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66. On a Group of Volcanic Rocks from the Tewan Mountains, New Mexico, and on the Occurrence 
of Primary Quartz in Certain Basalts, by Joseph Paxson Hidings. 1890. 8°. 34 pp. Price 5 cents. 
67. The Relations of the Traps of the Newark System in the New Jersey Region, by Nelson Horatio 
Darton. 1890. 8°. 82 pp. Price 10 cents. 
68. Earthquakes in California in 1889, by James Edward Keeler. 1890. 8°. 25 pp. Price 5 cents. 
69. A Classed and Annotated Bibliography of Fossil Insects, by Samuel Hubbard Scudder. 1890. 
8°. 101 pp. Price 15 cents. 
70. 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 Upkam. 1891. 8°. 
229 pp. Price 20 cents. 
73. The Viscosity of Solids, by Carl Barus. 1891. 8°. xii, 139 pp. 6 pi. Price 15 cents. 
74. The Minerals of North Carolina, by Frederick Augustus Genth. 1891. 8°. 119 pp. Price 15 
cents. 
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 pp. 
4pl. Price 10 cents. 
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. S. Diller. 1891. 8°. 
33pp. 17 pi. Price 10 cents. 
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°. 447 pp. 3 pi. Price 
25 cents. 
82. Correlation Papers— Cretaceous, by Charles A. White. 1891. 8°. 273 pp. 3 pi. Price 20 cents. 
83. Correlation Papers— Eocene, by William Bullock Clark. 1891. 8°. 173 pp. 2 pi. Price 15 cents. 
84. Correlation Papers— Neocene, by W. H. Dall and G. D. Harris. 1892. 8°. 349 pp. 3 pi. Price 
25 cents. 
85. Correlation Papers — The Newark System, by Israel Cook Russell. 1892. 8°. 344 pp. 13 pi. 
Price 25 cents. 
8G. Correlation Papers— Archean and Algonkian, by C. R. Van Hise. 1892. 8°. 549 pp. 12 pi. 
Price 25 cents. 
90. A Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal 
Tear 1890-'91. F. W. Clarke, Chief Chemist. 1892. 8°. 77 pp. Price 10 cents. 
91. Record of North American Geology for 1890, by Nelson Horatio Darton. 1891. 8°. 88 pp. Price 
lOcents. 
92. The Compressibility of Liquids, by Carl Barus. 1892. 8°. 96 pp. 29 pi. Price 10 cents. 
93. Some Insects of Special Interest from Florissant, Colorado, and Other Points in the Tertiaries 
of Colorado and Utah, by Samuel Hubbard Scudder. 1892. 8°. 35 pp. 3 pi. 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°. 31 pp. 
Price 5 cents. 
96. The Volume Thermodynamics of Liquids, by Carl Barus. 1892. 8°. 100 pp. Price 10 cents. 
97. The Mesozoic Echinodermata of the United States, by William Bullock Clark. 1893. 8°. 207 
pp. 50 pi. Price 20 cents. 
98. Flora of the Outlying Carboniferous Basins of Southwestern Missouri, by David White. 1893. 
8°. 139 pp. 5 pi. 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. S. 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 Scudder. 1893. 8°. 27 pp. 
2 pi. Price 5 cents. 
102. A Catalogue and Bibliography of North American Mesozoic Invertebrata, by Cornelius Breck- 
inridge Boyle. 1893. 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. 9 pi. Price 10 cents. 
104. Glaciation of the Yellowstone Valley north of the Park, by Walter Harvey Weed. 1893. 8°. 
41pp. 4 pi. Price 5 cents. 
105. The Laramie and the Overlying Livingston Formation in Montana, by Walter Harvey Weed, 
With Report on Flora, by Frank Hall Knowlton. 1893. 8°. 68 pp. 6. pi. Price 10 cents. 
