VI ADVERTISEMENT. 



106. The Colorado Formation and its Invertebrate Fatina, by T. W. Stanton. 1893. S". 288 pp. 

 45 pi. Price 20 cents. 



107. The Trap Dikes of the Lalse Champlain Region, by James Fnrman Kemp and Vemon Free- 

 man Marsters. 1393. 8°. 62 pp. 4 pi. Price 10 cents. 



108. AGeologicalEeconnQissancoin Central Washington, by Israel CookEussell. 1893. 8°. 108pp. 

 12pl. Price 15 cents. 



109. The Brnptive ani Sedimentary Rooks on Pigeon Point, Minnesota, and their contact phenom. 

 ena, by William Shirley Bayley. 1893. 8°. 121 pp. 16 pi. Price 15 cents. 



110. The Paleozoic Section in the vicinity of Three Forks, Montana, by Albert Charles Peale. 1893. 

 8°. 56 pp. 6 pi. Price ID cents. 



111. Geology of the Big Stone Gap Coal Field of Virginia and Kentucky, by Marias R. Campbell, 

 1893. 8°. 106 pp. 6 pi, Price 15 cents. 



112. Earthquakes in California in 1892, by Charles D. Perrine. 1893. 8°. 57 pp. Price 10 cents. 



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. Price 15 cents. 



114. Earthquakes in California in 1893, by Charles D. Perrine. 1894. 8°. 23 pp. Price 5 cents. 



115. A Geographic Dictionary of Rhode Island, by Henry Gannett. 1894. 8°. 31pp. Price 5 cents. 



116. A Geographic Dictionary of Massachusetts, by Henry Gannett. 1894. 8°. 126 pp. Price 15 

 cents. 



117. A Geographic Dictionary of Connecticut, by Henry Gannett. 1894. 8°. 67 pp. Price 10 cents. 



118. A Geographic Dictionary of New Jersey, by Henry Gannett. 1894. 8°. 131pp. Price 15 cents. 



119. A Geological Reconnoissance in Northwest Wyoming, by George Homans Eldridge. 1894. 8°. 

 72 pp. 4 pi. Price 10 cents. 



120. The Devonian System of Eastern Pennsylvania and New York, by Charles S. Pressor. 1894. 

 8°. 81 pp. 2 pi. Price 10 cents. 



121. A Bibliography of North American Paleontology, by Charles Rollin Keyes. 1894. 8°. 251pp. 

 Price 20 cents. 



122. Eesultsof Primary Triangulation, by Henry Gannett, 1894. 8°. 412pp. 17pl. Price25cents. 



123. A Dictionary of Geographic Positions, by Henry Gannett. 1895. 8°. 183 pp. 1 pi. Price 15 

 cents. 



124. Revision of North American Fossil Cockroaches, by Samuel Hubbard Scndder. 1895. 8°. 176 

 pp. 12 pi. Price 15 cents. 



125. The Constitution of the Silicates, by Frank Wigglesworth Clarke. 1895. 8°. 109 pp. PricelS 

 cents. 



126. A Mineralogical Lexicon of Franklin, Hampshire, and Hampden counties, Massachusetts, by 

 Benjamin Kendall Emerson. 1895. 8°. 180 pp. 1 pi. Price 15 cents. 



127. Catalogue and index of Contributions to North American Geology, 1732-1891, by Nelson 

 Horatio Darton. 1896. 8°. 1045 pp. Price 60 cents. 



128. The Bear River Formation and its Characteristic Fauna, by Charles A. White. 1895. 8°. 108 

 pp. 11 pi. Price 15 cents. 



129. Earthquakes in California in 1894, by Charles D. Perrine. 1895. 8°. 25 pp. Price 5 cents. 



130. Bibliography and Index of North American Geology, Paleontology, Petrology, and Mineralogy 

 for 1892 and 1893, by Fred Boughton Weeks. 1896. >°. 210 pp. Price 20 cents. 



131. Report of Progress of the Division of Hydrography for the calendar years 1893 and 1894, by 

 Frederick Haynes Newell, topographer in charge. 1895. 8°. 126 pp. Price 15 cents. 



132. The Disseminated Lead Ores of Southeastern Missouri, by Arthur Winslow. 1896. 8°. 31 pp. 

 Price 5 cents. 



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 pi. Price 15 cents. • 



134. The Cambrian Rocks of Pennsylvania, by Charles Doolittle Walcott. 1896. 8°. 43 pp. 15 pi. 

 Price 5 cents. 



In press : 



135. Bibliography and Index of North American Geology, Paleontology, Petrology, and Mineralogy 

 for the year 1894, by F. B. Weeks. 



136. Volcanic Rocks of South Mountain, Pennsylvania, by Florence Bascom. 



137. Geology of the Fort Riley Military Reservation, Kansas, by Robert Hay. 



138. Artesian-well Prospects in the Atlantic Coastal Plain Region, by N. H. Darton. 



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



140. Report of Progress of the Division of Hydrography for the calendar year 1895, by Frederick 

 Haynes Newell, hydrographer in charge. 



141. The Eocene Deposits of the Middle Atlantic Slope in Delaware, Maryland, and Virginia, by Wil- 

 liam Bullock Clark. 



142. A Brief Contribution to the Geology and Paleontology of Northwestern Louisiana, by T. Way- 

 land Vaughan. 



143. A Bibliography of Clays and the Ceramic Arts, by John C. Branner. 

 In preparation : 



— The Moraines of the Missouri Coteau and their attendant deposits, bv Jame.s F-dwar/i t„ja 



— The Potomac Formation in Virginia, b;-^ '>'«' '^' ^'^-''"— - 



