LIST OF ILLUSTRATIONS. 205 



Page. 



77. Portrait of George Clinton Swallow. From an engraving in American 



Geologist, XXIV, 1899 527 



78. Portrait of Charles Frederick Hartt. From a photograph 529 



79. Portraits of Charles Abiather White, Rush Emery, and Orestes St. John. 



From a photograph taken in 1S69 :v.'A 



80. Portrait of Thomas Brooks Brooks. From a photograph 537 



81. Portrait of Carl Rominger. From a photograph taken about 1879 540 



82. Portrait of Charles Whittlesey. From a photograph taken in December, 



1875 543 



83. Portrait of Edward Travers Cox. From a photograph 548 



«S4. Portrait of Alfred Richard Cecil Sel wyn. From a photograph 549 



85. Portrait of George Little. From a photograph 552 



86. Portrait of John Murrish. From a photograph 552 



87. Portrait of Othniel Charles Marsh. From a photograph 554 



88. Portrait of Joseph Le Conte. From a photograph 561 



89. Portrait of Washington Caruthers Kerr. From a photograph 564 



90. Portrait of Eugene Allen Smith. From a photograph 565 



91. Portrait of John Wesley Powell. From a photograph 566 



92. Ideal cross section of the Black Hills. (After Henry Newton.) From 



Report of Geology and Resources of the Black Hills of Dakota, 1880 . . 569 



98. Portrait of Increase Allen Lapham. From a photograph taken in 1866. . 570 



94. Portrait of Thomas Crowder Chamberlin. From a photograph taken in 



1884 571 



95. Portrait of Roland Duer Irving. From an engraving in American Geolo- 



gist, January, 1889 573 



96. Portrait of J. Peter Lesley. From a photograph .- 584 



97. Map showing routes of Raynolds's expedition in 1859-60, and area cov- 



ered by Hayden's report 588 



98. Portrait of Edward Drinker Cope, with a skull of Loxolophodon rorimtus. 



From a photograph 595 



99. Portrait of Fielding Bradford Meek. From a photograph by Julius Ulke, 



1878 596 



100. Portrait of Frank Howe Bradley. From a photograph 597 



101. Portrait of Joseph Leidy. From an engraving in American Geologist, 



IX, No. 1 598 



102. Portrait of Frederic Miller Endlich. From a photograph 599 



103. Inverted beds of Jackass Creek. (After A. C. Peale. ) From U. S. Geo- 



logical Survey of Montana, 1872 599 



104. Portrait of Albert Charles Peale. From a photograph taken in 1872 600 



105. Portrait of Archibald Robertson Marvine. From a photograph taken in 



1875 600 



106. Sections across the Sierra La Sal. (After A. C. Peale.) From Report 



U. S. Geological and Geographical Survey, 1875 601 



107. Sections across the Sierra El Late. (After W. H. Holmes.) From Report 



U. S. Geological and Geographical Survey, 1875 602 



108. Portrait of William Henry Holmes. From a photograph taken about 



1878 603 



109. Showing areas surveyed and mapped by the Hayden Surveys, 1870-78 . . 604 



110. Portrait of Robert Parr Whitfield. From a photograph... 609 



111 . Map showing area covered by the Fortieth Parallel Survey 610 



112. Portraits of Arnold Hague, Clarence King, and Samuel Franklin 



Emmons. From a photograph 612 



113. Portrait of Grove Karl Gilbert. From a photograph taken about 1874. . . 616 



