Illustration from "Airopaidia", Chester: 1786, by Thomas Baldwin. Full title of book: "Airopaidia: containing the narrative of a balloon excursion from Chester, the eighth of September, 1785, taken from minutes made during the voyage: hints on the improvement of balloons ... To which is subjoined, mensuration of heights by the barometer, made plain; with extensive tables. The whole serving as an introduction to aërial navigation". *EC75.B1938.786a (A), Houghton Library, Harvard University