INDEX. 
A. Page. 
Alaska, map of 9 
Alders, occurrence of 12 
Amber, occurrence of 33 
American Creek, gold on 53-54 
hydraulic plant on, description of 54 
view of 54 
location of 20 
origin and course of 53-54 
rocks on SI, 54, 58 
trail to 11 
view on 56 
Aqueduct, improvised, view of 56 
Archean rocks, character of 25 
Area of region discussed 9 
Aspen, occurrence of 12 
Assay, results of 41, 45, 48 
B. 
Barite, occurrence of 
Barnard, E. C, mapping by • 
work of 
Barney Creek, location of 
origin, course, and character of 
rocks on 
Basalt, character and occurrence of 
Bed rock, depth to ... . 45, 47, 48, 50, 60-65, 75, 
gold in 43,45,47,60,62, 
Benches, gold on 
gravels in 
view of 
Betula prisca, occurrence of. 
Birch, occurrence of 12, 
Birch Creek, origin, course, and character 
of 15-16, 
Birch Creek, North Fork of, origin and char- 
acter of 
Birch Creek, South Fork of, course and char- 
acter of 
schists on, view of 
Birch Creek drainage system, location and 
character of 
Birch Creek region, character of 21-22, 
drainage of 17, 21-22, 
economic development of 
geology of 
gold placers of 9, 28, 
investigation in % 
location of 11, 
map of 
mining developments in 
population and production on 
rocks of 27-29, 37, 
topography of 17, 
trail to 
41,54 
18 
13 
20 
56 
33 
37,47 
77-78 
75,77 
42 
57 
20 
21-22 
21-22 
22 
28 
21-22 
59-66 
59-66 
11 
23-38 
59-66 
13,14 
21-22 
60 
59-66 
66 
59-66 
21-22 
11,16 
Pag< 
Birch Creek schists, character of 25,27 29 37 
occurrence of 25-29, 83 
Boat, freighting by ]0 
Boulder Creek, origin and course of 59 
Broken Neck Creek, character of 54 
gold on 54 55 
location and production of 54-55 
Brooks, Alfred H., letter of transmittal by.. 7-8 
on Birch Creek formation 30 
on Fortymile formation 30 
on Kotlo scries 30 
on Pel 1 y gneiss 27 
on Tanana Valley 66 
stratigraphic table by 24 
work of i.;. n,, 
Bryant Creek, fossils on 38 
location of 19 
rocks on and near 31-33 
Buckskin Creek, rocks on :;i t 
Burlingame & Co., assay by 41,45,48 
C. 
Calcite, occurrence of 49 
Canyon Creek, location of 19 
tributaries of, gold on 39, 44 
Cassiterite, occurrence of 78 
Cattle, importation of 69 
Central House, hay at 12-13 
location of 11 
Charley River, crossing of 15-16,2] 
location, character, and navigation of. . 21 
rocks on and near 32, 36 
Chatanika River, origin, course, and char- 
acter of 22 
Chatham Creek, character of 72,78 
gold on 67. 78 80 
location and course of 72 
source of 67 
Chena, location and character of 11-12 
Chena River, course and character of 22 
navigation on 12 
settlement on 67 
Chena Slough, location of 12, 23 
navigation on 12 
Cherry Creek, prospecting near 13 II 
ChickenCreek, character and location of. 19, 46-51 
fossils on 38 
gold on 35, 39, 15-51, 58 
gold in place on 58 
machinery on, view of 48 
origin and e< lurse of 46-51 
population and product ion on 51 
rocks on and near 32, 34, 36, :'.7. 1 * ■ 
sett lenient on 40 
85 
