1. An inaugural dissertation, containing an enquiry into the existence of the living principle and causes of animal life: submitted to the examination of the Rev. John Ewing, S.T.P. provost ; the medical professors and trustees of the University of Pennsylvania, for the degree of Doctor of Medicine Author(s): Sawyer, Matthias E. (Matthias Enoch) Publication: Philadelphia : Printed by T. Dobson, at the stone-house, no. 41, South Second-Street, MDCCXCIII [1793] Subject(s): Biology