SEYBERT, Adam, chemist, born in Philadelphia, Pennsylvania, 16 May, 1773 ; died in Paris, France, 2 May, 1825. He was graduated at the medical department of the University of Pennsylvania in 1793, and then spent some time at the Ecole des mines in Paris, also studying at the universities of London, Edinburgh, and Gottingen. On his return he settled in Philadelphia, and, acquiring a collection of minerals, devoted his attention specially to the practice and study of chemistry and mineralogy. In 1805 he was called on by the elder Silliman to name the few specimens that at that time constituted the collection belonging to Yale. Dr. Seybert was elected as a Democrat to congress, and served from 27 November, 1809, till 2 March, 1815, and again from 1 December, 1817, till 3 December, 1819. He was chosen a member of the American philosophical society in 1797, and contributed his papers on "Experiments and Observations on Land and Sea Air" and "On the Atmosphere of Marshes" to its transactions during that year. His publication of "The Statistical Annals of the United States from 1789 till 1818" (Philadelphia, 1818) was reviewed by Sydney Smith in the "Edinburgh Review" for January, 1821. In this article occurs the oft-quoted question, " Who reads an American book?" He bequeathed $1,000 for educating the deaf and dumb, and $500 for the Philadelphia orphan asylum.--His son, HENRY (1802-1883), was also educated at the Ecole des mines, and achieved considerable reputation by his analyses of American minerals. Shortly after the death of his father his attention became diverted from science.