On 14 May members of the Pontifical Academy of Sciences paid a visit to the Vatican Observatory. On 10 June COYNE received Mr. Jürgen Oesterhelt, Ambassador of the Republic of Germany to the Holy See, and the embassy staff for a visit to the Observatory and the Papal Villas. In July COYNE hosted a visit by PETER LIKINS, president of the University of Arizona, Tucson, with a group of university alumni. In November MAFFEO hosted a working visit of the staff of the Vatican Radio to the Observatory. The Observatory hosted the meeting of the Associazione Tuscolana di Astronomia, 26-28 November, at Castel Gandolfo.

The following members of the diplomatic corps to the Holy See visited the Seventh Vatican Observatory Summer School: Mr. Marco César Meira Naslausky, Brazil; Mr. Bae Yang-Li, Korea; Mr. Marijan Sunjic, Croatia; Mr. Hermes Herrera Hernández, Cuba; Mr. Jürgen Oesterhelt, Germany; Mr. Nikolaos Kalantzianos, Greece; Mrs. Corinne C. Boggs, USA.

The following individuals paid extended working visits to the Observatory:

A. G. DAVIS PHILIP, Union College and Institute for Space Observations, Schenectady, New York, USA

ROBERT GARRISON, David Dunlap Observatory, University of Toronto, Ontario, Canada

RICHARD GRAY, Appalachian State University, North Carolina, USA

JOHN B. HEARNSHAW, University of Canterbury, Christchurch, New Zealand

ROBERT JANUSZ, S.J., Krakow, Poland

The following made occasional working visits to the Observatory:

GIANANDREA BIANCHINI, University of Padua, Italy

CLAUDIO CASACCI, Alenia Spazio, Turin, Italy

AJOY K. DASGUPTA, Institute of Astronomy, University of Rome "La Sapienza," Italy, and South Glamorgan Education Department, Cardiff, UK

PHILIPPE EENENS, University of Guanajuato, Guanajuato, Mexico

CRAIG FOLTZ, Multiple Mirror Telescope Observatory, Tucson, Arizona, USA

WILLIAM MERLINE, Southwest Research Institute, Arizona, USA

JOHN DAVID MOONEY, John David Mooney Studios, Chicago, Illinois, USA

REMO RUFFINI, Institute of Physics, University of Rome "La Sapienza," Italy

WESLEY SALMON, University of Pittsburgh, Pittsburgh, Pennsylvania, USA

MICHAEL SHERWIN, O.P., University of Notre Dame, South Bend, Indiana, USA

FILIPPO SMRIGLIO, Institute of Astronomy, University of Rome "La Sapienza," Italy

MARK SYKES, University of Arizona, Tucson, Arizona, USA

XIANG-PING WU, Beijing Astronomical Observatory, China

The following gave invited lectures at the Seventh Vatican Observatory Summer School:

EDWIN AGUIRRE and IMELDA JOSON, Sky and Telescope, Cambridge, Massachusetts, USA

CARL ALLEN, NASA Johnson Space Flight Center, Houston, Texas, USA

PETER L. BIERMANN, Max Planck Institute for Radioastronomy, Bonn, Germany

HENRY M. BLAIR, Chemical Detection Technology, Inc., Tucson, Arizona, USA

JOSÉ G. FUNES, S.J., University of Padua, Italy

DONALD RICHARDS, University of Virginia, Charlottesville, Virginia, USA

THOMAS WILSON, Submillimeter Telescope Observatory, University of Arizona, Tucson, Arizona, USA

Among other professional guests of the Observatory during the year were: GIOVANNI BIGNAMI, Agenzia Spaziale Italiana, Rome, Italy; PEDRO CARTAYA, Belen Observatory, Miami, Florida, USA; ROBERTO COLELLA, Purdue University, West Lafayette, Indiana, USA; STEFANO LAGOMARSINO, Ente Nazionale Energia Ambiente, Rome, Italy; MARIO SCANDIGLI, University of Milan, Italy.