Journal of the British Astronomical Association. Vol.49 No.6
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- 45BAA Journal Vol.49 No.6 April 1939
- 88CONTENTS
- 49REPORT OF THE ORDINARY GENERAL MEETING OF THE ASSOCIATION Held on Wednesday, 1939 March 29
- 58PAPERS COMMUNICATED TO THE ASSOCIATION
- 58Argelander and the B.D.
- 66To Find the Parabolic Orbit of a Comet by a Graphical Method
- 72COMMUNICATIONS TO THE ASSOCIATION
- 72Speculum Working Fifty Years Ago
- 75Frequency Variations in Oscillation Clocks
- 76ASTRONOMICAL DIARY
- 78REVIEWS
- 78Tables of Addition and Subtraction Logarithms with Six Decimals." By Dr. B. Cohn
- 78Astronomy for the Benefit of Mankind." By J. D. Johnstone
- 79NOTES
- 79Comet Notes
- 80Correction of Meteor Radiants
- 81Two New Extra-Galactic Systems
- 82Newspaper Astronomy
- 82Newcastle-on-Tyne Astronomical Society
- 84NOTICES OF THE ASSOCIATION
- 84New Members of the Association Elected 1939 March 29
- 87FORTY-NINTH SESSION, 1938-39 OFFICERS AND COUNCIL
- 88CONTENTS