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

1917 β (Schaumasse) observed at the Royal Observatory, Greenwich

1917-2008: A Space Optimist

1918 April 10 geophysical discussion

1918 April 12 meeting of the Royal Astronomical Society