post, establishment of 10 
Assays, from Porcupine district, table of... 20 
Bear creek, claims staked on .• 13 
course of 13 
difficulties on 13 
gold of 13 
rush to 13 
Black sand, occurrence and value of 20 
Boundary, international, change of 11, 12 
Bowlder Creek, claims staked on 12-13 
course of 12 
gold of 12-13 
rush to 12-13 
Brooks, A. H., cited on Alaskan rocks 15 
cited on Dirt Glacier fossil 16 
cited on Porcupine slates 17 
examination of gold placers by 9 
gold-bearing samples collected by 17 
report by 9 
Cahoon, C. P., acknowledgments to 11 
Cahoon Creek, mention of 26 
view on 26 
Calcite veins, occurrence and character 
of 18 
Carboniferous age, rocks of 16-17 
Chilkat Lake, origin of 15 
Chilkat Peninsula, character of 10 
examination of 10 
view of 9 
Chilkat River, drainage of 9 
elevations on 10, 14 
location of 9 
rocks along 10 
source, course, and character of 14 
trail by 10 
valley of 10 
Chisholm, Joe, location by 28 
Chisholm claim, description of 24 
view of 24 
Claims in Porcupine district, location of. . . 12 
in Porcupine district, map showing 21 
Claims on Porcupine Creek, location and 
development of 21-22 
Clear Creek, mouth of 13 
Climate, character of 31 
Commission, International Boundary, sur- 
vey by 9 
Copper, occurrence of 27 
Bull. 236—04 3 
Page. 
Cottonwood Creek, discovery of gold on . . . 13 
Cranston claim, description of 22-23 
section across 23 
view of 18 
Custer ledge, assay of ore from 28 
description of 27 
Dalton trail, route of 10, 30 
Dawson, G. M., cited on Alaskan geology.. 15 
Delta claim, description of 22 
Developments in Porcupine district, extent 
of 21-27, 28, 31 
on Nugget Creek, extent of 26-27 
on McKinley Creek, extent of 24-26 
on Porcupine Creek, extent of 22-24 
on Salmon River, projection of 27 
Dikes, greenstone, occurrence of 17 
Diorite, occurrence and character of 15-17 
Dirt Glacier, fossil from 16 
Discovery, claim No. 1 above, view of 22 
claim No. 1 above, Porcupine River at, 
view of 14 
Discovery claim, description of 23-24 
view of 20 
Drainage of Porcupine district, character of 14 
Elevations on Chilkat River, mention of. . . 10, 14 
Elevators, use of, in mining 29 
view of 20 
Erosion in Porcupine district, character of. 18-19 
Explorations in Porcupine district, account 
of 9, 12 
Field work in Porcupine district, by C. W. 
Wright, length of 9 
Finley, , exploration by 12 
Finley claim, description of 24 
section at 24 
view of 22 
Flumes, construction of. See under >-l<iim 
names, and under Developments. 
Forests, extent and character of 30 
Fossils, in Porcupine district 16-17 
on Dirt Glacier 16-17 
Fraser, Doctor, acknowledgments to 11 
Galena, occurrence of 22 
Geologic map of vicinity of Porcupine. See 
Map, geologic 16 
Geological Survey, exploration by 9 
Geology of Chilkat Peninsula, character of. 10 
of Porcupine district, account of 15-19 
Geology, economic, account of 19 
Girt y, G. H., fossils determined by 16 
33 
