An inaugural dissertation on the chemical properties of atmospheric air [electronic resource] : submitted to the examination of the Rev. John Ewing, S.T.P. provost, the trustees and medical professors of the University of Pennsylvania: for a degree of Doctor of Medicine, on the twelfth day of May, 1791. By William R. Cozens, of New-Jersey, member of the Philadelphia Medical Society. [One line of quotation in Latin].