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 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 [sic] referr'd to in that discourse ; by a member of the Royal Society.
