AD V ERTISEMEKT. V 



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

 Israel C. White. 1891. 8^. 212 pp. 11 pi. Price 20 cents. 



66. On a Gronp of Volcanic Kocks 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 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^. 

 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^. 

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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. 

 1891. 80. 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 Physics, mainly during the Fiscal 

 Year 1889-'90. F. W. Clarke, Chief Chemist. 1891. S'^. 131 pp. Price 15 cents. 



79. A Late Volcanic 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 Walcott. 1891. S^. 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 

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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. 

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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 

 Charles Sohuchert. 1897. 8^. 464 pp. Price 30 cents. 



88. The Cretaceous Foraminlfera of New Jersey, by Rufus Mather Bagg, Jr. 1898. S^. 89 pp. 

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89. Some Lava Flows of the Western 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, mainly during the Fiscal 

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

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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. 

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96. The Volume Thermodynamics of Liquids, by Carl Barus. 1892. 8^. 100 pp. .Price 10 cents. 



97. The Mesozoic Echinodermaia of the United States, by W. B. Clark. 1893. 8^. 207 pp. 50 pi. 

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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. 

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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, by Cornelius 

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