Following successful meetings in Manchester (1988), Toronto (1992), Edinburgh (1996), and St. Louis (2000), the British Society for the History of Science, the Canadian Society for the History and Philosophy of Science, and the History of Science Society will be holding their fifth international joint meeting in Halifax, Nova Scotia, 5-7 August 2004. The program committee invites proposals for sessions on the theme of Circulating Knowledge: http://www.unh.edu/history/golinski/Halifax1.htm.