Proper motions of 1186 Carrington Stars from a direct comparison between Carrington's Catalogue for 1855 and the Greenwich Second Nine-year Catalogue for 1900.

(Communicated by the Astronomer Royal.)

The proper motions of the following stars, which have been observed with the transit circle at Greenwich during the years 1897-1905, for the purpose of determining their places for use as reference stars on the astrographic plates, have been derived from a direct comparison with Carrington's Circumpolar Catalogue for 1855. For this purpose the places in Carrington's Catalogue have been reduced to the epoch 1900 by the ordinary trigonometrical formula with the Struve-Peters' constants, and in addition the systematic corrections given on p. 321 of Monthly Notices, lxvi. 5, have been applied.

Full details will be published in the Introduction to the Greenwich Nine-year Catalogue, 1900. The proper motions for both R.A. and N.P.D. are given in arc, and arranged in Zones of N.P.D.; the magnitudes are taken from the Harvard Photometry (marked *) and the Bonn Durchmusterung.