This Conference, organized by the Comit6 International pour l'Etude des Argiles (CIPEA) and sponsored by the International Union of Geological Sciences, was attended by some 200 clay mineralogists from 23 countries. The British Clay Minerals Group was well represented, having 17 participants.

The Conference arrangements were very efficierxtly made by Professor I.Th. Rosenqvist and Dr. P. Graff-Petersen, President and Secretary of CIPEA, together with an Organizing Committee appointed by the Swedish Society for Clay Research, who were the official hosts.