[119] Karl Sigismund Kunth, 1788-1850. Appointed professor of botany at Berlin, 1819. Author of _Enumeratio Plantarum_ and other well-known descriptive works. [120] Christian Gottfried Ehrenberg, 1794-1876. Berlin. Student of the microscope, and author of works on the lower forms of plants and animals. [121] Heinrich Friedrich Link, 1767-1851. Professor at Breslau, then at Berlin. Wrote _Anatomy of Plants_ and _Elements of Botanical Philosophy_. [122] _A Flora of North America_; containing abridged descriptions of all the known indigenous and naturalized plants growing north of Mexico; arranged according to the natural system. By John Torrey and Asa Gray. New York. 8vo; vol. i., 1838-1840, pp. xvi, 711; vol. ii., 1841-1843, pp. 504. [123] S. Constantine Rafinesque-Schmaltz, d. 1840. A Sicilian by birth. First arrived in the United States, 1802, for three years; returned in 1815, and explored the Alleghanies and Southern States. “An eccentric but certainly gifted personage, connected with the natural history of this country for the last thirty-five years” [A. G.]. [124] Benjamin D. Greene, 1798-1862. First studied law; then medicine in Scotland and Paris. Devoted himself to botany. “His very valuable herbarium and botanical library were bequeathed to the Boston Natural History Society. He was always a most liberal and wise patron of science” [A. G.]. [125] Jacob Bigelow, M. D., 1787-1870; an eminent Boston physician; author of the _Floral Bostoniensis_, 1814. [126] George B. Emerson, 1797-1881; an eminent teacher in Boston, Mass.; author of _Trees and Shrubs of Massachusetts_. [127] Director of Kew Gardens. [128] Ferdinand Lindheimer, 1801-1879. Died at New Braunfels, Texas. A German. “An assiduous and excellent collector and a keen observer; his notes, full and discriminating, add not a little to the value of the collections” [A. G.]. [129] Edward Tuckerman, 1817-1886; professor at Amherst. “The most profound and trustworthy American lichenologist of the day” [A. G.]. [130] Benjamin Peirce, 1809-1880; professor of mathematics, Harvard University. [131] Carl Geyer, 1809-1853; a German botanist who explored the basin of the upper Mississippi with Nicollet under the Bureau of Topographical Engineers, 1836-1840. Afterwards crossed the Rocky Mountains to Oregon. [132] Lecture to his class in college. [133] Dr. Gray imported a quantity of small evergreens from England and planted the ground extensively, adding also many other kinds. [134] Dr. Rugel came to America, 1842; settled in eastern Tennessee and collected in the southeastern States. [135] To his college class. [136] Dr. Jeffries Wyman. [137] This was Dr. Gray’s second course of Lowell lectures. Dr. John A. Albro, the Congregationalist minister of Cambridge, was his pastor. [138] G. J. Mulder, 1802-1880; professor of chemistry in the University of Utrecht. Wrote on Animal and Vegetable Physiology.