INDEX. 
231 
Page. 
Iron Creek, basin of, sketch map of 158 
freight rates to 158, 161 
geology and mineral resources of, paper 
on 157-103 
stream measurements on 185 
Iron Creek, Left Fork of, mining near 1G2 
Irving Mining Company, ditch of 170 
I X L Gulch, mining on 148 
Iyoukeen Cove, gypsum, at 79 
Jack Wade Creek, placer mining on 38 
Jett Creek, stream measurements on 185 
Jualin mine, operations at 57-58 
Julia claim, work on 62 
Jumbo copper mines, operations at.. 70-71 
Juneau, gold deposits near 50 
Juneau district, gold mining in 52-59 
Juneau gold belt, extent of 49 
Jurassic rocks, coal beds in 42 
occurrence and character of. . 107 
Kahiltna River, mining on 118-119, 
Kantishna region, access to 213, 220-221 
coal in 214 
description of 213 
geology of 206-207, 21 4, 219-220 
map (PI. IV) showing.. 206 
placers of 213-221 
production of 205 
Karta Bay, copper mining at 68 
Kasaan Peninsula, copper deposits and min- 
ing on 66-68 
Kashwitna River, copper on 124 
Katalla formation, oil seepages in 93 
Katalla slough, gas on 95 
oil seepages and wells on 92-94,97 
Kaviruk River, transshipping point on. . . 170-171 
Kenai rocks, occurrence and character of. . 107-108 
Ketchikan, gold mining near 50 
Ketchikan district, copper mining in 66-72 
gold mining in 61-63 
Kiam copper mine, ore bodies at 69 
Kigluaik series, graphite in 139 
occurrence and character of 128, 166 
Kindle, E. M., work of 16 
Kings Creek, coal on 109,111,114 
Kinzie, R. A., cited on Tread well gold 
mines 52 
Klag Bay, gold mining on 61 
Kletsan Creek, native copper on. 28 
Knik Arm, geology on 106-107 
Knik River, copper on 124 
mining on 118 
surveys along 15 
Knopf, Adolph, work of 15 
Knopf, Adolph, and Paige, Sidney, paper 
by, on reconnaissance in Mata- 
nuska and Talkeetna basins. . 104-126 
Kodiak Island, gold production of 34 
Kootznahoo Inlet, coal at 80 
Kougarok Mining and Ditch Company, 
ditches of 170 
Kougarok region, accessibility of 170-171 
auriferous gravels in 172-181 
Page. 
Kougarok region, ditches in, cost of 171 
freight rates to no 
geology of L66 169,172-173,175,180 
gold production of, 1900-1905 171 
m ining in 169-172 
paper on 1 
sketch map of Ll :• 
topography of L64-166 
Kougarok River, description of 176 
ditches near 169-170 
mining on 171,177-178 
Kougarok River, North Fork of, mining on 
or near 177,178 
Koyukuk district, placer mining and pro- 
duction in 38 
Kruzgamepa River, stream measurements 
on 184, 185 
Kuiu Island, geology of 48 
Kupreanof Island, coal on 80 
geology of 48 
mineral zone in 50 
Kuzitrin River, basin of, gold placers in. . 172-175 
description of 165 
Kuzitrin series, occurrence and character 
of 128-129 
Lake Creek, mining on 119 
Lake View copper mines, ore bodies at 69 
Lakeside Claim, work on 62 
Lane, T. T., ditch-building by 169, 170 
Last Chance Creek, antimony on 219 
gold and silver on 219 
Lavas, occurrence and character of 108 
Lead ore, occurrence of 72, 156, 190, 203 
Lignite, analyses of 45 
deposits of 109, 115, 221-226 
distribution of, map (PI. II) showing.. 40 
Lignite Creek, coal on 225-226 
sections on 225-226 
Limestone Inlet, gold-bearing veins at 58 
marble at 77 
Little Creek, gold on 142 
mining on 141 
Little Sushitna River, coal on 109 
Lituya Bay, gold mining at 64-65 
Lode deposits, relative value of placers 
and 126-127 
Lode mining, Niukluk River basin 155 
southeastern A laska, paper on 47-72 
statistics of 26-27 
work in 26-30 
Lodes, auriferous, occurrence of 156 
Lost Chicken Creek, placer mining on 38 
Lost River, tin prospects at 28, 29 
Love, J. M., acknowledgments to 157 
Lulu Creek, mining on 163 
Ljmx Creek, copper on 124-125 
mining on 123-124 
M. 
McDowell, C. B., quoted on dredging in the 
Fortymile region 
McGinnis Creek, gold mining on 
Macklin Creek, mining on or near 177, 179 
Mamie copper mine, operations at ( >< 
