1928 June 27 meeting of the British Astronomical Association

1928 June 8 meeting of the Royal Astronomical Society

1928 March 2 geophysical discussion

1928 March 21 meeting of the Royal Meteorological Society

1928 March 28 meeting of the British Astronomical Association

1928 March 9 meeting of the Royal Astronomical Society

1928 May 11 meeting of the Royal Astronomical Society

1928 May 16 meeting of the Royal Meteorological Society

1928 May 30 meeting of the British Astronomical Association

1928 May 4 geophysical discussion

1928 November 16 geophysical discussion

1928 November 21 meeting of the Royal Meteorological Society

1928 November 28 meeting of the British Astronomical Association

1928 November 9 meeting of the Royal Astronomical Society

1928 October 31 meeting of the British Astronomical Association

1929 April 12 meeting of the Royal Astronomical Society

1929 April 17 meeting of the Royal Meteorological Society

1929 April 24 meeting of the British Astronomical Association

1929 December 13 meeting of the Royal Astronomical Society

1929 December 18 meeting of the Royal Meteorological Society