PUBLICATIONS OF THE UNITED STATES GEOLOGICAL SURVEY. 
Following are complete lists, to date, of the serial publications of 
the United States Geological Survey, which consist of (1) Annual 
Reports, (2) Monographs, (3) Professional Papers, (4) Bulletins, (5) 
Mineral Resources, (6) Water-Supply and Irrigation Papers, (7) Topo- 
graphic Atlas of United States — folios and separate sheets thereof, (8) 
Geologic Atlas of United States — folios thereof. 
The Bulletins, Professional Papers, 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; I), Petrography and mineralogy; E, Chemistry and physics; 
F, Geography; G, Miscellaneous; H, Forestry; I, Irrigation; J, Water 
storage; K, Pumping water; L, Quality of water; M, General hydro- 
graphic investigations; N, Water power; O, Underground waters; 
P, Hydrographic progress reports. A table showing the papers of 
each series is given on pages 148 and 141*. 
The classes numbered 2, 7, and 8 are sold at cost of publication; the 
others are distributed free. It is impossible to comply with gen- 
eral demands for the publications which are distributed free, such as 
to have all of any series sent, but requests for a certain paper are 
granted whenever practicable. No person will be given more than one 
copy of any publication. Mairy of the publications of the Survey are 
out of print, but these can usually be obtained from dealers in second- 
hand books in any large city. 
For publications to which prices are affixed prepayment is required, 
and should be made in cash (exact amount) or by postal or express 
money order payable to the Director of the United States Geological 
Survey. Checks, stamps, or foreign coin can not be accepted. Full 
address, including county, should be given. Address all communica- 
tions to The Director, U. S. Geological Survey, Washington, D. C. 
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