1. Recent advances in the study of fossil tracks in meteorites due to heavy nuclei of the cosmic radiation

   • D. Lal

   OriginalPaper Pages: 623 - 650

2. Galactic effects of the cosmic-ray gas

   • E. N. Parker

   OriginalPaper Pages: 651 - 712

3. The heating of the solar corona

   • M. Kuperus

   OriginalPaper Pages: 713 - 739

4. Book reviews

   • C. de Jager
   • A. Ollongren
   • M. Tucker

   BookReview Pages: 740 - 742