In 1786 the American Philosophical Society published a volume of essays and commentaries by its members on natural curiosities: a partridge with two hearts, a horse with a worm in its eye, a slave girl with mottled skin. More than 220 years later, Professor of Art Jeffrey Schiff has transformed these Enlightenment-era accounts into a series of 16 artworks now on display at Wesleyan’s Ezra and Cecile Zilkha Gallery “Double Vision: Transactions of the American Philosophical Society,” runs through Sun., Feb. 27, with a panel discussion scheduled for Feb. 22 at the gallery. “The troubles we continue to have with…