[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]Boyle, Robert, Hon., 1627-1691. Letter ... to the learned Dr. John BealeFitzgerald, Robert, 1638?-16981684Although styling itself a supplement, this is really a revised edition of his "Salt-water sweetned."Bound with Grew, N. New experiments. London, 1684.Title-page wanting, so that it is not certain that this copy is of the 8th edition.text