Amman, John Conrad

, a Swiss physician, born at Schaffhausen in 1669, applied himself particularly to the teaching of those to speak who were born deaf, and acquired great reputation for this talent both in France and Holland, as well as in his own country. He published the method he had employed, in two small tracts, which are curious, and much sought after: one under the title of “Surdus loquens,” Harlemii, 1692, 8vo; the other, “De Loquela,” Amst. 1700, 12mo; which last, translated into French, is inserted in Deschamps’ “Cours d’education | des sourds et muets,” 1779, 12tno. Amman also published a good edition of the works of Ccelius Aurelianus, 1709, 4to, with Janson D’Almeloveen’s notes. He died at Marmund, in Holland, in 1724. His son, John, born in 1707, was also a physician, but particularly skilled in Botany, on which he gave lectures at Petersburgh, where he was elected a member of the academy of sciences. He was also a member of the Royal Society of London. Being desirous of extending the knowledge of those plants which Gmelin and other travellers had discovered in the different countries of Asiatic Russia, he published “Stirpium rariorum in imperio Rutheno sponte provenientinm icones et descriptiones,” Petersburgh, 1739, 4to, which would have been followed by another volume, if the author had not died in the prime of life, in 1740. ¹