The works of this period are Les Philosophes Salaries, Machiavel juge des revolutions de notre temps (1849), La Federazione repubblicana (1851), La Filosofia della rivoluzione (1851), L' Italia dopo it colpo di Stato (1852), Histoire des revolutions, ou Guelfes et Gibelins (1858; Italian trans., 1871-1873).
He also wrote his chief historical work, Lo Stato Romano dal 1815 al 1850, in four volumes (Turin, r850).
He is the author of many miscellaneous treatises on science, music, the art of teaching the deaf and dumb, &c. But his chief work, the labour of fully twenty years, is entitled Dell' origine, progressi, e stato attuale d'ogni Letteratura (7 vols., Parma, 1782-1799).
His work Dello stato fisico del suolo di Roma (1820), with its accompanying map, is likewise noteworthy.
When Italy did institute their National Police (Polizia di Stato), instead of replacing the Carabinieri they learned to work in conjunction with them.
