68. Earthquakes in California in 1889, by J. E. Keeler. 1890. 8°. 25 pp. 69. A classed and annotated bibliography of fossil insects, by S. H. Scudder. 8°. 101 pp.

1890.

70. Report on astronomical work of 1889 and 1890, by R. S. Woodward. 1890. 8°. 79 pp.

71. Index to the known fossil insects of the world, including myriapods and arachnids; by S. H. Scudder. 1891. 8°. 744 pp.

72. Altitudes between Lake Superior and the Rocky Mountains, by Warren Upham. 1891. 8°. 229 pp.

73. The viscosity of solids, by Carl Barus. 1891. 8°. xii, 139 pp., 6 pls. 74. The minerals of North Carolina, by F. A. Genth. 1891. 8°. 119 pp. (Out of stock.)

75. Record of North American geology for 1887 to 1889, inclusive, by N. H. Darton.

1891. 8°. 173 pp.

76. A dictionary of altitudes in the United States (second edition), compiled by Henry Gannett, chief topographer. 1891. 8°. 393 pp. (Out of stock.)

77. The Texan Permian and its Mesozoic types of fossils, by C. A. White. 1891. 8°. 51 pp., 4 pls.

78. A report of work done in the division of chemistry and physics, mainly during the fiscal year 1889-90. F. W. Clarke, chief chemist. 1891. 8°. 131 pp. (Out of stock.)

79. A late volcanic eruption in northern California and its peculiar lava, by J. S. Diller. 1891. 8°. 33 pp., 17 pls. (Out of stock.)

80. Correlation papers-Devonian and Carboniferous, by H. S. Williams. 1891. 8°. 279 pp. (Out of stock.)

81. Correlation papers-Cambrian, by C. D. Walcott. (Out of stock.)

3 pls.

1891. 8°. 447 pp.,

8°. 273 pp., 3 pls.

82. Correlation papers-Cretaceous, by C. A. White. 1891.

(Out of stock.)

83. Correlation papers-Eocene, by W. B. Clark. 1891. 8°. 173 pp., 2 pls. (Out

of stock.)

84. Correlation papers-Neocene, by W. H. Dall and G. D. Harris. 1892. 8°. 349 pp., 3 pls.

85. Correlation papers-the Newark system, by I. C. Russell. 1892. 8°. 13 pls. (Out of stock.)

344 pp.,

86. Correlation papers-Archean and Algonkian, by C. R. Van Hise. 1892. 549 pp., 12 pls. (Out of stock. )

8°.

87. A synopsis of American fossil Brachiopoda, including bibliography and synonymy, by Charles Schuchert. 1897. 8°. 464 pp., 1 pl.

88. The Cretaceous Foraminifera of New Jersey, by R. M. Bagg, jr. 1898. 8°. 89 pp., 6 pls.

89. Some lava flows of the western slope of the Sierra Nevada, California, by F. L. Ransome. 1898. 8°. 74 pp., 11 pls.

90. A report of work done in the division of chemistry and physics, mainly during the fiscal year 1890-91. F. W. Clarke, chief chemist. 1892. 8°.

77 pp.

1891. 8°. 88 pp.

91. Record of North American geology for 1890, by N. H. Darton. 92. The compressibility of liquids, by Carl Barus. 1892. 8°. 96 pp., 29 pls. 93. Some insects of special interest from Florissant, Colorado, and other points in the tertiaries of Colorado and Utah, by S. H. Scudder. 1892. 8°. 3 pls.

94. The mechanism of solid viscosity, by Carl Barus. 1892. 8°. 138 pp. 95. Earthquakes in California in 1890 and 1891, by E. S. Holden.

35 pp.,

1892.

8°.

31 pp.

96. The volume thermodynamics of liquids, by Carl Barus.

8 pls.

97. The Mesozoic Echinodermata of the United States, by W. B. Clark.

1893. 8°.

207 pp., 50 pls. 98. Flora of the outlying Carboniferous basins of southwestern Missouri, by David White. 1893. 8°. 139 pp., 5 pls.

99. Record of North American geology for 1891, by N. H. Darton. 1892. 8°.

73 pp.

100. Bibliography and index of the publications of the U. S. Geological Survey, 1879-1882, by P. C. Warman. 1893. 8°. 495 pp.

101. Insect fauna of the Rhode Island coal field, by S. H. Scudder. 1893. 8°. 27 pp., 2 pls.

102. A catalogue and bibliography of North American Mesozoic Invertebrata, by C. B. Boyle. 1893. 8°. 315 pp.

103. High temperature work in pressure, by Carl Barus.

igneous fusion and ebullition, chiefly in relation to 1893. 8°. 57 pp., 9 pls.

