A dissertation on the nature and extent of the jurisdiction of the courts of the United States : being a valedictory address delivered to the students of the Law Academy of Philadelphia ... on the 22d April, 1824 / by Peter S. Du Ponceau ; to which are added, A brief sketch of the national judiciary powers exercised in the United States prior to the adoption of the present federal Constitution by Thomas Sergeant ; and the author's discourse on legal education, delivered at the opening of the Law Academy, in February, 1821.