brooks] ADMINISTRATIVE REPORT. 17 
Cape Lisbume coal field. — This area was critically examined by Mr. 
Collier, whose results are briefly outlined on another page. Mr. 
Collier not only mapped the geology of the coal field, but made a topo- 
graphic reconnaissance map of the same area. 
Yukon- Tanana region. — Mr. L. M. Prindle, aided by Mr. Frank L. 
Hess, continued the geologic reconnaissance of the region lying between 
the Yukon and Tanana regions, and their work completes the prelimi- 
nary mapping of about half this area. The economic work of this 
party included further studies of the Fairbanks placers and an exami- 
nation of the placers of the Rampart region. The results of the first 
are embodied in Mr. Prindle\s report on "The Gold Placers of the 
Fortymile, Birch Creek, and Fairbanks regions,"" now in course of 
publication. An article in this bulletin outlines the economic devel- 
opment in the Rampart region. A fuller report will be published 
later. 
The topographic work in this same region was extended by Mr. D. C. 
Witherspoon, who, assisted by Mr. G. T. Ford, mapped an area of 
about 4,000 square miles. There still remains reconnaissance work for 
about three parties in this district, besides the detailed surveys which 
will be demanded by the developments in the richer mining districts. 
a Cull. U. S. Geol. Survey No. 251. 
Bull. 259—05 2 
