34 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Brooks, Alfred H. — Continued. 
313. The geology and geography of Alaska. A summary of existing knowl- 
edge.— U. S. Geol. Survey, Prof. Paper, no. 45, 327 pp., 34 pis., 6 figs., 1906. 
Abstract : Science, new ser., vol. 25, pp. 946-947, June 14, 1907. 
Describes the physiographic features, the general geologic structure and stratigraphy, 
the geologic history, and the geomorphology. 
314. Report on progress of investigations of mineral resources of Alaska 
in 1905. Administrative report.— U. S. Geol. Survey, Bull. no. 284, pp. 1-3, 1906. 
315. The mining industry [in Alaska] in 1905.— U. S. Geol. Survey, Bull, 
no. 284, pp. 4-9, 1 pi., 1906. 
Contains notes on the occurrence of mineral resources. 
316. Report on progress of investigations of mineral resources of Alaska in 
1906. Administrative report.— U. S. Geol. Survey, Bull. no. 314, pp. 11-18, 1907. 
Gives an outline of geologic work in Alaska in 1906 and a list of publications by the 
U. S. Geological Survey on Alaska issued in 1906. 
317. The mining industry [in Alaska] in 1906.— U. S. Geol. Survey, Bull, 
no. 314, pp. 19-39, 1 pi., 1907. 
318. The Kougarok region [Alaska]. — U. S. Geol. Survey, Bull. no. 314, 
pp. 164-181, 1 fig., P. 107. 
Describes the general geology and the distribution of auriferous gravels. 
319. The Circle precinct [Alaska].— U. S. Geol. Survey, Bull. no. 314, pp. 
187-204, 1907. 
Describes the general geologic features, the distribution of gold-bearing gravels, and 
an occurrence of coal. 
320. Geologic reconnaissance map of Alaska. — Abstract : Geol. Soc. America, 
Bull., vol. 17, pp. 695-700, 1907. 
Gives an outline of the stratigraphy and geologic structure. 
Production of gold and silver in 1905 in Alaska. — See no. 2418. 
The production in Alaska in 1906 of gold and silver. — See no. 2419. 
Brooks, Alfred H., and Kindle, E. M. 
321. The Paleozoic section of the upper Yukon. — Abstract : Science, new 
ser., vol. 25, pp. 181-182, February 1, 1907. 
Brooks, Alfred II. , and others. 
Report on progress of investigations of mineral resources of Alaska in 1905. — 
U. S. Geol. Survey, Bull. no. 284, 169 pp., 14 pis., 10 figs., 1906. 
The papers in this report have been listed under the individual authors. 
Report on progress of investigations of mineral resources in Alaska in 1906. — 
U. S. Geol. Survey, Bull. no. 314, 235 pp., 4 pis., 9 figs., 1907. 
The papers in this report have been listed under the individual authors. 
Brown, Barnum. 
322. The osteology of Ghampsosaurus Cope. — Am. Mus. Nat. Hist., Mem., 
vol. 9, pt. 1, pp. 1-26. 5 pis., December, 1905. 
323. New notes on the osteology of Triceratops. — Am. Mus. Nat. Hist., Bull., 
vol. 22, pp. 297-300, 1 pi., 2 figs., 1906. 
324. Gastroliths.— Science, new ser., vol. 25, p 392, March S, 1907. 
Discusses the occurrence of pebbles which have been entitled " gastroliths." 
325. The Hell Creek beds of the upper Cretaceous of Montana : their rela- 
tion to contiguous deposits, with faunal and floral lists, and a discussion of their 
correlation.— Am. Mus. Nat. Hist., Bull., vol. 23, pp. 823-845, 8 figs., 1907. 
Brown, Calvin S. 
326. Lignite of Mississippi. — Mississippi State Geol. Survey, Bull. no. 3, 
71 pp., 1907. 
