[ASTRONOMY]. PONTANUS, JOHANNES JOVIANUS. Quae in hoc enchyridio contineantur. Florence: P. de Giunta, 1514. 8vo, vellum; title-page repaired, old ink notation on title, minor browning and staining. Adams P1870 -- MARTELLI, UGOLINO. La Chiave del Calendario Gregoriano... Lyon: [Francois Conrad], 1583. 8vo, contemporary vellum; old ink notations on title (erased), light browning and staining. STC French 303 -- HEERBRAND, JACOB. Disputation, de adiaphoris, et calendario Gregoriano. Tübingen, 1584. 4to, wrappers; light browning and staining, marginal repair to title and last page. Adams H126; STC German p. 386 -- BERTHOUD, FERDINAND. Mémoire sur le Travail des Horloges et des Montres a Longitudes. Paris, 1792. 4to, rebound in boards; light staining and browning -- [With]: CASTELLI, CARLO. L'Arte di Filare la Seta a Freddo Ossia senza Fuoco sotto le Bacine delle Filatrici. Venice, 1795. Folding table. 8vo, contemporary wrappers. (5)