Note: - "From the Transactions of the Cambridge Philosophical Society. Vol. X. Part II."
- ULL copies are from the library of Augustus De Morgan, with his annotations. Copy at [DeM] L⁰ (B.P.42) has his notes on t.p.
- ULL copy at [DeM] L0 (B.P.41) is no. 2 in bound vol. of 10 tracts, chiefly by De Morgan, 1859-1869. Extract about syllogism from the Athenaeum, no. 1924, 10 Sept. 1864, pasted on divisional leaf at end.
- ULL copy at [DeM] L⁰ (B.P.42) is no. 5 in bound vol. of 10 tracts by De Morgan, 1847-1863.
- DOI: 10.1163/9789004460409_MOR2-b29497875