Pnhlications of the United States Government. 75 



Topographic map of the United States. {Continued.) 



3. Physical geography of the Texas region, by Robert T. Hill. 

 1900. Folio. Twelve pages of text (including 11 cuts) ; 5 sheets 

 of special half-tone illustrations ; 5 topographic sheets, one showing 

 types of mountains, three showing types of plains and scarps, and 

 one showing types of rivers and canyons ; and a new map of Texas 

 and parts of adjoining territories. 



Geologic atlas of the United States. 



The Geologic Atlas of the United States is the final form of pub- 

 lication of the topographic and geologic maps. The atlas is issued 

 in parts. Under the plan adopted the entire area of the country is 

 divided into small rectangular districts (designated quadrangles), 

 bounded by certain meridians and parallels. Each folio contains 

 topographic, geologic, economic, and structural maps, together with 

 textual descriptions and explanations, and is designated by the name 

 of a principal town or of a prominent natural feature within the 

 district. 



SMITHSONIAN INSTITUTE. 



Illustration of surface geology ; by Edward Hitchcock. Smith- 

 sonian Institute Contributions, vol. 9, 1857, 155 pp., 12 pi. 

 Separate as No. 90. 



The author, under erosions of the earth's surface, cites that of 

 the west side of the Sierra Nevada Mountains in California, pp. 

 107-108. There is a second edition of this work published at Am- 

 herst, 1860. 



Geological progress for 1882; by T. Sterry Hunt. Smith- 

 sonian Eeport for 1882, pp. 325-345. Washington, 1883. 



The collection of building and ornamental stones in the United 

 States National Museum; by George P. Merrill. Smith- 

 sonian Report for 1886, Part II, pp. 277-648, pL 1-9. 



UNITED STATES NATIONAL IVIUSEUM. 



Post Pliocene fossils in the Coast Range of California ; by W. 

 H. Dall. Proc. U. S. Natl. Mus., vol. 1, 1878, p. 3. 



Specimens of Donax Californicus, Chione succincta, Olivella hi- 

 pUcata, and Certhidea sacrata in a semi-fossilized condition from 

 San Luis Rey, Cal. 



