List of Plates. XI 



Facing page. 

 53. Meriwether Lewis (1774-1809), explorer. From an engraving by Strick- 



land 



278 



54. James Harvey lyinsley (i 787-1 843), naturalist. From a steel engraving. . 282 



55. Stephen Harriman Long ( 1784-1864), army explorer. From an engraving 



by J. C. Buttre of a daguerreotype portrait 286 



56. William Maclurc ( 1 763-1840) , geologist. From an engraving of a painting 



by Thomas Sully 200 



57. Matthew Fontaine Maury (i 806-1 873), geographer. From an engraving 



by George E. Ferine 294 



58. Fran9ois Andre Michaux (i 770-1855), botanist. From an engraving by 



H. B. Hall of a painting by Rembrandt Peale 298 



59. Ormsby MacKnight Mitchel ( 1809-1862 ), astronomer. From an engraving 



by J. C. Buttre ,q2 



60. Samuel Latham Mitchill (1764-1831), "Nestor of American Science." 



From an engraving of a painting by H. Inman 306 



61. Samuel George Morton (i799-i''55i), physician. From an engraving 310 



62. Albert James Myer (182 7- 1880), chief signal officer, U. S. A. From an 



engraving by William Murray ^14 



63. John Strong Newberry ( 1822-1892), geologist. From a photograph 318 



64. Eliphalet Nott ( 1773-1866), president of Union College. From an engrav- 



ing by A. B. Durand of a painting by Ames 322 



65. Thomas Nuttall ( 1786-1859), naturalist. From an engraving by Thom- 



so" 326 



66. Denison Olmsted ( 1 791-1859), physicist. From an engraving by A. H. 



Ritchie ^ ,q 



67. John Grubb Parke (1827-1900), army explorer. From an engraving by 



A. H. Ritchie ,,. 



68. Charles Willson Peale (1741-1827), artist. From a painting by himself. . 338 



69. Rembrandt Peale (1778-1860), artist. From a painting by Thomas Sully. 342 



70. Benjamin Peirce (1809-1880), mathematician. From a photograph 346 



71. Timothy Pickering (1745-1S29), statesman. From an engraving by T. B. 



Welch of a painting by Gilbert Stuart 350 



72. Zebulon Montgomery Pike (1779-1813), army explorer. From an engrav- 



ing by Gimbred 0^4 



73. Joel Roberts Poinsett ( 1779-185 1), statesman. From an engraving 1)y 



J. B. Longacre " ^58 



74. Joseph Priestley (1773-1804), chemist. From an engraving by W\ HoU of 



a painting by Gilbert Stuart ^62 



75. Samuel Purchas ( 1577-1628), author of ' ' Purchas, his pilgrimage." From 



an engraving by H. R. Cook ^65 



76. Constantine Sanuiel Rafinesque (1784-1842), naturalist. From a wood 



cut reproduction of a steel engraving 370 



77. William C. Redfield (i 789-1857), meteorologist. From an engraving by 



A. H. Ritchie ,- , 



78. Charles Valentine Riley (1843-1895), entomologist. From a photograph . 378 



79. David Rittenhouse (i 732-1 796), astronomer. From an engraving by J. B. 



Longacre of a painting by C. W. Peale 382 



80. John Rodgers (181 2-1882), naval explorer. From an engraving by A. H. 



Ritchie 386 



81. Henry Darwin Rogers (1808-1866), geologist. From an engraving by 



L. vS. Punderson ,qq 



82. William Barton Rogers (1804-1882), founder of Massachusetts Institute of 



Technology. From an engraving by H. W. Smith 394 



