(30 cm), 14 pp. 60 items; priced (reproduced from typescript). Coil binding. - Numerous prints in this group feature the red or black Colonna inkstamp on verso (lower right corner). Included (item 40) is an impression dated 1768 of the Seconda macchina per la Chinea con un ‘Edificio per divertimenti pubblici’, designed by Paolo Posi, drawn by Giuseppe Palazzi, and engraved by Giuseppe Vasi. The displays in 1768 were cancelled at the last moment (27 June). The bulk of the prints were given to pyrotechnicians in 1770 and very few impressions of the 1768 Seconda macchina are recorded (just two are known to the writer: Danske Kunstindustrimuseet Bibliothek, Copenhagen, iii 180; Gabinetto Comunale delle Stampe, Rome, 729, 971). In 1769, the matrices were restruck with the caption dates changed from 1768 to 1769. Scalabroni (1981, no. 352 bis), Gori Sassoli (1994, no. 86), and La Festa a Roma (1997, ii, pp.183, 196) reproduce impressions dated 1769 in the matrice.