[The supplement to a small treatise called Salt-water sweetned : shewing the great advantages both by sea and by land, of sea-water made fresh : together with the Honourable Mr. Boyle’s letter, and the approbation of the Colledge of physicians, of the wholsomness of this water : and also the conditions on which the pantentees and others concern’d, do intend to contract with such as shall please to deal with them for the use of this invention]