64 leaves, 8vo (202 x 135 mm). In Italian.  Written in cursive in brown ink on thick paper. With several ink diagrams, tables, head- and tail-pieces throughout. (Some offsetting and a few stains.) 18th-century sprinkled calf gilt (some staining and repairs). 

 

Text opens: “La Sfera che si spieghera si divide in Naturale et Artificiale; la Naturale compre de tutto l’Universo l’Artificiale e un instrument fatto dall’arte comprendere La Sfera Naturale, e composta de diversi circoli.” Describing the terrestrial sphere, time, signs of the zodiac, the movements of the heavens, the cycles of the moon, and presenting propositions, experiments, and corollaries.