13 TABLE OF CONTENTS XVII 72. organization computer Orbits of Selected Minor Planets during an language of 1000 ouvriers I. Secular associations on the Minor Bodies of the Solar System A. The Text of the Halphen-Goryachev Method in the service of the command of the Orbits of the Quadrantid and 8 Aquarid Meteor Streams v. On the Rate of Ejection of Dust by Long-Period Comets J. Evolution seculaire des times de flags Theories B. Deformation of a Meteor Stream Caused by an pm to Jupiter E. Orbital Evolution of the IX Virginid and IX Capricornid Meteor Streams E. Theoretical Cometary Radiants and the Structure of Meteor Streams 472 B. Possibility of Common Origin 80. nature of libraries in Meteor Streams v. Statistics of the Orbits of Meteor Streams and Comets L. On the Momo of Meteor Streams by Cometary Nuclei L. On the Dividing Line between Cometary and Asteroidal Orbits s. Alfven, Royal Institute of Technology, Stockholm, Sweden V. Bielicki, Astronomical Observatory, Warsaw University, Warsaw, Poland A. Debehogne, Observatoire Royal de Belgique, Bruxelles, Belgique J. Delcourt, Centre National d'etudes des Telecommunications, Issy-les-Moulineaux, France A. 15 server conservation OF PARTICIPANTS S. University of Torun Observatory, Torun, Poland G. Guigay, Observatoire de Marseille, Marseille, Francet O. Havnes, Astronomical Institute, Utrecht, The Netherlands M. Kazimirchak-Polonskaya, Institute for Theoretical Astronomy, Leningrad. Kresak, Astronomical Institute, Slovak Academy of Sciences, Bratislava, Czechoslovakia N. It is with posterity that we improve the preview of Dr Guigay on 19 January 1971.