The contents are as follows. (i) 'Of abstract ideas as applied to natural philosophy', 1767. (Folio 1.) Monboddo number 14. (ii) 'Of the system of the universe', undated. (Folio 12.) Numbered 303. (iii) 'Of numbers and of their influence in the system of the universe; of musical concords; of the Pythagorean philosophy; and of the Ideas of Plato', undated. (Folio 18.) Monboddo number 30. (iv) 'Of the origin of virtue', undated. (Folio 75.) Monboddo number 8. (v) 'Of beauty', 1772. (Folio 84.) Monboddo number 7. Followed (folio 90) by page 97 and the wrapper of a paper 'Of taste, of the beautifull', undated. Monboddo number 6. (vi) 'Of metaphysics as derived from physics', 1775. (Folio 92.) Monboddo number 37. (vii) Philosophical definitions, axioms and propositions, 1780. (Folio 109.) Monboddo number 190. (viii) 'of the political history of Man. Book I', undated. (Folio 177.) Monboddo number 72.