JOSEPH LEIDY. 437 



religion, and no man cared less than he, if the service were only ren- 

 dered, whether it was in his own name cr in that of others. 



As to College honors, Dr. Hill received the degree of Doctor of 

 Divinity from Harvard University in I860, and that of Doctor of Laws 

 from Yale College in 1863. He was a member of the American Philo- 

 sophical Society, of the Massachusetts Historical Society, and of many 

 other associations of like character. 



The following is a partial list of Dr. Hill's publications in other 

 than pamphlet form : — 



Elementary Treatise on Arithmetic, 1845. 



Geometry and Faith, 1849. 2d edition, revised and enlarged, 1874. 



3d edition, greatly enlarged, 1882. 

 First Lessons in Geometry, 1855. 



Jesus the Interpreter of Nature, and other Sermons, 1860. 

 Second Book in Geometry, 1863. 



Natural Sources of Theology, reprinted from the Bibliotheca Sacra, 1874. 

 Arithmetic (Wentworth and Hill), 1883. 

 In the Woods and Elsewhere, 1888. 



JOSEPH LEIDY. 



Joseph Leidy, a member of this Academy since May 30, 1848, 

 died, after a brief illness, at his residence in Philadelphia, Pa., on 

 April 30, 1891. His ancestors were of French-German descent, and 

 came to this country as missionaries. His father, Philip Leidy, was 

 born in Montgomery Co., Pa., in 1791, and married Catherine Melick. 



Joseph Leidy was the third child by this marriage, and was born in 

 Philadelphia, September 9, 1823. His mother died when he was a 

 year and a half old ; later his father married Christiana Melick, a sister 

 of his first wife. She proved to be an admirable mother to Joseph, and 

 to her watchful care and direction is due in great measure his choice 

 of life work. His early education was obtained in private schools, and 

 even during this period he manifested a marked inclination toward the 

 study of natural history, being particularly interested in plants and 

 minerals. After hearing a lecture on these subjects, given by an itin- 

 erant lecturer in the schoolhouse, young Leidy procured text-books, 

 and began the systematic study of botany and mineralogy. From an 

 early age he showed great skill in drawing. This power became so 

 marked that at the ajre of sixteen his father removed him from school 

 with the intention of having him become an artist. At this period he 

 spent much of his time in a wholesale drug-store near his home; here 



