COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2391 Konkoly Observatory Budapest 25 August 1983 HU ISSN 0374 - 0676 ANNOUNCEMENT CEPHEID COLLOQUIUM The David Dunlap Observatory, University of Toronto, will host a three - or four-day colloquium on all aspects of cepheid variables (theory and observation, both stellar populations) in mid-1984. Application has been made for this to be an official IAU Colloquium, celebrating the 200th anniversary of the discovery of cepheid variables. It is open to all interested persons. If it receives IAU sponsorship a small amount of travel money may be available to selected participants at the discretion of the Scientific Organizing Committee, but awards will not be decided before March, 1984. TITLE: Cepheids: Theory and Observation. DATES: May 29, 30, 31, June 1, 1984. PLACE: University of Toronto, Toronto, Canada. The program will include review papers, 10-minute contributed papers, and poster presentations. It is our intention to publish the proceedings. The deadline for the receipt of abstracts is May 1, 1984, but participants wishing to give papers should write to J.D. Fernie (address below) as soon as possible, indicating their approximate topic and any strong preference for oral- or poster-presentation. Choices, however, cannot be guaranteed. There will be a registration fee of $60. Available accommodation will range from university dormitory rooms to luxury hotels at rates from about $25 per day up. Further details will be available later from J.R. Percy (address below). J.D. FERNIE J.R. PERCY David Dunlap Observatory Department of Astronomy Box 360 University of Toronto Richmond Hill, Ontario Toronto, Ontario Canada L4C 4Y6 Canada M5S 1A7