VG, 2 Vols as 1, 2nd (1796) & 1st ed (1799), 9 pls, VG+. In half modern pigskin over grey boards, worn at corners. Soiled spine, gilt title to maroon calf label, rubbed along joints. Internally, Smeaton, (Circular Motion, Mechanic Power & the Collision of Bodies), 2nd ed, 1796, [3], (iv-vii), [1], [1], 2-110, [2] adverts, 7 pls (all folding), text & pls watermarked 1795. Bound With: Venturi, Motion in Fluids, 1st ed, 1799, [3], (iv-viii), [1], 2-75 pp, [1] adverts, 2 pls (folding), text watermarked 1797, pls wm 17??. Edges uncut, some spotting & light offsetting, new endpapers, small circular stamp to corner fep. (251*150 mm). (ESTC N3262. Lowndes 1692 for later. ESTC T10184.