ADVERTISEMENT. . VII 



135. Bibliography and Index of XortU American Geology. Paleontology, Petrology, and Miner- 

 alogy for the Year 1894. by V. B. AVeeks. 1896. 8^. 141 ])p. Price 15 cents. 



136. Volcanic Kocks of South Mountain, Pennsylvania, by Florence Basconi. 1896. S'^. 124 pp. 

 28 pi. Price 15 cents. 



137. The Geology of the Fort Riley Military Reservation and Vicinity. Kansas, by Rol)ert Hay. 

 1896. 8^. 35 pp. 8 pi. Price 5 cents. 



138. Artesian-A\'ell Prospects in the Atlantic Coastal Plain Region, by .\. H. Darton. 1896. 8"^. 

 228 pp. 19 pi. Price 20 cents. 



139. Geology of the Castle Mountain Mining District, Montana, by W. H. Weed and L. V. Pirs- 

 son. 1896. 8°. 164 pp. 17 pi. Price 15 cents. 



140. Report of Progress of the Division of Hydrography lor the Calendar Year 1895, by Frederick 

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141. The Eocene Dej>osit8 of the Middle Atlantic Slope in Delaware, Marvland, and Virginia, 

 by William Bullock Clark. 1896. 8^". 167 pp. 40 pi. Price 15 cents. 



142. A Brief Contribution to the Geology and Paleoutcdogy of Northwestern Louisiana, by 

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143. A Bibliography of Clays and the Ceramic Arts, by John C. Branner. 1896. 8"^. 114 pp. 

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144. The Moraines of the Missouri Coteau and their Attendant Deposits, by .James Edward Todd. 

 1896. 8°. 71 pp. 21 pi. Price 10 cents. 



145. The Potomac Formation in Virginia, by W. M. Fontaine. 1896. 8^. 149 pp. 2 pi. Price 

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146. Bibliography and Index of North American Geology, Paleontology, Petrologv, and Miner- 

 alogy for the Y'ear 1895, by K. B. Weeks. 1896. 8'-. 130 pp. Price 15 cents. 



147. Earthquakes iu California in 1895, by Charles D. Perrine, A.ssistant Astronomer in Charge 

 of Earthquake Observations at the Lick Observatory. 1896. 8^ . 23 pp. Price 5 cents. 



148. Analyses of Rocks, with a Chapter on Analytical Methods, Laboratory of the United States 

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149. Bibliography and Index of North American Geology, Paleontology, Petrology, and Miner- 

 alogy for the Year 1896, by Fred Bough ton Weeks. 1897. 8°. 152 pp. Price 15 cents. ' 



1.50. The Educational Series of Rock Specimens collected and distrilmted by the United States 

 Geological Survey, by Joseph Silas Diller. 1898. 8^'. 398 pp. 47 pi. Price 25 cents. 



151. The Lower Cretaceous Gryph.-eas of the Texas Region, by R. T. Hill and T. Wayland 

 Vaughan. 1898. 8=. 139 pp. 25 pi. Price 15 cents. 



152. A Catalogue of the Cretaceous and Tertiarv Plants of North America, by F. H. Knowlton. 

 1898. 8"^. 247 jip. Price 20 cents. 



153. A Bibliographic Index of North American Carboniferous Invertebrates, by Stuart Weller. 

 1898. 8^^. 653 pp. Price 35 cents. 



154. A Gazetteer of Kansas, by Henry Gannett. 1898. 8"^. 246 pp. 6 pi. Price 20 cents.' 



155. Earthquakes iu California in 1896 and 1897, by Charles D. Perrine, Assistant Astronomer 

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156. Bibliography and Index of North American Geology, Paleontology, Petrology, and Miner- 

 alogy for the Year 1897, by Fred Boughtou Weeks. 1898. 8^\ 130 pp. Price 15 cents. 



157. The Gneisses, Gabbro-Schists, and Associated Rocks of Southeastern Minnesota, by Chris- 

 topher Webber Hall. 1899. 8-. 160 pp. 27 pi. Price 45 cents. 



158. The Moraines of Southeastern South Dakota and their Attendant Deposits, by James Edward 

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1.59. The Geology of Eastern Berkshire County, Massachusetts, by B. K. Emerson. 1899. 8^. 

 139 pp. 9 pi. Price 20 cents. 



160. A Dictiouarv of Altitudes in the United States (Third Edition), compiled by Henry 

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161. Earthquakes iu California in 1898, by Charles D. Perrine, Assistant Astronomer in Charge 

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162. Bibliography and Index of North American Geology, Paleontology, Petrology and Miner 

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163. Flora of the Montana Formation, by Frank Hall Knowlton. 1900. 8-. 118 pp. Price 15 

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161. Reconnaissance in the Rio Grande Coal Fields of Texas, by Thomas Wayland Vaughan, 

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 100 pp. 11 111. and maps. Price 20 cents. 



165. Contributions to the Geology of Maine, bv Henry S. Williams and Herbert E. Gregorv. 

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166. A Gazetteer of Utah, by Henry Gannett. 1900. 8-\ 43 pp. 1 map. Price 15 cents. 



167. Contributions to Chemistry and Mineralogy from the Laboratory of the United States 

 Geological Survey, Frank W. Claik(^, Chief Cliemist. 1900. 8'-'. 166 ]ip. Price 15 cents. 



168. Analyses of Rocks, Laboratorv of the United States Geidogical Survev, 1880 to 1899, 

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169. Altitudes in Alaska, by Henry Gannett. 1900. 8^. 13 pp. Price 5 cents. 



170. Survey of the Boundary Line between Idaho and Montana from the International Boundary 

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