1. Editorial

   • Zdeněk Kopal

   EditorialNotes Pages: 3 - 3

2. The relative energy spectra of carbon and oxygen nuclei in the primary cosmic radiation

   • T. T. Von Rosenvinge
   • W. R. Webber
   • J. F. Ormes

   OriginalPaper Pages: 4 - 13

3. Evolution of close binaries and origin of Algol-type systems

   • J. Ziółkowski

   OriginalPaper Pages: 14 - 30

4. Dynamics of close binary systems with mass exchange

   • John D. Hadjidemetriou

   OriginalPaper Pages: 31 - 45

5. Behaviour of the Cepheid variables in the colour-colour diagram

   • N. Nikolov
   • P. Kunchev

   OriginalPaper Pages: 46 - 55

6. A morphological classification of e and SO galaxies in terms of equilibrium isopleths

   • Dominic G. B. Edelen

   OriginalPaper Pages: 56 - 76

7. Variability of the metallic-line star 28 Andromedae

   • Shiro Nishimura

   OriginalPaper Pages: 77 - 79

8. Measurements of cosmic-ray Li, Be and B nuclei in the energy range 100 MeV/nuc to >22 BeV/nuc

   • T. T. Von Rosenvinge
   • J. F. Ormes
   • W. R. Webber

   OriginalPaper Pages: 80 - 101

9. Tentative identification of the diffuse interstellar absorption bands and of a diffuse interstellar doublet line

   • Mogens Rudkjøbing

   OriginalPaper Pages: 102 - 108

10. The Wolf-Rayet stars and mass loss

    • Anne B. Underhill

    OriginalPaper Pages: 109 - 116

11. Rocket observations of mass loss from hot stars

    • Donald C. Morton

    OriginalPaper Pages: 117 - 122

12. Possibility of mass loss in the red-giant stage from H-R diagrams of galactic clusters

    • G. Barbaro
    • N. Dallaporta
    • G. Fabris

    OriginalPaper Pages: 123 - 138

13. Solar-wind model including the effects of rotation, magnetic fields, and anisotropic heat conduction

    • S. Grzędzielski

    OriginalPaper Pages: 139 - 149

14. Mass loss from coronae and its effect upon stellar rotation

    • Kyoji Nariai

    OriginalPaper Pages: 150 - 159

15. Coronae around helium stars and X-ray sources

    • Kyoji Nariai

    OriginalPaper Pages: 160 - 162

16. Spectroscopic study of the eclipsing system R canis majoris

    • Masatoshi Kitamura

    OriginalPaper Pages: 163 - 174

17. Evolution through mass exchange in close binary systems of total mass 2.5M _⊙

    • S. Refsdal
    • A. Weigert

    OriginalPaper Pages: 175 - 178

18. Some problems concerning gas flows in close binary systems of dwarf stars

    • V. G. Gorbatzky

    OriginalPaper Pages: 179 - 181

19. A mechanism for the production of planetary nebulae

    • G. S. Kutter
    • M. P. Savedoff
    • D. W. Schuerman

    OriginalPaper Pages: 182 - 197

20. Photoelectric observations of CH Cygni during the explosive phases of 1967–68

    • Bruno Cester

    OriginalPaper Pages: 198 - 204

21. Spectroscopic evidence for mass loss from CH Cygni

    • R. Faraggiana
    • M. Hack

    OriginalPaper Pages: 205 - 213

22. Abstracts of forthcoming papers

    Abstract Pages: 214 - 216