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65. Stratigraphy of the Bituminous Coal Field of Pennsylvania, Ohio, and West Virginia, by 

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66. On a Group of Volcanic Rocks from the Tewau Mountains, New Mexico, and on the Occur- 

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67. The Relations of the Traps of the Newark System in the New Jersey Region, by Nelson 

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68. Earthquakes in California in 1889, by James Edward Keeler. 1890. 8°. 25 pp. Price 5 

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69. A Classed and Annotated Biography of Fossil Insects, by Samuel Howard Scudder. 1890. 

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70. A Report on Astronomical Work of 1889 and 1890, by Robert Simpson Woodward. 1890. 8 C . 

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71. Index to the Known Fossil Insects of the World, including Myriapods and Arachnids, by 

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

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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 

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75. Record of North American Geology for 1887 to 1889, inclusive, by Nelson Horatio Darton. 

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76. A Dictionary of Altitudes iu the United States (Second Edition), compiled by Henry Gannett, 

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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 

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79. A Late Volcanic Eruption in Northern California and its Peculiar Lava, by J. S. Diller. 



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81. Correlation Papers— Cambrian, by Charles Doolittle Walcott. 1891. 8°. 547 pp. 3 pi. 

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82. Correlation Papers— Cretaceous, by Charles A. White. 1891. 8°. 273 pp. 3 pi. Price 20 

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83. Correlation Papers— Eocene, by William Bullock Clark. 1891. 8°. 173 pp. 2 pi. Price 



84.' Correlation Papers— Neocene, by W. H. Dall and G. D. Harris. 1892. 8°. 349 pp. 3 pi. 



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85. Correlation Papers— The Newark System, by Israel Cook Russell. 1892. 8°. 344 pp. 13 pi. 



86. Correlation Papers— Archean and Algonkian, by C.R. Van Hise. 1892. 8°. 549 pp. 12 pi. 



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87. A Synopsis of American Fossil. Brachiopoda, including Bibliography and Synonymy, by 

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88. The Cretaceous Foraminifera of New Jersey, by Rufus Mather Bagg, Jr. 1898. 8 Q . 89 pp. 

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89 Some Lava Flows of the Western Slope of the Sierra Nevada, California, by I . Leslie 

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90 A Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal 

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91. Record of North American Geology for 1890, by Nelson Horatio Darton. 1891. 8°. 88 pp. 



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 

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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. 



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 W.B.Clark. 1893. 8°. 207 pp. 50pl. 



98. Flora of the Outlying Carboniferous Basins of Southwestern Missouri, by David White. 

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99. Record of North American Geology for 1891, by Nelson Horatio Darton. 1892. 8°. 73 pp. 



100 Bibliography and Index of the Publications of the U. S. Geological Survey, 1879-1892, by 

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101. Insect Fauna of the Rhode Island Coal Field, by Samuel Hubbard Scudder. 1893. 8°. 

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102. A Catalogue and Bibliography of North American Mesozoic Invertebrata, by Cornelius 

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