1927 December 9 meeting of the Royal Astronomical Society

1927 February 11 meeting of the Royal Astronomical Society

1927 February 16 meeting of the Royal Meteorological Society

1927 February 18 geophysical discussion

1927 February 23 meeting of the British Astronomical Association

1927 January 14 meeting of the Royal Astronomical Society

1927 January 19 meeting of the Royal Meteorological Society

1927 January 26 meeting of the British Astronomical Association

1927 July 6 meeting of the British Astronomical Association

1927 June 10 meeting of the Royal Astronomical Society

1927 June 15 meeting of the Royal Meteorological Society

1927 March 11 meeting of the Royal Astronomical Society

1927 March 16 meeting of the Royal Meteorological Society

1927 March 30 meeting of the British Astronomical Association

1927 May 13 meeting of the Royal Astronomical Society

1927 May 18 meeting of the Royal Meteorological Society

1927 May 25 meeting of the British Astronomical Association

1927 May 6 geophysical discussion

1927 May 7 geophysical discussion

1927 November 11 meeting of the Royal Astronomical Society