PARA du PHANJAS, Abbot. Theory of sensible beings, or complete course of physics, speculative, experimental, systematic and geometrical. New edition, rectified, improved, matched with modern discoveries, & increased by a fifth volume. Paris: Didot fils, 1786. 5 volumes in-8; 40 folding engraved plates. Bound in contemporary marbled basane, spine ribbed and decorated with title and giblets. Worn bindings: snags to the headpieces, bites of the fourth volume largely cracked, marginal wormholes not serious in some volumes. This new edition, increased by a fifth volume devoted to new discoveries, includes a folding plate showing various types of hot-air balloons and a chapter on gases, aerostatic balloons and their direction. Uncommonly complete work.