Published online by Cambridge University Press: 15 September 2014
In a previous paper the hypothesis propounded by Kapteyn that the stars are moving in two streams was examined by considering the proper motions of stars which were moving more than 20″ a century. By a graphical method the directions of these two streams were found with results in fair agreement with those found by Kapteyn and Eddington by other methods and with different material. It was evident from that paper that it would be possible in a large percentage of cases to say with tolerable certainty to which stream individual stars of large proper motion belonged.
page 376 note * Proc. Royal Soc. Edin., vol. xxviii. pp. 231–238.
page 387 note * As a p.m. of >99½″ is called 100″, the limits 100″, 60″, etc. are more strictly 99½″ 59½″, etc.