Meyer (Cornelius) L'Arte di restituire à Roma la tralasciata Navigatione del suo Tevere, 3 parts in one, additional engraved title present in 2 states, letterpress title with woodcut ornament, 68 engraved illustrations & maps including 6 double-page, woodcut decorations and initials, one bifolium browned, light damp-stain to head of titles and dedication leaf, otherwise very good, Rome, Lazzari Varese, 1685; Nuovi Ritrovamenti..., 2 parts in one, title with engraved vignette, 49 engraved illustrations including 5 double-page, engraved bookplate bearing Odescalchi family coat-of-arms by Michelassi on front pastedown, small worm-tracks affecting upper margin throughout, Rome, Gio. Giacomo Komarek Boëmo, 1696, each vol. inscribed by the author 'ex dono authoris' on front pastedown and front fly-leaf respectively, uniformly bound in coeval vellum, some wear to feet of spines, folio (2) The first volume is a treatise on hydrology in which Meyer considers several technical solutions to the problems of navigating the Tiber. The second volume, Nuovi ritrovamenti, is a collection of various treatises on experiments, discoveries, technologies and natural phenomena, including the eclipse of Jupiter's first satellite, the sun and the Earth, and the comet that appeared in 1680, 1682 and 1684.

***An excellent pair of works, scarce complete thus and in such good condition, and particularly interesting for the association. The first work has a printed dedication to the then Pope, Blessed Pope Innocent XI, Benedetto Odescalchi, so it is probable considering the presence of the Odescalchi bookplate that both these volumes were presented to him directly, inscribed by the author..