CLASSIFICATION OF THE PUBLICATIONS OF THE UNITED STATES GEOLOGICAL 
SURVEY. 
[Bulletin No. 308 J 
The publications of the United States Geological Survey consist of (1) Annual Reports, 
(2) Monographs, (3) Professional Papers, (4) Bulletins, (5) Mineral Resources, (6) Water- 
Supply and Irrigation Papers, (7) Topographic Atlas of United States — folios and separate 
sheets thereof, (8) Geologic Atlas of United States — folios thereof. The classes num- 
bered 2, 7, and 8 are sold at cost of publication; the others are distributed free. A circular 
giving complete lists can be had on application. 
Most of the above publications can be obtained or consulted in the following ways : 
1. A limited number are delivered to the Director of the Survey, >om whom they can be 
obtained, free of charge (except classes 2, 7, and 8), on application. 
2. A certain number are delivered to Senators and Representatives in Congress for 
distribution. 
3. Other copies are deposited with the Superintendent of Documents, Washington, D. C, 
from whom they can be had at prices slightly above cost. 
4. Copies of all Government publications are furnished to the principal public libraries 
in the large cities throughout the United States, where they can be consulted by those 
interested. 
The Professional Papers, Bulletins, and Water-Supply Papers treat of a variety of subjects, 
and the total number issued is large. They have therefore been classified into the following 
series: A, Economic geology; B, Descriptive geology; C, Systematic geology and paleon- 
tology; D, Petrography and mineralogy; E, Chemistry and physics; F, Geography; G, Mis- 
cellaneous; H, Forestry; I, Irrigation; J, Water storage ; K, Pumping water; L, Quality of 
water; M, General hydrographic investigations; N, Water power; O, Underground waters: 
P, Hydrographic progress reports. This paper is the ninetieth in Series A, and the one 
hundred and eleventh in Series B, the complete lists of which follow (PP= Professional 
Paper; B=Bulletin; WS= Water-Supply Paper): 
SERIES A, ECONOMIC GEOLOGY. 
B 21. Lignites of Great Sioux Reservation: Report on region between Grand and Moreau rivers, 
Dakota, by Bailey Willis. 1885. 16 pp., 5 pis. (Out of stock.) 
B 46. Nature and origin of deposits of phosphate of lime, by R. A. F. Penrose, jr., with introduction by 
N.S.Shaler. 1888. 143 pp. (Out of stock.) 
B 65. Stratigraphy of the bituminous coal field of Pennsylvania, Ohio, and West Virginia, by I. G. 
White. 1891. 212 pp., 11 pis. (Out of stock.) 
B 111. Geology of Big Stone Gap coal field of Virginia and Kentucky, by M. R. Campbell. 1893. 106 pp., 
6 pis. (Out of stock.) 
B 132. The disseminated lead ores of southeastern Missouri, by Arthur Winslow. 1896. 31pp. (Out 
of stock.) 
B 138. Artesian-well prospects in Atlantic Coastal Plain region, by N. H. Darton. 1896. 228 pp., 19 pis. 
B 139. Geology of Castle Mountain mining district, Montana, by W. IE Weed and L. V. Pirsson. 1896. 
164 pp., 17 pis. 
B 143. Bibliography of clays and the ceramic arts, by J. C. Branner. 1896. 114 pp. 
B 164. Reconnaissance on the Rio Grande coal fields of Texas, by T. W. Vaughan, including a report 
on igneous rocks from the San Carlos coal field, by E.C. E. Lord. 1900. 100 pp., 11 pis. (Or 
of stock.) 
B 178. El Paso tin deposits, by W. H. Weed. 1901. 15 pp., 1 pi. 
B 180. .Occurrence and distribution of corundum in United States, by J. H. Pratt. 1901. 98 pp., 14 pis. 
(Out of stock; see No. 269.) 
B 182. A report on the economic geology of the Silverton quadrangle, Colorado, by F. L. R 
1901. 266 pp., 16 pis. (Out of stock.) 
