VI ADVERTISEMENT. 
Moffit, F. H. The Fairhaven gold placers, Seward Peninsula, Alaska. Bull. No. 247, 
1905, pp. 1-85. 
Prindle, L. M. The gold placers of the Fortymile, Birch Creek, and Fairbanks 
regions. Bull. No. 251, 1905, pp. 1-89. 
Purington, C. W. Methods and cost of gravel and placer mining in Alaska. Bull. 
No. 263, 1905, pp. 1-273. 
PAPERS ON ALASKA IN PREPARATION. 
Brooks, A. H. An exploration in the Mount McKinley region. 
Collier, Arthur J. Placer mines of Seward Peninsula. 
Coal field of Cape Lisburne. 
Martin, G. C. The geology of Alaska Peninsula. 
Moffit, F. H. The Cook Inlet gold placers. 
Prindle, L. M., and Hess,"F. L. The gold placers of the Rampart region. 
Schrader, F. C. The geology of upper Copper and Tanana rivers. 
Stone, R. W. The Kachemak Bay coal fields. 
Spencer, Arthur C. The Juneau gold belt. 
Wright, C. W. The mineral resources of Admiralty Island. 
Wright, F. E. The mineral resources of the Wrangell district. 
The mineral resources of the Sitka district. 
TOPOGRAPHIC MAPS OF ALASKA. 
The following maps are on sale at 5 cents a copy, or $2 a hundred: 
Barnard, E. C. Fortymile quandrangle; scale, 1:250000. 
Peters, W. J. Juneau special quadrangle; scale, 1:63500. 
The following maps are included as illustrations of published reports, but have not 
been issued separately. They can be obtained only by securing the report: 
Barnard, E. C. Cape Nome and adjacent gold fields; scale, 1 : 250000. Contained in 
a special publication of the U. S. Geol. Survey, entitled "Reconnaissances 
in the Cape Nome and Norton Bay regions, Alaska, in 1900," Washington, 
Government Printing Office, 1901. 
Brooks, A. H. York and Kugruk regions, sketch maps of. Contained in "A 
reconnaissance in Cape Nome and Norton Bay regions, Alaska, 1900." 
Gerdine, T. G. Koyukuk and Chandlar rivers, portions of; scale, 1 : 625000. Con- 
tained in "Preliminary report of a reconnaissance along the Chandlar and 
Koyukuk rivers, Alaska, in 1899." Twenty-first Ann. Rept., pt. 2, 1900. 
Seward Peninsula, northwestern part of ; scale, 1 : 250000. Contained in Pro- 
fessional Paper No. 2. 
Fairbanks and Birch Creek districts, reconnaissance maps of; scale, 1 : 250000. 
Contained in "The gold placers of Fortymile, Birch Creek, and Fairbanks 
districts." Bulletin No. 251. 
Yukon-Tanana region, reconnaissance map of; scale, 1:625000. 
Copper and upper Chistochina rivers; scale, 1:250000. Contained in "A 
geology of the central Copper River basin." Professional Paper No. 41. 
and Witherspoon, D. C. Chitina and lower Copper River region; scale, 
1:250000. Contained in "The geology and mineral resources of a portion 
of the Copper River district, Alaska." Special Publication of the U. S. 
Geol. Survey, Washington, Government Printing Office, 1901. 
Goode, R. U. A topographic map of Alaska; scale, 1: 250000. Preliminary edition. 
Contained in Professional Paper No. — . 
Lowe, P. G., Mahlo, Emil, and Schrader, F. C. Copper River region; scale, 
1:376000. Contained in "A reconnaissance of a part of Prince William 
Sound and the Copper River district, Alaska, in 1898." Twentieth Ann. 
Rept,, pt, 7, 1900, pp. 341-423. (Out of stock.) 
Mahlo, Emil, and Schrader, F. C. Prince William Sound, sketch map of; scale 
1:376000. Contained in "The geology and mineral resources of a portion 
of the Copper River district, Alaska." (Out of stock.) 
Mendenhall, W. C. Cook Inlet, head of, to the Tanana via Matanuska and Delta 
rivers, also part of Kenai Peninsula; scale, 1:625000. Contained in "A 
reconnaissance from Resurrection Bav to Tanana River, Alaska, in 1898." 
Twentieth Ann. Rept., pt. 7, pp. 265-340. 
Muldrow, Robert. Sushitna River and adjacent territory; scale, 1:625000. Con- 
tained in "A reconnaissance in the Sushitna basin and adjacent territory, 
Alaska, in 1898." Twentieth Ann. Rept., pt. 7, 1900, pp. 1-29. 
