HALES, STEPHEN. Philosophical Experiments: containing Useful and Necessary Instructions for such as undertake long Voyages at Sea. Shewing how Sea-Water may be made Fresh and Wholsome: And how Fresh-Water may be preserv'd Sweet. How Biscuit, Corn, &c. may be secured from the Weevel, Meggots, and other Insects. And Flesh preserv'd in hot Climates, by Salting Animals whole... London, 1739. 8vo, contemporary calf, spine dry, joints starting, rubbed. One engraved plate.