At head of title: Acad´emie Royale de Belgique 1899- None published 1915-18 1932-69 have title in French and Dutch 색인: Indexes: Ser.4, 1899-1910. 1 v.; ser.5, 1911-1914. 1 v.; ser.5, 1911-1969. 1 v. Previous to 1899 the bulletins of the three classes of the Academy were published in one series entitled: "Bulletins de l'Acad'emie." In 1899 they were divided into two series, entitled respectively "Bulletins de la Classe des sciences," and "Bulletins de la Classe des lettres et des sciences morales et politiques et de la Classe des Beaux-arts. Semiannual