A description of ventilators : whereby great quantities of fresh air may with ease be conveyed into mines, goals, hospitals, work-houses and ships, in exchange for their noxious air ; an account also of their great usefulness in many other respects: as in preserving all sorts of grain dry, sweet, and free from being destroyed by weevels, both in grainaries and ships, and in preserving many other sorts of goods ; as also in drying corn, malt, hops, gun-powder, &c. and for many other useful purposes ; which was read before the Royal Society in May 1741 /

Main Author: Hales, Stephen, 1677-1761.
Format: Book
Language: English
Published: London : Printed for W. Innys, at the West End of St. Paul's; R. Manby, over against the Old Bailey on Ludgate-Hill; and T. Woodward, 1743
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