Trattato della sfera di Galileo Galilei, con alcune prattiche intorno à quella, e modo di fare la figura celeste, e suoi direttioni, secondo la via rationale
A 1656 Roman treatise on spherical astronomy, printed by Nicolo Angelo Tinassi and attributed to Urbano d'Aviso, presenting Galileo's sphere and methods for drawing a celestial figure. The pictures are small letterpress geometric diagrams with lettered points around a circle, plus plain printer's ornaments and a laurel-wreathed initial, all in brown ink on cream paper. A designer could draw on the compass-and-circle diagrams for precise linework and the ornaments for vignette and headpiece motifs.
