Vol. 2 contains parts II and III: "A catalogue of diseases distributed into natural classes according to their proximate causes, with their subsequent orders, genera, and species, and with their methods of cure" (p. [iii]-xi and [1]-653); "The articles of the materia medica, with an account of the operation of medicines" (p. [655]-772) "Sect. XL. On the ocular spectra of light and colours, by Dr. R. W. Darwin ... from the Philosophical transactions, vol. LXXVI [1786] p. 313": v. 1, p. 534-566 "Additions": v. 1, p. [566]-575; v. 2, p. [626]-640 "Directions to the binder," "Errata," and "Advertisement [announcement of v. 2]": v. 1, p. [587-588] Bound in original full speckled calf over wooden boards, rebacked in 20th c. morocco with gilt title to spine ; speckled edges ; original endpapers preserved ; bookplate with motto "Fide et Taciturnitate" (Marcus Inish[?]) inside front cover