ADVERTISEMENT. V 
51. On Invertebrate Fossils from the Pacific Coast, by Charles Abiatbar White. 1889. 8°. 102 
pp. 14 pi. Price 15 cents. 
52. Subaerial Decay of Rocks and Origin of the lied Color of Certain Formations, by Israel Cook 
Russell. 1889. 8°. 65 pp. 5 pi. Price 10 cents. 
53. The Geology of Nantucket, by Nathaniel South gate Shaler. 1889. 8°. 55 pp. 10 pi. Price 10 
cents. 
54. On the Thermo -Electric Measurement of High Temperatures, by Carl Barus. 1889. 8°. 313 pp. 
incl. 1 pi. 11 pi. Price 25 cents. 
55. Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal Tear 
1886-'87. Frank Wiggleswortk Clarke, Chief Chemist. 1889. 8°. 96 pp. Price 10 cents. 
56. Fossil Wood and Lignite of the Potomac Formation, by Frank Hall Knowlton. 1889. 8°. 72 
pp. 7 pi. Price 10 cents. 
57. A Geological Reconnaissance in Southwestern Kansas, by Robert Hay. 1890. 8°. 49 pp. 2 pi. 
Price 5 cents. 
58. The Glacial Boundary in Western Pennsylvania, Ohio, Kentucky, Indiana, and Illinois, by George 
Frederick Wright, with an Introduction by Thomas Chrowder Chamberlin. 1890. 8°. 112 pp. 8 pi. 
Price 15 cents. 
59. The Gabbros and Associated Rocks in Delaware, by Frederick D. Chester. 1890. 8°. 45 pp. 
]pl. Price 10 cents. 
60. Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal Tear 
1887-88. F. W. Clarke, Chief Chemist. 1890. 8°. 174 pp. Price 15 cents. 
61. Contributions to the Mineralogy of the Pacific Coast, by William Harlow Melville and Waldemar 
Lindgren. 1890. 8°. 40 pp. 3 pi. Price 5 cents. 
62. The Greenstone Schist Areas of the Menominee and Marquette Regions of Michigan; a Contri- 
bution to the Subject of Dynamic Metamorphism in Eruptive Rocks, by George Huntington Williams ; 
with an Introduction by Roland Duer Irving. 1890. 8°. 241 pp. 16 pi. Price 30 cents. 
63. A Bibliography of Paleozoic Crustacea from 1698 to 1889, including a List of North American 
Species and a Systematic Arrangement of Genera, by Anthony W. Vogdes. 1890. 8°. 177 pp. Price 
15 cents. p 
64. A Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal 
Tear 1888-'89. F. W. Clarke, Chief Chemist. 1890. 8°. 60 pp. Price 10 cents. 
65. Stratigraphy of the Bituminous Coal Field of Pennsylvania, Ohio, and West Virginia, by Israel 
C. White. 1891. 8°. 212 pp. 11 pi. Price 20 cents. 
66. On a Group of Volcanic Rocks from the Tewan Mountains, New Mexico, and on the Occurrence 
oi Primary Quartz in Certain Basalts, by Joseph Paxson Iddings. 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. Reporton 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 Uphana. 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. 8P. 393 pp. Price 25 cents. 
77. The Texan Permian and its Mesozoic Types of Fossils, by Charles A. White. 1891. 8°. 51 pp. 
4 pi. Price 10 cents. 
78. A Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal 
Tear 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°. 
33 pp. 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. 
