[UNIVERSITY]. Saggio di Aritmetica universale dedicated to His Most Serene Highness F. Emmanuele de Rohan. Malta: Mallia, 1780. Apparently unique copy, unrecorded in public libraries or bibliographies, of this mathematical essay written by four students of the University of Malta; Salvatore Psalia, Giovanni Zammit, Vincenzo Marchesi, and Giuseppe Guido; as an academic exercise. The work bears witness to the scientific activity of the Maltese university in the modern age. 4to (200 x 150mm). 20 pages, woodcut arms of Malta to title-page, engraved initials, mathematical notation. Contemporary floral paper wrappers. (1)