1914] on The Stars around the North Pole 



Table II. — Number of Stars of Different Velocities. 



123 



all shown in their proper motions. The diagram (taken from a paper 

 by Mr. Jones — Monthly Notices of the E.A.S., vol. Ixxiv, p. 196), ex- 

 hibits the proper motions of some of the brighter stars situated near 

 the North Pole. If the stars had all been placed at 0, thej would in 

 a century have spread out as shown in the diagram. 



180' 



Fig. 2. — Proper Motions of Group A5-F9. 



This spreading out has been caused by : — 



(«) The solar motion, which has shifted the centre of gravity of 

 the swarm towards 180°. 



{b) The peculiar motions of the stars themselves, which have 

 spread them out in the directions towards 90° and 270°. 



(c) The streaming in the direction 0° to 180° combined with the 



