ADVERTISEMENT. VII 
Peters, W. J. Tanana and White rivers, portions of; scale, 1:625000. Contained 
in "A reconnaissance in the Tanana and White River basins, Alaska, in 
1898." Twentieth Ann. Kept,, pt. 7, 1900, pp. 425-494. 
Lynn canal, routes from, via headwaters of White and Tanana rivers to 
Eagle City; scale, 1:625000. Contained in "A reconnaissance from Pyra- 
mid Harbor to Eagle Citv, Alaska." Twenty-firsl Ann. Kept., pt. 2, L900, 
pp. 331-391. 
Norton Bay region; scale, 1 : 625000. Contained in "Reconnaissances of 
Cape Nome and Norton Bay regions, Alaska," 1900. 
Koyukuk River to month of Colville River, including John River; scale, 
1: 625000. Included in Professional Paper No. 20. 
Post, W. S. Cook Inlet, region from head of, to Kuskokwim River and down the 
Kuskokwim to Bering Sea, Bristol Bay, and a part of Alaska Peninsula; 
scale, 1:625000. Published in sections in "A reconnaissance in South- 
western Alaska, in 1898." Twentieth Ann. Rept, pt. 7, 1900, pp. 31-264. 
Reaburn, D. L. The Mount McKinley region; scale, 1:250000. Contained in Pro- 
fessional Paper No. — . 
Witherspoon, D. C. Copper, Nabesna, and Chisana rivers, headwaters of; scale, 
1 : 250000. Contained in " The geology of the central Copper River region. ' ' 
Professional Paper No. 41. 
Seward Peninsula, northeastern portion of, topographic reconnaissance of; 
scale, 1:250000. Contained in "The Fairhaven gold placers, Seward 
Peninsula." Bull. No. 247. 
TOPOGRAPHIC MAPS OF ALASKA IN PREPARATION. 
Witherspoon, D. C. The Fairbanks placer district; scale, 1 : 250000. 
Gerdine, T. G. The Nome district; scale, 1 : 62500. 
Hamilton, E. G. The Cook Inlet placer fields; scale, 1 : 250000. 
