COMETS – MONTANARI, Geminiano (1633-1687). Cometes Bononiae observatus anno 1664 & 1665. Astronomicophysica dissertatio. Bologna: J.B. Ferroni, 1665. 4° (212 x 155mm). Engraved folding plate. (Variable insignificant spotting.) Modern pasteboard binding. [Sold with:] LICETI, Fortunio (1577-1657). De cometae an MDCLII. MDCLIII observationibus astronomicis, Europa fere tota peractis, et omnia sideris accidentia detegentibus. Udine: N. Schiratti, 1653. 4° (190 x 142mm), (Short marginal tear to a2, just into text but without loss, variable spotting and browning, heavy to gatherings F, P and Q.) Later vellum. Provenance: gist of the printer (ink inscription on recto of front free endpaper) -- Henricus Treus (ink inscription on verso of front free endpaper, in same hand as previous). [And:] GARULLI, Camillo. Hypothesis Copernicana, cometae, et elegiarum monobiblos. Rome: G. Salomon, 1777. 8° (183 x 122mm). Woodcut title device. (Variable, mostly light, spotting.) Contemporary half calf over decorative boards (extremities rubbed, upper joint cracking at tail). Provenance: early Latin inscription on title. TWO RARE 17TH-CENTURY OBSERVATIONS OF COMETS, together with Garulli's scarce work in verse. This latter comprises three poems, the first two on Copernican astronomy and comets, while the final section is on a mixture of themes including verse on physics and about Bishop Spinucci.