An inquiry into the modus operendi of that class of medicines called sedatives : submitted, as an inaugural dissertation, to the examination of the Rev. John Ewing, S.T.P. provost; the trustees & medical faculty, of the University of Pennsylvania, on the thirty-first of May 1800, for the degree of Doctor of Medicine. By Robert Berkeley, of Virginia, member of the Philadelphia Medical and Chemical Societies. [Four lines from Horace].