1926 October 27 meeting of the British Astronomical Association

1927 April 20 meeting of the Royal Meteorological Society

1927 April 27 meeting of the British Astronomical Association

1927 April 8 meeting of the Royal Astronomical Society

1927 December 14 meeting of the Royal Meteorological Society

1927 December 2 geophysical discussion

1927 December 28 meeting of the British Astronomical Association

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