Provenance : 1). Inscription on f.f. e-p. “Jo. Middleton ....? Ano. 1686 pret. 3s.9d” 2). Inscription on f.f.e-p. “Willm. Fox his Book. June 13 1748. given me by RB.” and his signature “Willm Fox, Warwick” at head of title. 3). Inscription on title “Thos. Bunn his Book 1761” 4). Signature on title “Charles Leonard’s 1768”. 5). 19th century engraved bookplate of Spring Hill College Library inscribed “Mathematical Lecture Room” on front pastedown. 6). Stamp of Mansfield College Library Oxford. 7). Pencilled collation note of Alan Thomas dated 1980._x000b__x000b_After thirty years of experimentation and observation of natural phenomena Boyle appears in this thoughtful treatise to have reached his maturity as a philosopher.” - Fulton. This, perhaps the most important of Boyle’s philosophical writings, is, in the truest sense, a discourse upon the ‘nature of things’.