Discourses presented to the Aberdeen Philosophical Society 'An enquiry into those faculties which distinguish man from the rest of the animal creation'; [John] Gregory, pp. 1 - 21. (28 August 1759). ['On the nature and operations of Imagination', continued]; John Farquhar, pp. 22 - 24. ([26] June 1759). 'Of the culture of imagination'; John Farquhar, pp. 25 - 28. ([22] July 1759). 'On the nature of happiness'; David Skene, p. 29 (title only). (11 September 1759). 1759 - 1760