An inquiry into the effects of light in respiration [electronic resource] : submitted, as an inaugural essay, 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 Joseph Trent, of Richmond, Virginia, member of the Philadelphia medical and chemical societies. [Five lines from Lavoisier's Elements of chemistry].