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 / by John Willis, honorary member of the Philadelphia Medical Society.

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 / by John Willis, honorary member of the Philadelphia Medical Society. Credit: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.). Public Domain Mark