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. Philadelphia: Printed, For the Author, 1798.
Digital facsimile of the 1798 edition from the U.S. National Library of Medicine at this link. Digital facsimile of the much-expanded third edition (1810) from Google Books at this link.
Subjects: COUNTRIES, CONTINENTS AND REGIONS › United States , COUNTRIES, CONTINENTS AND REGIONS › United States › American Northeast, PHARMACOLOGY › PHARMACEUTICALS › Materia medica / Herbals / Herbal Medicines, U.S.: CONTENT OF PUBLICATIONS BY STATE & TERRITORY › Pennsylvania