1. Differential rotation, meridional and random motions of the solar Ca⁺ network

   • E. H. Schröter
   • H. Wöhl

   OriginalPaper Pages: 3 - 16

2. Isotopes of samarium in the sun

   • A. Ekeland
   • Ø. Hauge

   OriginalPaper Pages: 17 - 20

3. Magnetoactive lines in the medium with the velocity gradient

   • V. M. Grigorjev
   • J. M. Katz

   OriginalPaper Pages: 21 - 35

4. Observation of the absolute intensity of the Sun in the vacuum ultraviolet region

   • Keizo Nishi

   OriginalPaper Pages: 37 - 42

5. Supplementary remarks to ‘on the average depth of formation of weak fraunhofer lines’ by E. Gurtovenko, V. Ratnikova and C. De Jager

   • E. A. Gurtovenko
   • V. A. Ratnikova

   Research Note Pages: 43 - 45

6. Height of helium emission in the chromosphere

   • Thomas Pope
   • Stephen A. Schoolman

   OriginalPaper Pages: 47 - 51

7. Interpretation of Hα contrast profiles of chromospheric fine structures

   • L. E. Cram

   OriginalPaper Pages: 53 - 66

8. On the spicular density enhancement in the region of formation

   • S. K. Sahai
   • R. J. Bessey

   Research Note Pages: 67 - 70

9. Emission of helium in prominences and the chromosphere

   • N. N. Morozhenko

   OriginalPaper Pages: 71 - 78

10. A model of the supergranulation network and of active-region plages

    • J. O. Stenflo

    OriginalPaper Pages: 79 - 105

11. On the turbulent decay of strong magnetic fields and the development of sunspot areas

    • F. Krause
    • G. Rüdiger

    OriginalPaper Pages: 107 - 119

12. Comments on the course of solar activity during the declining phase of solar cycle 20 (1970–74)

    • H. W. Dodson
    • E. R. Hedeman

    OriginalPaper Pages: 121 - 130

13. Observation of a non-uniform component in the distribution of coronal bright points

    • L. Golub
    • A. S. Krieger
    • G. S. Vaiana

    Research Note Pages: 131 - 134

14. The structure and evolution of coronal holes

    • A. F. Timothy
    • A. S. Krieger
    • G. S. Vaiana

    OriginalPaper Pages: 135 - 156

15. A coronal hole observed at 10.7 GHz with a large single dish

    • E. Fürst
    • W. Hirth

    OriginalPaper Pages: 157 - 161

16. The large coronal transient of 10 June 1973

    • E. Hildner
    • J. T. Gosling
    • C. L. Ross

    OriginalPaper Pages: 163 - 177

17. Radio evidence for an expanding magnetic arch beyond 20 solar radii

    • R. G. Stone
    • Joseph Fainberg

    Research Note Pages: 179 - 181

18. The analysis of a high resolution X-ray spectrum of a solar active region

    • John H. Parkinson

    OriginalPaper Pages: 183 - 207

19. The X-ray line and continuum emission from a solar active region

    • P. B. Landecker
    • R. S. Wolff

    OriginalPaper Pages: 209 - 214

20. Changes of the Hα fibril pattern during solar flares

    • A. Bruzek

    Research Note Pages: 215 - 217

21. Anisotropy and polarization of solar X-ray bursts

    • J. C. Henoux

    OriginalPaper Pages: 219 - 233

22. X-ray heating of a low-temperature region in chromospheric flares

    • B. V. Somov

    OriginalPaper Pages: 235 - 246

23. Type III solar radio bursts and the fundamental-harmonic hypothesis

    • Hans Rosenberg

    OriginalPaper Pages: 247 - 257

24. On the possibility of deducing interplanetary and solar parameters from geomagnetic records

    • C. T. Russell

    OriginalPaper Pages: 259 - 269

25. Abstracts of forthcoming papers

    Abstract Pages: 271 - 275