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

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

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67. The Relations of the Traps of the Newark System in the NeAv 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 AVork of 1889 and 1890, by Robert Simpson Woodward. 1890. 8°. 

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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 A''iscosity of Solids, by Carl Barns. 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 Dartou. 

 1891. 8°. 173 pp. Price 15 cents. 



76. A Dictionary of Altitudes in 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 Physios, mainly during the Fiscal 

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79. A Late A''olcanio Eruption in Northern California and its Peculiar Lava, by J. S. 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 AValcott. 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 — Ecceue, by William Bullock Clark. 1891. S^. 173 pp. 2 pi. Price 

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84. Correlation Papers— Neocene, by AV. H. Dall and G. D. Harris. 1892. 8-^. 349 pp. 3 pi. 

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

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86. Correlation Papers — Archean and Algoukian, by C.R. VanHise. 1892. 8". 549 pp. 12 pi. 

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

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88. The Cretaceous Foraminifera of New Jetsey, by Rufus Mather Bagg, Jr. 1898. 8*^. 89 pp. 

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89. Some Lava Flows of the AVestern Slope of the Sierra Nevada, California, by F. Leslie 

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

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

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92. The Compressibility of Lifiuids, by Carl Barns. 1892. 8'^. 96 pp. 29 pi. Price 10 cents. 



93. Some Insects of Special luteri'st IVum Florissant, Colorado, and Other Points in the Tertiaries 

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94. The Mechanism of Solid A'iseosity, by Carl Barns. 1892. S'=. 138 pp. Price 15 cents. 



95. Earthquakes in California in 1890 and 1891, by Edward Singleton Holden. 1892. 8>^. 31pp. 

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96. The A''olume Thennodvnamics of Liquids, by Carl Barns. 1892. 8^. 100 pp. Price 10 cents. 



97. The Mesozoic Echiuo<lermaTa of the United States, by AV. B.Clark. 1893. 8°. 207 pp. .50 pi. 

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98. Flora of the Outlying Carboniferous Basins of Southwestern Missouri, bv David AA'hite. 

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

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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, bv Cornelius 

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