Briefe im 19. Jahrhundert als wissenschaftshistorische Quelle. Dargestellt am Beispiel des Briefwechsels des Apothekers A. P. J. Du Menil (1777–1852)

The aim of this article is to demonstrate the importance of scientific communication of pharmacists in the 19th century. 89 letters were analysed both written received by August Peter Julius Du Menil (1777–1852). In the paper also a summary is given about the importance of extensive activity of the pharmacist Du Menil. He was be in correspondence with 39 scientists, for instance 13 physicans and 12 pharmacists. The letters are an interesting document about scientific community in the 19th century.