Tracts consisting of observations about the saltness of the sea: an account of a statical hygroscope and its uses: together with an appendix about the force of the air's moisture: a fragment about the natural and preternatural state of bodies/ By the Honourable Robert Boyle ; To all which is premis'd a sceptical dialogue about the positive or privative nature of cold: with some experiments of Mr Boyl's referr'd to in that discourse. By a member of the Royal Society. - Boyle, Robert, 1627-1691 (R. Davis, 1674)