ADVERTISEMENT. Vv 
70. A Report on Astronomical Work of 1889 and 1890, by Robert Simpson Woodward. 1890. 8°. 
79 pp. Price 10 cents. 
71. Index to the Known Fossil Insects of the World, including Myriapods and Arachnids, by 
Samuel Hubbard Scudder. 1891. 8°. 744 pp. Price 50 cents. 
_ 72, Altitudes between Lake Superior and the Rocky Mountains, by Warren Upham. 1891. 8°. 
229 pp. Price 20 cents. 
73. The Viscosity of Solids, by Carl Barus. 1891. 8°. xii, 139 pp. 6 pl. Price 15 cents. 
74. The Minerals of North Carolina, by Frederick Augustus Genth. 1891. 8°. 119 pp. Price 
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75. Record of North American Geology for 1887 to 1889, inclusive, by Nelson Horatio Darton. 
1891. 8°. 173 pp. Price 15 cents. 
76. A Dictionary of Altitudes in the United States (Second Edition), compiled by Henry Gannett, 
Chief Topographer. 1891. 8°. 393 pp. Price 25 cents. 
77. The Texan Permian and its Mesozoic Types of Fossils, by Charles A. White. 1891. 8°. 51 
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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. Price 15 cents. 
79. A Late Volcanic Eruption in Northern California and its Peculiar Lava, by J. 8. Diller. 
80. Correlation Papers—Devonian and Carboniferous, by Henry Shaler Williams. 1891, 8°. 
279 pp. Price 20 cents. 
81. Correlation Papers—Cambrian, by Charles Doolittle Walcott. 1891. 8°. 547 pp. 3 pl. 
Price 25 cents. 
82. Correlation Papers—Cretaceous, by Charles A. White. 1891. 8°. 273 pp. 3pl. Price 20 
cents. 
83. Correlation Papers—Eocene, by William Bullock Clark. 1891. 8°. 173 pp. 2pl. Price 
15 cents. 
84. Correlation Papers—Neocene, by W. H. Dall and G. D. Harris. 1892. 8°. 349 pp. 3pl. 
Price 25 cents. 
85. Correlation Papers—The Newark System, by Israel Cook Russell. 1892. 8°. 344 pp. 13 pl. 
Price 25 cents. 
86. Correlation Papers—Archean and Algonkian, by C.R. Van Hise. 1892. 8°. 549 pp. 12 pl. 
Price 25 cents. 
87. A Synopsis of American Fossil. Brachiopoda,ineluding Bibliography and Synonymy, by 
Charles Schuchert. 1897. 8%. 464 pp. Price 30 cents. 
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°. Tipp. Price 10 cents. 
91. Record of North American Geology for 1890, by Nelson Horatio Darton. 1891. 8°. 88 pp. 
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92. The Compressibility of Liquids, by Carl Barus. 1892. 8°. 96 pp. 29 pl. Price 10 cents. 
93. Some Insects of Special Interest from Florissant, Colorado, and Other Pointsin the Tertiaries 
of Colorado and Utah, by Samuel Hubbard Seudder. 1892. 8°. 35 pp. 3 pl. Price 5 cents. 
94. The Mechanism of Solid Viscosity, by Carl Barus. 1892. 8°. 138 pp. Price 15 cents. 
95. Earthquakes in California in 1890 and 1891, by Edward Singleton Holden. 1892, 8°. 351 pp. 
Price 5 cents. 
96. The Volume Thermodynamics of Liquids, by Carl Barus. 1892. 8°. 100pp. Price 10 cents. 
97. The Mesozoic Echinodermata of the United States, by W. B. Clark. 1893. 8°. 207 pp. 50pl. 
Price 20 cents. 
98. Flora of the Outlying Carboniferous Basins of Southwestern Missouri, by David White. 
1893. 8°. 139 pp. Spl. Price 15 cents. 
99. Record of North American Geology for 1891, by Nelson Horatio Darton. 1892. 8°. 73 pp. 
Price 10 cents. 
100. Bibliography and Index of the Publications of the U. 8. Geological Survey, 1879-1892, by 
Philip Creveling Warman. 1893. 8°. 495 pp. Price 25 cents. 
101. Insect Fauna of the Rhode Island Coal Field, by Samuel Hubbard Seudder. 1893. 8°. 
27 pp. 2pl. Price 5 cents. 
102. A Catalogue and Bibliography of North American Mesozoic Invertebrata, by Cornelius 
Breckinridge Boyle. 1892. 8°. 315 pp. Price 25 cents. 
103. High Temperature Work in Igneous Fusion and Ebullition, chiefly in Relation to Pressure, 
by Carl Barus. 1893. 8°. 57 pp. 9pl._ Price 10 cents. 
104. Glaciation of the Yellowstone Valley north of the Park, by Walter Harvey Weed. 1893. 8°. 
41 pp. 4pl. Price 5 cents. 
105. The Laramie and the Overlying Livingstone Formation in Montana, by Walter Harvey 
Weed, with Report on Flora, by Frank Hall Knowlton. 1893. 8° 68 pp. 6 pl. Price 10 cents. 
106. The Colorado Formation and its Invertebrate Fauna, by T. W. Stanton. 1893. 8°. 288 
pp. 45 pl. Price 20 cents. 
" 107. The Trap Dikes of Lake Champlain Valley and the Eastern Adirondacks, by James Furman 
emp. 
108. A Geological Reconnoissance in Central Washington, by Israel Cook Russell. 1893. 8°. 
108 pp. 12 pl. Price 15 cents. 
109. The Eruptive and Sedimentary Rocks on Pigeon Point, Minnesota, and their Contact Phe- 
nomena, by William Shirley Bayley. 1893. 8°. 121 pp. 16pl. Price 15 cents. 
