The basic ground rules of this spirit of inquiry are encapsulated in the title of Benjamin Franklin’s ground-breaking work Experiments and Observations on Electricity (London, 1751; shelfmark: 538.l.5.(6)) just as they are in Medical Inquiries and Observations (4 Vols., Philadelphia, 1805; shelfmark MFR/3019 1 Reel 36:1), the most important writings of Franklin’s friend and fellow Philadelphian, Benjamin Rush (1746-1813).…