Papers from the International Committee conference in Paris concerning fundamental stars, 1909.

Circular letter from the President of the International Committee on fundamental stars relating to the Paris conference, 1909, with subsequent correspondence.

Correspondence with Professor Lewis Boss regarding fundamental stars for the Paris Conference, 1909.

Correspondence, travel arrangements and minutes, 1911, concerning the conference in Paris of 23-28 October 1911.

Correspondence with member of the Sub-Committee on Screens, 1891, including M.M. Vogel and P. Harny on seven hole screens, Captain W. de W. Abney on developer and plates, A.A. Common and Captain Abney on the reproduction of negatives, the election of F.F. Tisserand to the Presidency, and miscellaneous correspondence with committee members.

Correspondence with members of the photographic committee, 1893-1900, concerning the meeting in Paris.

Correspondence, 1909, concerning the Conference in Paris on 19-24 April 1909 and Christie's inability to attend through illness.

Reports to the Photographic Committee, 1893-1894.