364 THE BOTANISTS OF PHILADELPHIA. 



Chester County, Pennsylvania, receiving a very thorough 

 general education from that well-known school. He was 

 apprenticed in the drug business in 1872, and supplemented 

 this equipment by the regular course of study in the Phila- 

 delphia College of Pharmacy, from which he received his 

 diploma in 1876. Later, he passed two years at the Uni- 

 versity of Pennsylvania, pursuing special studies in organic 

 and analytical chemistry. On May 28, 1878, he formed a 

 business partnership with C. W. Warrington, with whom 

 for five years he conducted a retail drug business at the 

 corner of Fifth and Callowhill Streets, Philadelphia. In 

 1879 he was made asssistant to Professor Sadtler, at the 

 Philadelphia College of Pharmacy, and four years later 

 was appointed Professor of Analytical Chemistry in the 

 college. In this connection he served, and during all the 

 time he had charge of the analytical laboratory, directing 

 many original investigations with students, the results of 

 which have been published in the American Journal of 

 Pharmacy, partly under the joint names of himself and 

 student, and occasionally in the name of the student alone. 

 His own investigations were directed largely to the study of 

 the tannins, with which investigation his name will cer- 

 tainly be linked indissolubly in scientific literature. These 

 investigations he collected together in a most valuable and 

 comprehensive monograph, " The Tannins," * of which Vol- 

 ume I was issued in 1892, and the second volume in 1894. 

 This work was very favorably received both in this country 

 and abroad. His " Hand-Book of Analytical Chemistry,'' 



* The Tannins. A Monograph on the History, Preparation, Properties, 

 Methods of Estimation, and Uses of the Vegetable Astringents. By Henry Trimble, 

 Ph.M. Philadelphia, J. B, Lippincott Company. I, 1892, octavo, pp. 168. II, 1894, 

 pp. 172. 



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