104. Glaciation of the Yellowstone Valley north of the Park, by W. H. Weed. 1893. 8°. 41 pp., 4 pls.

105. The Laramie and the overlying Livingston formation in Montana, by W. H. Weed, with report on flora, by F. H. Knowlton. 1893. 8°. 68 pp., 6 pls. 106. The Colorado formation and its invertebrate fauna, by T. W. Stanton. 1893. 8°. 288 pp., 45 pls. (Out of stock.)

107. The trap dikes of the Lake Champlain region, by J. F. Kemp and V. F. Marsters. 1893. 8°. 62 pp, 4 pls. (Out of stock.)

108. A geological reconnaissance in central Washington by I. C. Russell. 1893. 8°. 108 pp., 12 pls. (Out of stock.)

109. The eruptive and sedimentary rocks on Pigeon Point, Minnesota, and their contact phenomena, by W. S. Bayley. 1893. 8°. 121 pp., 16 pls.

110. The Paleozoic section in the vicinity of Three Forks, Montana, by A. C. Peale. 1893. 8°. 56 pp., 6 pls.

111. Geology of the Big Stone Gap coal field of Virginia and Kentucky, by M. R. Campbell. 1893. 8°. 106 pp., 6 pls.

112. Earthquakes in California in 1892, by C. D. Perrine. 1893. 8°. 57 pp. 113. A report of work done in the division of chemistry during the fiscal years 1891– 92 and 1892-93. F. W. Clarke, chief chemist. 1893. 8°. 115 pp. 114. Earthquakes in California in 1893, by C. D. Perrine. 1894. 8°. 115. A geographic dictionary of Rhode Island, by Henry Gannett.

31 pp. 116. A geographic dictionary of Massachusetts, by Henry Gannett. 126 pp.

23 pp.

1894.

8°.

1894. 8°.

1894. 8°. 67 pp.

117. A geographic dictionary of Connecticut, by Henry Gannett. 118. A geographic dictionary of New Jersey, by Henry Gannett. 1894. 8°. 131 pp. 119. A geological reconnaissance in northwest Wyoming, by G. H. Eldridge. 1894. 8°. 72 pp., 4 pls.

120. The Devonian system of eastern Pennsylvania and New York, by C. S. Prosser. 1894. 8°. 81 pp., 2 pls. (Out of stock.)

121. A bibliography of North American paleontology, 1888–1892, by C. R. Keyes. 1894. 8°. 251 pp.

122. Results of primary triangulation, by Henry Gannett. 1894. 8°. 412 pp., 17 pls. (Out of stock.)

123. A dictionary of geographic positions, by Henry Gannett. 1895.

1 pl. (Out of stock.)

8°. 183 pp.,

124. Revision of the North American fossil cockroaches, with descriptions of new forms, by S. H. Scudder. 1895. 8°. 176 pp., 12 pls.

125. The constitution of the silicates, by F. W. Clarke. 1895. 8°. 109 pp. (Out

of stock.)

126. A mineralogical lexicon of Franklin, Hampshire, and Hampden counties, Massachusetts, by B. K. Emerson. 1895. 8°. 180 pp., 1 pl.

127. Catalogue and index of contributions to North American geology, 1732-1891, by N. H. Darton. 1896. 8°. 1045 pp.

128. The Bear River formation and its characteristic fauna, by C. A. White. 1895. 8°. 108 pp., 11 pls.

129. Earthquakes in California in 1894, by C. D. Perrine. 1895. 8°. 25 pp. 130. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for 1892 and 1893, by F. B. Weeks. 1896. 8°. 210 pp. 131. Report of progress of the division of hydrography for the calendar years 1893 and 1894, by F. H. Newell, topographer in charge. 1895. 8°. 126 pp. 132. The disseminated lead ores of southeastern Missouri, by Arthur Winslow. 1896. 8°. 31 pp., 6 pls.

133. Contributions to the Cretaceous paleontology of the Pacific coast: The fauna of the Knoxville beds, by T. W. Stanton. 1895. 8°. 132 pp., 20 pls.

134. The Cambrian rocks of Pennsylvania, by C. D. Walcott. 1896. 8°. 43 pp., 15 pls.

135. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for the year 1894, by F. B. Weeks. 1896. 8°. 141 pp. 136. Volcanic rocks of South Mountain, Pennsylvania, by Florence Bascom. 1896. 8°. 124 pp., 28 pls.

137. The geology of the Fort Riley Military Reservation and vicinity, Kansas, by Robert Hay. 1896. 8°. 35 pp., 8 pls.

138. Artesian-well prospects in the Atlantic Coastal Plain region, by N. H. Darton. 1896. 8°. 232 pp., 19 pls. (Out of stock.)

139. Geology of the Castle Mountain mining district, Montana, by W. H. Weed and L. V. Pirsson. 1896. 8°. 164 pp., 17 pls.

