DESSAU, BERNARDO (1863–1949), Italian experimental physicist. Born in Offenbach, Germany, Dessau became an Italian citizen. He was a member of the Italian Academy of Sciences and professor at the University of Perugia (1904). He acted as shoḥet for the small Perugia Jewish community. An active Zionist, he founded Il Vessillo Israelitico, the first Italian Zionist periodical. He wrote books on wireless telegraphy, physical and chemical properties of alloys, and physics.