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The British Association for the Advancement of Science (BAAS) digital archive provides access to a wide range of materials of interest to those studying or researching the history of science and related disciplines. The BAAS collection documents the efforts of the British scientific community to establish science as a professional activity and make Britain into a globally competitive centre for science. Additional content is included from British universities including Leeds, Liverpool, UCL and Senate House, University of London. The materials cover the time period 1870 to 1930. Content includes letters, diaries, lecture notes, manuscripts, photographs, artworks and more. New content is regularly added to this digital archive.