140. Report of progress of the division of hydrography for the calendar year 1895, by F. H. Newell, hydrographer in charge. 1896. 8°. 356 pp.

141. The Eocene deposits of the Middle Atlantic Slope in Delaware, Maryland, and Virginia, by W. B. Clark. 1896. 8°. 167 pp., 40 pls.

142. A brief contribution to the geology and paleontology of northwestern Louisiana, by T. W. Vaughan. 1896. 8°. 65 pp., 4 pls.

143. A bibliography of clays and the ceramic arts, by J. C. Branner. 1896. 3°.

114 pp.

144. The moraines of the Missouri Coteau and their attendant deposits, by J. E. Todd. 1896. 8°. 71 pp., 21 pls.

145. The Potomac formation in Virginia, by W. M. Fontaine. 1896. 8°. 149 pp.,

2 pls.

146. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for the year 1895, by F. B. Weeks. 1896. 8°. 130 pp. 147. Earthquakes in California in 1895, by C. D. Perrine, assistant astronomer in charge of earthquake observations at the Lick Observatory. 1896. 8°. 23 pp. 148. Analyses of rocks, with a chapter on analytical methods, laboratory of the United States Geological Survey, 1880 to 1896, by F. W. Clarke and W. F. Hillebrand. 1897. 8°. 306 pp. (Out of stock.) 149. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for the year 1896, by F. B. Weeks. 1897. 8°. 152 pp.

150. The educational series of rock specimens collected and distributed by the United States Geological Survey, by J. S. Diller. 1898. 8°. 400 pp., 47 pls.

151. The Lower Cretaceous gryphæas of the Texas region, by R. T. Hill and T. W. Vaughan. 1898. 8°. 139 pp., 35 pls.

152. A catalogue of the Cretaceous and Tertiary plants of North America, by F. H. Knowlton. 1898. 8°. 247 pp.

153. A bibliographic index of North American Carboniferous invertebrates, by S. Weller. 1898. 8°. 653 pp.

154. A gazetteer of Kansas, by H. Gannett. 1898. 8°. 246 pp., 6 pls.

155. Earthquakes in California in 1896 and 1897, by C. D. Perrine, assistant astronomer in charge of earthquake observations at the Lick Observatory. 1898. 8°. 47 pp.

156. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for the year 1897, by F. B. Weeks. 1898. 8°. 130 pp.

157. The gneisses, gabbro-schists, and associated rocks of southwestern Minnesota, by C. W. Hall. 1899. 8°. 160 pp., 6 l., 27 pls.

158. The moraines of southeastern South Dakota and their attendant deposits, by J. E. Todd. 1899. 8°. 171 pp., 27 pls.

159. The geology of eastern Berkshire County, Mass., by B. K. Emerson, 1899. 8°. 139 pp., 9 pls.

160. A dictionary of altitudes in the United States (third edition), compiled by Henry Gannett. 1899. 8°. 775 pp. (Out of stock.)

161. Earthquakes in California in 1898, by C. D. Perrine, assistant astronomer in charge of earthquake observations at the Lick Observatory. 1899. 8°. 31 pp. 1 pl.

162. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for the year 1898, by F. B. Weeks. 1899. 8°. 163 pp. 163. Flora of the Montana formation, by F. H. Knowlton. 1900. 8°. 118 pp., 19 pls. 164. Reconnaissance in 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. 8°. 100 pp., 11 pls.

165. Contributions to the geology of Maine, by H. S. Williams and H. E. Gregory. 1900. 8°. 212 pp., 14 pls.

43 pp., 1 map.

166. A gazetteer of Utah, by Henry Gannett. 1900. 8°. 167. Contributions to chemistry and mineralogy from the laboratory of the United States Geological Survey; F. W. Clarke, chief chemist. 1900. 8°. 166 pp. (Out of stock.)

168. Analyses of rocks, laboratory of the United States Geological Survey, 1880 to 1899, tabulated by F.W. Clarke, chief chemist. 1900. 8°. 308 pp. (Out of stock.)

169. Altitudes in Alaska, by Henry Gannett. 1900. 8°. 13 pp.

170. Survey of the boundary line between Idaho and Montana from the international boundary to the crest of the Bitterroot Mountains, by R. U. Goode. 1900. 8°. 67 pp., 14 pls.

171. Boundaries of the United States and of the several States and Territories, with an outline of the history of all important changes of territory (second edition), by Henry Gannett. 1900. 8°. 142 pp., 53 pls. (Out of stock.) 172. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for the year 1899, by F. B. Weeks. 1900. 8°. 141 pp. 173. Synopsis of American fossil Bryozoa, including bibliography and synonymy, by J. M. Nickles and R. S. Bassler. 1900. 8°. 663 pp. 174. Survey of the northwestern boundary of the United States, 1857-1861, by Marcus Baker. 1900. 8°. 78 pp., 1 map.

