Collections for an essay towards a materia medica of the United States : read before the Philadelphia Medical Society, on the twenty-first of February, 1798 Collections for an essay towards a materia medica of the United States. Part 1 Barton, Benjamin Smith, 1766-1815. Materia Medica Philadelphia : Printed, for the author, by Way & Groff, 1798 Barton, Benjamin Smith, 1766-1815, publisher. Way, Andrew, printer. Groff, Joseph, -1802., printer. Philadelphia Medical Society. Addresses Text vii, [1], 49, [1] p. nlm:nlmuid-2542050R-bk 2542050R http://resource.nlm.nih.gov/2542050R English United States The National Library of Medicine believes this item to be in the public domain : https://creativecommons.org/publicdomain/mark/1.0/