686 THE POPULAR SCIENCE MONTHLY. 



parative Anatomy of the Eye of Vertebrated Animals," and graduated 

 as Doctor of Medicine in the spring of 1844. 



Immediately after receiving his degree, his first work in connection 

 with the university was as assistant in the chemical laboratories of 

 Drs. Hare and James B. Rogers. He began the practice of medicine 

 in the fall of 1844, and continued it for two years, when he resolved 

 to devote himself wholly to teaching. This course he has never had 

 occasion to regret. His qualifications, natural and acquired, would 

 undoubtedly have secured for him brilliant success as a practitioner, 

 but his work as student and teacher has brought him not only satis- 

 factory pecuniary reward, but also other things to which he attaches 

 far more importance peace of mind, sufficient leisure to pursue his 

 favorite studies, and freedom from the toils and responsibilities which 

 attend the daily life of the practicing physician. 



In the winter of 1844, in addition to his work in the laboratory of 

 Dr. Rogers, he assisted Dr. Goddard, who was then Demonstrator of 

 Anatomy in the university. While yet a student he had attracted the 

 attention of Dr. Horner, the Professor of Anatomy, by his success in 

 making a beautiful preparation of the ducts of the lachrymal glands, 

 and this interest was sufficient to secure his appointment as Prosector 

 to the chair of Anatomy in the winter of 1845. 



In the year 1846 Dr. Leidy was elected Demonstrator of Anatomy 

 in the Franklin Medical College. He held this position, however, only 

 during the first session, and the next spring again associated himself 

 with Dr. Horner, and gave a private course of anatomical lectures to 

 his students and others. 



In the spring of 1848 he accompanied Dr. Horner to Europe, and 

 enjoyed, for the first time, a long-desired opportunity of examining 

 the museums and hospitals of England, Germany, and France. 



On his return he gave a course of lectures on microscopic anat- 

 omy, and in the spring of 1849 began a course on physiology in the 

 Medical Institute, but owing to ill health, induced by incessant labor, 

 he was obliged to take a rest extending over several months. 



In the spring of 1850 Dr. George B. Wood was transferred from the 

 chair of Materia Medica to that of Practice of Medicine in the Univer- 

 sity of Pennsylvania. Desiring to form an illustrative collection of 

 specimens, models, and drawings, he was accompanied to Europe by 

 Dr. Leidy, whose services in the selection of the material required will 

 be evident to those w r ho visit the museum of the university. 



In the winter of 1852 Dr. Horner, who had been in ill health for 

 some time, was unable to continue his course. With the consent of the 

 Board of Trustees, he appointed Dr. Leidy as his substitute, and so 

 acceptable to faculty, trustees, and students were the lectures deliv- 

 ered in completion of the course, that, on the death of Dr. Horner, Dr. 

 Leidy was elected Professor of Anatomy in the spring of 1853. 



During the war he was surgeon to Satterlee Military Hospital. His 



