HELLOT, JEAN. L'Art de la Teinture des Laines, et des Étoffes de Laine. xix, [5], 631 pages, including half-title * ROSA, MICHELE. Delle Porpore e delle Materie Vestiarie presso gli Antichi. Folding engraved plate of shells by Francesco Rosaspina. xx, 387, [1] pages. Together, 2 volumes. 12mo, 164x96 mm, contemporary mottled calf, worn, crudely rebacked, contents toned, with scattered dampstains; and 4to, 225x154 mm, contemporary 1/2 sheep, top of spine worn, opening leaves spotted, 2 gatherings loose. Signature of the Irish chemist Peter Woulfe (1727-1803) and (his?) armorial bookplate in the first work. Paris: widow Pissot et al., 1750; Modena: (Stamperia Ducale), 1286 [i. e., 1786]