[AERONAUTICS]. PRIESTLEY, JOSEPH. Experiments and Observations on Different Kinds of Air...Second Edition. London, 1775. Volume 1 (of 3 only). Engraved folding frontispiece and engraved folding plate. 8vo, contemporary half calf, spine gilt, some wear along edges. NLM/Blake, p. 363 -- LANGLEY, SAMUEL PIERPONT and CHARLES M. MANLY. Langley Memoir on Mechanical Flight. Washington, 1911. 2 parts in one volume, folio, buckram; ex-library copy -- GREGORY, G. A Dictionary of Arts and Sciences. Philadelphia, 1815-16. 3 engraved titles and 139 engraved plates. 3 vols., 4to, contemporary calf, worn; some browning and dampstaining. First American edition -- MAREY, E.J. Animal Mechanism; A Treatise on Terrestrial and Aerial Locomotion. New York, 1874. Profusion of illustrations in text. 8vo, original red cloth, minor wear to spine ends. (6)