PUBLICATIONS OF UNITED STATES GEOLOGICAL SURVEY. 
[Bulletin No. 227.] 
The serial publications of the United States Geological Survey consist of ( 1 ) Annual 
Keports, (2) Monographs, (3) Professional Papers, (4) Bulletins, (5) Mineral Re- 
sources, (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 numbered 2, 7, and 8 are sold at cost of publication; the 
others are distributed free. A circular giving complete lists may be had on appli- 
cation. 
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 paleontology; D, Petrography and mineralogy; E, Chemistry and phys- 
ics; F, Geography; G, Miscellaneous; H, Forestry; I, Irrigation; J, Water storage; 
K, Pumping water; L, Quality of water; M, General hydrographic investigations; 
N, Water power; 0, Underground waters; P, Hydrographic progress reports. This 
bulletin is the twenty-seventh in Series G, the complete list of which follows (all are 
bulletins thus far) : 
BULLETINS, SERIES G, MISCELLANEOUS. 
2. Gold and silver conversion tables, giving the coining values of troy ounces of fine metal, etc. 
computed by Albert Williams, jr. 1883. 8 pp. 
7. Mapoteca geologica Americana: A catalogue of geological maps of America (North and South), 
1752-1881, in geographic and chronologic order, bv Jules Marcou and John Belknap Marcou. 
1884. 184 pp. 
25. The present technical condition of the steel industry of the United States, by Phineas Barnes. 
1885. 85 pp. 
26. Copper smelting, by Henry M. Howe. 1885. 107 pp. 
44. Bibliography of North American geology for 1886, by Nelson Horatio Darton. 1887. 35 pp. 
75. Record of North American geology for 1887-1889, inclusive, by Nelson Horatio Darton. 1891. 
173 pp. 
91. Record of North American geology for 1890, by Nelson Horatio Darton. 1891. 88 pp. 
99. Record of North American geology for 1891, by Nelson Horatio Darton. 1892. 73 pp. 
100. Bibliography and index of the publications of the U. S. Geological Survey, 1879-1892, by Philip 
Creveling Warman. 1893. 495 pp. 
127. Catalogue and index of contributions to North American geology, 1732-1891, by Nelson Horatio 
Darton. 1896. 1,045 pp. 
130. Bibliography and index of North American geology, paleontology, petrology, and mineralogy 
for 1892 and 1893, by Fred Boughton Weeks. 1896. 210 pp. 
131. Report of progress of the division of hydrography for the calendar years 1893 and 1894, by 
Frederick Haynes Newell. 1895. 126 pp*. 
135. Bibliography and index of North American geology, paleontology, petrology, and mineralogy 
for the year 1894, by Fred Boughton W'eeks. 1896. 141 pp. 
140. Report of progress of the division of hydrography for the calendar year 1895, by Frederick 
Haynes Newell. 1896. 356 pp. 
146. Bibliography and index of North American geology, paleontology, petrologv, and mineralogy 
ior the year 1895, by Fred Boughton Weeks. 1896. 130 pp. 
149. Bibliography and index of North American geology, paleontology, petrology, and mineralogy 
for the year 1896, by Fred Boughton Weeks. 1897. 152 pp. 
156. Bibliography and index of North American geology, paleontology, petrologv, and mineralogy 
for the year 1897, by Fred Boughton Weeks. 1898. 130 pp. 
162. Bibliography and index of North American geology, paleontology, petrology, and mineralogy 
for the year 1898, by Fred Boughton Weeks. 1899. 163 pp. 
172. Bibliography and index of North American geology, paleontology, petrology, and mineralogy 
for the year 1899, by Fred Boughton Weeks. 1900. 141 pp. 
177. Catalogue and index of the publications of the United States Geological Survey, 1880-1901, by 
Philip Creveling Warman. 1901. 858 pp. 
188. Bibliography of North American geology, paleontology, petrology, and mineralogy for the 
years 1892-1900, inclusive, by Fred Boughton Weeks. 1902. 717 pp. 
189. Index to North American geology, paleontology, petrology, and mineralogy for the years 
1892-1900, inclusive, by Fred Boughton Weeks. 1902. 337 pp. 
203. Bibliography and index of North American geology, paleontology, petrology, and mineralogy 
for the year 1901, by Fred Boughton Weeks. 1902. ' 144 pp. 
215. Catalogue and index of the publications of the United States Geological Survey, 1901 to 1903, 
by Philip Creveling Warman. 1903. 234 pp. 
221. Bibliography and index of North American geology, paleontology, petrology, and mineralogy 
for the year 1902, by Fred Boughton Weeks. 1903. 200 pp. 
222. Catalogue and index of the publications of the Hayden, King, Powell, and Wheeler surveys, by 
L. F. Schmeckebier. 1904. 208 pp. 
227. The United States Geological Survey, its origin, development, organization, and operations. 
1904. 205 pp. 
Correspondence should be addressed to 
The Director, 
United States Geological Survey, 
April, 1904. Washington, D. C. 
