IV ADVERTISEMENT. 



44. Bibliography of North American Geology t'oi L886, by Nelson H.Darton. 1887. 8 . 35 pp. 

 Price 5 ri ni s. 



15. The Present Condition of Knowledge of the Geolog\ of Texas, by Robert T. Hill. 1887. 8 

 94 pp. Price LO cents. 



4*i. Nature and Origin of Deposits of Phosphate of Lime, by R. A. F. Penrose, ii with an Intro- 

 duction by N. S. Shaler. L888. 8°. U3 pp. Price 15 cents. 



17. Analyses of Waters of the Yellowstone National Park, with an Account of the Methods "1 

 Analysis employed, bj Frank Austin Gooch and James Edward Whitfield. 1888. 8 . 84 pp. frice 

 10 rents. 



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

 pp. Price in cents. 



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

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



50. Formulas ami Tables to Facilitate the Construction and Use of Maps, bj 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 Decaj el' Rocks ami Origin of the Red Color of Certain Formations, bj Israel 

 Cook Russell. L889. 8°. 65pp. 5 pi. Price 10 cents. 



53. The Geology of Nantucket, by Nathaniel Southgate Shaler. L889. 8°. 55 pp. 10 pi. Price 

 10 cents. 



54. On the Thermo- Electric Measurement of High Temperatures, by Carl Barns. 1889. 8°. 

 313 pp., incl.l pi. 11 pi. Price 25 cents. 



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

 year 188l>-'87. Frank Wigglesworth Clarke, chief chemist. 1889. 8. 96 pp. Price 10 cents. 



56. Fossil Wood ami Lignite of the Potomac Formation, bj Frank Hall Knowlton. 1889. 8 . 

 72 pp. 7 pi. Price 10 cents. 



57. A Geological Reconnoissance in Southwestern Kansas, by Robert Hay. 1890. 8 . 49pp. 

 2 pi. Price 5 cents. 



58. The Glacial Boundary in Western Pennsylvania, Ohio, Kentucky, Indiana, ami Illinois, by 

 George Frederick Wright, jwith an introduction by Thomas Chrowder Chamberlin. 1890. 8 . 112 

 pp. incl. 1 pi. 8 pi. Price 15 cents. 



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

 pp. 1 pi. Price 10 cents. 



00. K'eport of "oik done in the 1 >i vision 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 in the Mineralogy of the Pacific Coast, by William Harlow Melville and W'al- 

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



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

 tributien to the subject of dynamic metaraorphism in eruptive locks, by George Huntington Williams. 

 with an introduction by Roland Duer Irving. 1890. 8°. 241pp. 16 pi. Price 30 cents. 



63. A Bibliography of Paleozoic Crustacea from 1698 bo 1889, including a list of North Amer- 

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

 Price 15 cents 



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°. 60pp. 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 rowan Mountains, New Mexico, and on the occm 

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

 cents. 



67. The relations of the Traps of the Newark System in the New Jersej Region, bj Nelson 

 Horatio Darton. 1890. 8°. 82pp. Price 10 cents. 



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

 i ents. 



69. A Classed and Annotated Biographj of Fossil Insects, i>\ Samuel Howard Scudder. 1890. 

 s 10] pp, Price 15 cents. 



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

 79 pp. Price in cents. 



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

 Samuel Hubbard Scudder. 1891. 8°. 744 pp. Price 50 cents. 



72. Altitudes between Lake Superioi and thi Rockj M l tains, by Warren Upham. 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. 



7t. the .Minerals of North Carolina, by Frederick Augustus Genth. 1891. 8 . 119 pp. Price 

 N 15 cents. 



75. Record of North American Geology for 1SN7 to 18s;i. inclusive, liv Nelson Horatio Darton 

 1891. 8 . 17:; pp. Price 15 cents. 



.ii. \ Dictionary of Altitudes in the United States (second edition), compiled by Henry Gannett, 

 chief topographer. 1891. 8 . 393 pp. Price 25 cuts. 



