Collection of scientific treatises with an emphasis on mathematical demonstration by the students of Adamus Adamandus (pseudonym of Adam Kochánski) at the Collegio Florentino, the Jesuit college in Florence. The third treatise, on underwater navigation, is described as a demonstration by Antonio Maria Salvini, a student at the Collegio from 1665 to 1669. Other treatises address fluid mechanics, perpetual motion, the possibility of human flight with mechanical wings, communication over distance with telescopes and lanterns, improvements in mechanical timekeeping, and the geometry of cross forms (Proposition II, given in f. 76r-79r, is also present on f. 62r-64r in slightly different wording and without diagrams, with a note on the repetition at the top of f. 62r).