IV ADVERTISEMENT. 



43. Tertiary and Cretaceous Strata of the Tuscaloosa, Tombigbee, and Alabama Rivers, by Eugene 

 A. Smith and Lawrence C. Johnson. 1887. 8°. 189 pp. 21 pi. Price 15 cents. 



44. Bibliography of North American Geology for 1886, by Nelson H. Darton. 1887. 8°. 35 pp. 

 Price 5 cents 



45. The Present Condition of Knowledge of the Geology of Texas, by Robert T. Hill. 1887. 8°. 

 94 pp. Price 10 cents. 



46. Nature and Origin of Dei>osits of Phosphate of Lime, by R. A. F. Penrose, jr., with an Intro- 

 duction by N. S. Shaler. 1888. 8°. 143 pp. Price 15 cents. 



47. Analyses of Waters of the Yellowstone National Park, with an Account of the Methods of 

 Analysis employed, by Frank Austin Gooch and James Edward Whitfield. 1888. 8°. 84 pp. Price 

 10 cents. 



48. On the Form and Position of the Sea Level, by Robert Simpson Woodward. 1888. 8°. 88 

 pp. Price 10 cents. 



49. Latitudes and Longitudes of Certain Points in Missouri, Kansas, and New Mexico, by Robert 

 Simpson Woodward. 1889. 8°. 133 pp. Price 15 cents. 



50. Formulas and Tables to Facilitate the Construction and Use of Maps, by Robert Simpson 

 Woodward. 1889. 8°. 124 pp. Price 15 cents. 



51. On Invertebrate Fossils from the Pacific Coast, by Charles Abiathar White. 1889. 8°. 102 

 pp. 14 pi. Price 15 cents. 



52. Subaerial Decay of Rocks and Origin of the Red Color of Certain Formations, by Israel 

 Cook Russell. 1889. 8°. 65 pp. 5 pi. Price 10 cents. 



53. The Geology of Nantucket, by Nathaniel Southgate Shaler. 1889. 8°. 55 pp. 10 pi. Price 

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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 

 year 1886-'87. Frank Wiggles worth 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 Reconnoissance 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 

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59. The Gabbros and Associated Rocks in Delaware, by Frederick D. Chester. 1890. 8°. 45 

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60. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal 

 year 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 Wal- 

 demar Lindgren. 1890. 8°. 40 pp. 3 pi. Price 5 cents. 



62. The Greenstone Schist Areas of the Menominee and Marquette Regions of Michigan, a con- 

 tribution 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 fi jm 1698 to 1889, including a list of North Amer- 

 ican species and a systematic arrangement of genera, by Anthony W. Vogdes. 1890. 8°. 177 pp. 

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64. A Report of work done in the Division of Chemistry and Physics, mainly during the fiscal 

 year 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. 189L 8°. 212 pp. 11 pi. Price 20 cents. 



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

 rence of Primary Quartz in certain Basalts, by Joseph Paxson Iddings. 1890. 8°. 34 pp. Price 5 

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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. 

 8°. 101pp. Price 15 cents. 



70. A Report on Astronomical Work of 1889 and 1890; by Robert Simpsou 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°. 

 229 pp. Price 20 cents. 



73. The Viscosity of Solids, bv 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 in the United States (second edition), compiled by Henry Gannett, 

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