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 and mode of inflation by steam; means to prevent their descent over water; occasional enquiries into the state of the atmosphere, favouring their direction; with various philosophical observations and conjectures, to which is subjoined, mensuration of heights by the barometer, made plain; with extensive tables, the whole serving as an introduction to aerial navigation / by Thomas Baldwin