Sentence:  [A]n old Farmer ... uſed, when fuddled over Night, to walk naked, or only in his Shirt, until he had cooled himſelf throughly, ... This Courſe may not be improperly call'd a "Balenum Aerium", and may be of great Uſe to ſober People, as well as the Fuddlers; for running empty, after Sleep and Concoction, warms the "Blood" and "Spirits", <WSD>acutes</WSD> the "Circulations", fans and cools the "Lungs", helps both "Excretion" and "Secretion"; ... 
Meaning of the word marked with <WSD> tags:  To make acute; to sharpen, to whet.