1Thomas Jefferson to Adamo Fabbroni, Antoine Gouan, Lacepede, Marc Auguste Pictet, and André Thoüin, 6 March 1815 (Jefferson Papers)
Doct r Barton , my friend, proposing, for the benefit of his health, a voyage across the Atlantic , and a trial of the air of Europe , will probably visit Florence in the course of his travels. he is one of the Vice presidents of the American Philosophical society , Professor of Natural history, Botany, Materia Medica, and of the Institutes and Clinical practice of Medecine in the University...