1. Sydney Chapman (1888–1970)

   • Zdeněk Kopal

   Announcement Pages: 147 - 148

2. The Roche Coordinates in three dimensions and their application to problems of double-star astronomy

   • Zdeněk Kopal

   OriginalPaper Pages: 149 - 171

3. Light-element abundances of peculiar a stars

   • B. N. G. Guthrie

   OriginalPaper Pages: 172 - 184

4. Coherent radio emission from cosmic ray air-showers in the turbulent atmosphere

   • I. Lerche

   OriginalPaper Pages: 185 - 203

5. Comment on a paper of I. Lerche: Effect of interstellar density fluctuations on signal dispersion measure

   • K. Elsässer
   • P. Gräff

   OriginalPaper Pages: 204 - 206

6. Reply to the comments of K. Elsässer and P. Gräff

   • I. Lerche

   BriefCommunication Pages: 207 - 207

7. Physics of rotation

   • Gh. A. Marinescu

   OriginalPaper Pages: 208 - 221

8. Amplitude ratios of several groups of variable stars

   • Kam-Ching Leung

   OriginalPaper Pages: 222 - 226

9. Polarization of radiation from stellar atmospheres. The grey case

   • J. Patrick Harrington

   OriginalPaper Pages: 227 - 242

10. The symplectic property of matrizants

    • G. Katsiaris
    • C. L. Goudas

    OriginalPaper Pages: 243 - 250

11. Effect of scattered photons on the spectrum of diffuse X-rays observed at balloon altitude

    • F. Makino

    OriginalPaper Pages: 251 - 255

12. Critical parameters for supermassive objects in general relativity

    • A. Kovetz
    • G. Shaviv

    OriginalPaper Pages: 256 - 261

13. The spectrum of the manganese star ι Coronae Borealis

    • Lawrence H. Aller
    • John E. Ross

    OriginalPaper Pages: 262 - 266

14. The spectrum of the manganese-scandium star ϕ Herculis

    • Lawrence H. Aller
    • John E. Ross
    • R. Erik Zimmermann

    OriginalPaper Pages: 267 - 274

15. The spectra of some discrete radio sources in 10–5000 MHz frequency range

    • S. Ya. Braude
    • A. V. Megn
    • I. N. Zhouck

    OriginalPaper Pages: 275 - 322

16. Abstracts of forthcoming papers

    Abstract Pages: 323 - 323