<j(j A NOTICE OF THE 



from a northern port, beyond the jurisdiction of the French Go- 

 vernment, for New York, from which port he proposed to reach 

 the East Indies, under the protection of the American flag. In 

 those days our neutral flag was little respected, either by France 

 or England. The vessel on board of which he had embarked, 

 was captured by a French privateer, and carried into the port of 

 Dunkirk, where he was deprived of his papers, and detained a 

 prisoner, until his real name and character were ascertained by 

 the French Government, when he was released. He proceeded 

 immediately to Paris, and in March, 1810, he was elected a cor- 

 respondent of the Museum of Natural History of France. About 

 the same time he received a passport, dated Paris, March 5, 1810, 

 which authorized him to embark at Rochelle, on board of an Ame- 

 rican ship bound to Philadelphia. 



The abdication of Louis Napoleon, and other political events 

 in Europe, determined him to become a resident of this city, where 

 he married in the year 1810. 



As already stated, he participated in founding the Academy 

 of Natural Sciences, in 1812, and remained its President until 

 the year 1817, when he resigned, and was succeeded by Mr. 

 Maclure. 



He was engaged in various manufactures, and about the year 

 1815, or 1816, his intimate knowledge of mineralogy and chemis- 

 try, enabled him to commence the manufacture of alum, on the 

 Magothy River, in Maryland. Previous to that date, the entire 

 quantity required in the arts, which is very considerable, was im- 

 ported from abroad. This manufacture was so fully established, 

 that since the year 1818, our own country has been able to supply 

 the home demand. 



He returned from Maryland to Philadelphia, and in 1821 was 

 appointed Professor of Mineralogy in the Philadelphia Museum, 

 and lectured on the subject in that institution. 



About the same period, he was elected the first Professor of 

 Chemistry, in the College of Pharmacy of Philadelphia, but re- 

 signed the ensuing year, after having delivered one course of lec- 

 tures. 



Dr. Troost, in the year 1825, in company with Messrs Maclure, 

 Say, Lesueur, and Robt. Owen, removed to New Harmony, In- 

 diana, where he remained nearly two years. In the year 1827, 

 he settled in Nashville, and in the following year, at the instance 