175. Triangulation and spirit leveling in Indian Territory, by C. H. Fitch. 1900. 8°. 141 pp., 1 map.

176. Some principles and methods of rock analysis, by W. F. Hillebrand. 1900.

8°. 114 pp.

(Out of stock.)

177. Catalogue and index of the publications of the United States Geological Survey, 1880-1901, by P. C. Warman. 1901. 8°. 858 pp. 178. The El Paso tin deposits, by W. H. Weed. 1901. 8°.

15 pp., 1 pl.

179. Bibliography and catalogue of the fossil vertebrata of North America, by O. P. Hay. 1902. 8°. 868 pp.

180. The occurrence and distribution of

corundum in the United States, by J. H.

Pratt. 1901. 8°. 98 pp., 14 pls. (Out of stock.)

181. Results of primary triangulation and primary traverse, fiscal year 1900-1901, by H. M. Wilson, J. H. Renshawe, E. M. Douglas, and R. U. Goode. 1901. 8°.

240 pp., 1 map.

182. A report on the economic geology of the Silverton quadrangle, Colorado, by F. L. Ransome. 1901. 8°. 265 pp., 16 pls.

183. A gazetteer of Porto Rico, by Henry Gannett. 1901. 8°. 51 pp.

184. Oil and gas fields of the western interior and northern Texas coal measures and of the Upper Cretaceous and Tertiary of the western Gulf Coast, by George I. Adams. 1901. 8°. 64 pp., 10 pls. (Out of stock.)

185. Results of spirit leveling, fiscal year 1900-1901, by H. M. Wilson, J. H. Renshawe, E. M. Douglas, and R. U. Goode. 1901. 8°. 219 pp.

186. On pyrite and marcasite, by H. N. Stokes. 1901. 8°. 50 pp.

187. Geographic dictionary of Alaska, by Marcus Baker. 1901. 8°. 446 pp. (Out of stock.)

188. Bibliography of North American geology, paleontology, petrology, and min

eralogy for the years 1892-1900, inclusive, by F. B. Weeks. 1902. 8°. 717 pp. 189. Index to North American geology, paleontology, petrology, and mineralogy for the years 1892-1900, inclusive, by F. B. Weeks. 1902. 8°. 337 pp. 190. A gazetteer of Texas, by Henry Gannett. 1902. 8°. 162 pp., 8 pls. 191. North American geologic formation names: Bibliography, synonymy, and distribution, by F. B. Weeks. 1902. 8°. 448 pp.

192. A gazetteer of Cuba, by Henry Gannett. 1902. 8°. 113 pp., 8 pls. 193. The geological relations and distribution of platinum and associated metals, by J. F. Kemp. 1902. 8°. 95 pp., 6 pls.

51 pp., 1 pl.

194. Northwest boundary of Texas, by Marcus Baker. 1902. 8°. 195. Structural details in the Green Mountain region and in eastern New York (second paper), by T. N. Dale. 1902. 8°. 22 pp., 4 pls.

196. Topographic development of the Klamath Mountains, by J. S. Diller. 1902. 8°. 69 pp., 13 pls.

197. The origin of certain place names in the United States, by Henry Gannett. 1902. 8°. 280 pp. (Out of stock.)

198. The Berea grit oil sand in the Cadiz quadrangle, Ohio, by W. T. Griswold. 1902. 8°. 43 pp., 1 pl.

199. Geology and water resources of the Snake River Plains of Idaho, by I. C. Russell. 1902. 8°. 192 pp., 25 pls.

200. Reconnaissance of the borax deposits of Death Valley and Mohave Desert, by M. R. Campbell. 1902. 8°. 23 pp., 1 pl.

201. Results of primary triangulation and primary traverse, fiscal year 1901-2, by H. M. Wilson, J. H. Renshawe, E. M. Douglas, and R. U. Goode. 1902. 8°. 164 pp., 1 pl.

202. Tests for gold and silver in shales from western Kansas, by Waldemar Lindgren. 1902. 8°. 21 pp.

203. Bibliography and index of North American geology, paleontology, petrology, and mineralogy for the year 1901, by F. B. Weeks. 1902. 8°. 144 pp. 204. Fossil flora of the John Day Basin, Oregon, by F. H. Knowlton. 1902.

153 pp., 17 pls.

8°.

205. Mollusca of the Buda limestone, by G. B. Shattuck, with an appendix on the corals of the Buda limestone, by T. W. Vaughan. 1903. 8°. 94 pp., 27 pls. 206. A study of the fauna of the Hamilton formation of the Cayuga Lake section in central New York, by H. F. Cleland. 1903. 8°. 112 pp., 5 pls.