A treatise on ventilators. [electronic resource] : Wherein an account is given of the happy effects of many trials that have been made of them; which has occasioned their being received, with general Approbation and Applause, on account of their Utility in many ways, to the great Benefit of Mankind, viz. In refreshing the Noxious Air of Ships, Hospitals and Mines, to the better Preservation of the Health and Lives of Multitudes. In preserving the Timbers of Ships much the longer from decaying. In easily sweetening stinking Cask Water and curing the ill Taste of Milk, from some Food of Cows. In new Methods of distilling Plenty of good Water at Sea. In refreshing the Air, and keeping up, and regulating, the Warmth of Melon and Cucumber Frames, and hot Green-Houses. And in several other useful Improvements. Part first. By Stephen Hales, D. D. Clerk of the Closet to her Royal Highness the Princess of Wales, F. R. S. and Member of the Royal Academies of Sciences at Paris and Bolognia.