1917 December 5 geophysical discussion

1917 December 5 meeting of the British Astronomical Association

1917 February 21 meeting of the Royal Meteorological Society

1917 February 28 meeting of the British Astronomical Association

1917 February 9 meeting of the Royal Astronomical Society

1917 January 12 meeting of the Royal Astronomical Society

1917 January 17 meeting of the Royal Meteorological Society

1917 January 31 meeting of the British Astronomical Association

1917 June 20 meeting of the Royal Meteorological Society

1917 June 27 meeting of the British Astronomical Association

1917 June 8 meeting of the Royal Astronomical Society

1917 March 21 meeting of the Royal Meteorological Society

1917 March 28 meeting of the British Astronomical Association

1917 March 9 meeting of the Royal Astronomical Society

1917 May 11 meeting of the Royal Astronomical Society

1917 May 16 meeting of the Royal Meteorological Society

1917 May 30 meeting of the British Astronomical Association

1917 November 21 meeting of the Royal Meteorological Society

1917 November 9 meeting of the Royal Astronomical Society

1917 October 31 meeting of the British Astronomical Association