1927 November 16 meeting of the Royal Meteorological Society

1927 November 2 geophysical discussion

1927 November 30 meeting of the British Astronomical Association

1927 October 26 meeting of the British Astronomical Association

1927 October 7 geophysical discussion

1928 April 13 meeting of the Royal Astronomical Society

1928 April 18 meeting of the Royal Meteorological Society

1928 April 28 meeting of the British Astronomical Association

1928 December 14 meeting of the Royal Astronomical Society

1928 December 19 meeting of the Royal Meteorological Society

1928 December 7 geophysical discussion

1928 February 10 meeting of the Royal Astronomical Society

1928 February 15 meeting of the Royal Meteorological Society

1928 February 29 meeting of the British Astronomical Association

1928 February 3 geophysical discussion

1928 January 13 meeting of the Royal Astronomical Society

1928 January 16 meeting of the Royal Meteorological Society

1928 January 18 meeting of the Royal Meteorological Society

1928 January 25 meeting of the British Astronomical Association

1928 June 20 meeting of the Royal Meteorological Society