He published in 1551 Regola generale per sollevare ogni affondata nave, intitolata la Travagliata Invenzione (an allusion to his personal troubles at Brescia), setting forth a method for raising sunken ships, and describing the diving-bell, then little known in western Europe.
His Storia critica di Spagna e della cultura spagnuola in ogni genere (2 vols., 1781-1784) was finally expanded into the Historia critica de Espana y de la cultura espanola (1783-1805), which, though it consists of twenty volumes, was left unfinished; had it been continued on the same scale, the work would have consisted of fifty volumes.
His principal works, generally published under the assumed name of "Agatopisto Cromazione," are on the history of philosophy: - Della Istoria e delle Indole di ogni Filosofia, 7 vols., 1772 seq.; and Della Restaurazione di ogni Filosofia ne' Secoli, xvi., xvii., xviii., 3 vols., 1789 (German trans.
His whole nature was summed up in the lines of his favourite poet: "Luce intellettual, piena d'amore, Amor di vero ben, pien di letizia, Letizia the trascende ogni dolzore."