1 “... and Chemistry of Atmospheres' which was held at the University of Liege, Belgium, during the period July 29...”

2

3 “... the courses representing the following countries: Austria (2), Belgium (1), Denmark (1), France (12), Germany...”

4 “... to Professor P. Swings, the Director of the Astrophysical Institute of the University of Liege, Belgium...”

5 “..., Belgium and fifteen from Japan. The topics covered were: (1) The Critical Velocity (2) Beam Plasma...”