An experimental inquiry into the properties of carbonic acid gas or fixed air its mode of operation, use in diseases, and most effectual method of relieving animals affected by it. Being an inaugural thesis, submitted to the examination of the Rev. John Ewing, S.T.P. provost; the Trustees and medical faculty of the University of Pennsylvania, on the 12th day of May, 1797. For the degree of Doctor of Medicine. By Joseph Johnson, of Charleston, (S.C.) member of the Chemical, and honorary member of the Philadelphia Medical Society. [Two lines from Horace] - Johnson, Joseph 1776-1862 (Printed for the author, by Stephen C. Ustick, 1797)