Published for nearly five decades from October 1929 as part of a so-called "New Series," the Boletim da Academia das Ciências de Lisboa [Bulletin of the Lisbon Academy of Sciences] enjoyed remarkable longevity and regularity, spanning three distinct political regimes: the Military Dictatorship, the Estado Novo [New State], and the early years of the Third Republic. It served as the official organ of the Academia das Ciências de Lisboa [Lisbon Academy of Sciences] (ACL) during this long period, replacing the Boletim da Segunda Classe: actas e pareceres , estudos , documentos e notícias [Bulletin of the Second Class: Minutes and Opinions, Studies, Documents, and News] (published from 1902 to 1929) and the Jornal de Ciências Matemáticas , Físicas e Naturais … [Journal of Mathematical, Physical and Natural Sciences] (three series, 1866-1929, José Alberto Silva, A Academia Real das Ciências (1779-1834)… , p. 17, no. 27). In its early years, the Boletim was managed by an editorial board initially composed of six members, including António Baião, António Pereira Forjaz , and Joaquim Leitão. Over time, the publication had two principal directors: Joaquim Leitão (from January 1934 until his death in May–August 1956) and António Pereira Forjaz (from October–December 1956 to 1964). No director was identified between 1965 and 1977. Joaquim Leitão was a journalist, the director of several periodicals, and a prolific author of novels, plays, translations, and historical studies. His work included studies on King Carlos, King Manuel II, the Revolution of 5 October, and literary evocations of figures such as Eça de Queirós, Camilo Castelo Branco, and Júlio Dantas. His style was erudite and ornate, reminiscent of Rocha Martins. António Pereira Forjaz , in contrast, held a doctorate in science from the University of Lisbon, where he later became director of the Faculty of Sciences. He also earned a degree in secondary teaching from the Faculdade de Letras [Faculty of Arts and Humanities] in Lisbon and taught chemistry at Liceu Passos Manuel [Passos Manuel High School]. Additionally, he served as a member of the Junta de Educação Nacional [National Education Board].

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