Warsaw: Georgi Dimitrov, the prime minister of Bulgaria, visits Poland; the signing of the Polish-Bulgarian friendship treaty. The construction of the W-Z Route by members of the “Service to Poland” organization. Czech barges sail along the Oder River to Szczecin. An invasion of the forest pest named Acantholyda stellata in Poland. Warsaw: French actor Louis Jouvet and his troupe perform Molière’s “The School for Wives”.