An inaugural dissertation on the chymical analysis and operation of vegetable astringents, with observations on the identity of the vegetable acids : sumbitted to the examination of the Rev. John Ewing, S.T.P. provost ; the trustees and medical professors of the University of Pennsylvania, for the decree of Doctor of Medicine Willis, John, active 1795. Astringents Vegetables -- chemistry Philadelphia : Printed by Alexander M'Kenzie, no. 129, Chesnut-Street, 1795 M'Kenzie, Alexander, 1773?-1822, printer. University of Pennsylvania. Academic Dissertation Text [7], 10-36 p. nlm:nlmuid-2577031R-bk 2577031R http://resource.nlm.nih.gov/2577031R OCLC: 14836434 English The National Library of Medicine believes this item to be in the public domain : https://creativecommons.org/publicdomain/mark/1.0/