1. In memoriam

   • Zdeněk Kopal

   Announcement Pages: i - 266

2. A Razin-Tsytovich effect for bremsstrahlung

   • D. B. Melrose

   OriginalPaper Pages: 267 - 272

3. Contributions to the kinematics of type I tails of comets

   • Karl Wurm
   • Augusto Mammano

   OriginalPaper Pages: 273 - 286

4. Tidal evolution in close binary systems, II

   • Zdeněk Kopal

   OriginalPaper Pages: 287 - 305

5. Charged particle thermonuclear reactions in nucleosynthesis

   • J. W. Truran

   OriginalPaper Pages: 306 - 323

6. Observations spectroscopiques de HD 50138

   • Yvette Andrillat
   • Léo Houziaux

   OriginalPaper Pages: 324 - 328

7. Chemical composition of the interstellar gas: X-ray determinations

   • Robert L. Brown

   OriginalPaper Pages: 329 - 333

8. A cocoon model for thermal X-ray sources and ‘Oscillars’

   • Krishna M. V. Apparao

   OriginalPaper Pages: 334 - 336

9. Orientation of interstellar and interplanetary grains

   • A. Z. Dolginov

   OriginalPaper Pages: 337 - 349

10. Improvement of photomultiplier performance in astronomical applications

    • Michael Andrew Dopita

    OriginalPaper Pages: 350 - 362

11. Combined-Operations method for diffuse reflection by an isotropic, non-coherent scattering homogeneous sphere

    • T. H. Kho
    • K. K. Sen

    OriginalPaper Pages: 363 - 376

12. Non-linear compton and inverse compton effect

    • P. Stewart

    OriginalPaper Pages: 377 - 386

13. An estimate of the energy spectrum of gamma rays from the central region of the Galaxy and some implications

    • K. C. Anand
    • S. A. Stephens

    OriginalPaper Pages: 387 - 402

14. Some limits on cosmic-ray heating ofHI clouds by magnetic stars

    • B. N. G. Guthrie

    OriginalPaper Pages: 403 - 407

15. Energy spectrum and time variations of hard X-rays from Cyg X-1

    • P. C. Agrawal
    • G. S. Gokhale
    • B. V. Sreekantan

    OriginalPaper Pages: 408 - 424

16. Origin of stellar magnetic fields

    • Probhas Raychaudhuri

    OriginalPaper Pages: 425 - 436

17. Post-newtonian equilibrium configurations of rotating polytropes

    • M. J. Miketinac
    • R. J. Barton

    OriginalPaper Pages: 437 - 448

18. Predictions of exceptionally strong ‘4430’ in the backscattered light from reflection nebulae

    • Gordon E. Bromage

    OriginalPaper Pages: 449 - 461

19. Diffuse cosmic gamma rays observed at an equatorial balloon altitude

    • R. R. Daniel
    • George Joseph
    • P. J. Lavakare

    OriginalPaper Pages: 462 - 467

20. Statistical significance of some optical evidence for the bending of the galactic plane

    • D. Sher

    OriginalPaper Pages: 468 - 471

21. Time variations of hard X-rays from Sco X-1

    • M. Matsuoka
    • M. Fujii
    • B. V. Sreekantan

    OriginalPaper Pages: 472 - 490

22. The motion of dust and gas in the heads of comets with type II tails

    • Karl Wurm
    • Augusto Mammano

    OriginalPaper Pages: 491 - 503

23. Infall of gas from intergalactic space and soft x-ray background

    • Makoto Tosa
    • Takako Kato

    OriginalPaper Pages: 504 - 513

24. Abstracts of forthcoming papers

    Abstract Pages: 514 - 519