An oration, delivered February 4, 1774, before the American Philosophical Society, held at Philadelphia : Containing, an enquiry into the natural history of medicine among the Indians in North-America, and a comparitive view of their diseases and remedies, with those of civilized nations. Together with an appendix, containing, proofs and illustrations. By Benjamin Rush, M.D. Professor of chemistry in the College of Philadelphia. [Four lines from Malebranche in French].