A treatise concerning the exercise of William Walcot, Esq; his art of making salt-water fresh : With a short account of the gain and advantages that ships may have by the exercise thereof. - Walcot, William (Printed, and are to be sold by A. Roper at the Black Boy in Fleetstreet; and B. Aylmer at the Three Pidgeons in Cornhill, 1697)