GREAT REFRACTING TELESCOPE AT ELCHIES, IN MORAYSHIRE. 



409 









7 BELFIUNI— (continued). 







Com- 

 ponents. 



Mag- 

 nitude. 



Colour. 





Position. 



Distance. 



Date. 



Authority. 



A 

















B 









AB 273 20 



12-02 



1830-57 



Dawes. 



A 





Goldeu 













B 





Bluish Green 





AB 273 45 



AB 272 53(tc/28) 



11-90 

 12-016 (w 28) 



1830-89 

 1830-89 



2. 



A 

 B 







Bessel. 



A 

 B 









AB 273 7{w 24) 



12-045 (w 24) 



1834-76 



Bessel. 



A 



4 



Yellow 













B 



7 



Light emerald . . 





AB 273 18 (w 8) 



11-8 (iu7) 



1839-71 



Cycle. 



A 

 B 









AB 272 48{iu4:0) 



11-943 (w40) 



1842-63 



Schliiter. 



A 

 B 



... 



Orange 



Yellow 



:::: 







1844-45 



Sestini. 



A 

 B 



... 



Golden yellow .. 

 Flushed grey 









1850-7 



Spec. Hart. 



A 

 B 









AB 272 55 (w 4) 



11-530 (iu4) 



1853-83 



Peters. 



A 

 B 



... 







AB 273 8(io20) 



11-521 (m/20) 



1856-52 



Luthers. 



A 

 B 



... 



Cadmium yellow (1) 

 Greenish tinge (1).. 







1856-68 



Alta Vista. 



A 



3-4 















B 



4-9 







AB 272 5(i(;30) 



11-806 (w 22) 



1861-07 

 1861-38 



vAuwers. 



A 

 B 



4-5 (2) Pale yellow (2).. 

 7 (2) Sliglitly greenish 



'(i) 



AB 272 45 (lu 1) 



11-15 (it;0-3) 



1862-72 



Elchies. 



In Magnitude, not quite constant. 



In Colour, both A and B seem to undergo yellow pulsations. 



In Position and Dista7ice, there is much still unsettled. Struve expressly says, 

 no alteration in angle : and the Cycle, decides on " fixity." But Dr A. Auwers 

 claims a small decrease of distance ; and I think that he is not only right there 

 (though the Elchies observation is probably a very bad one), but that the same 

 change has been taking place in Position. In the British Association Catalogue, 

 proper motions to a considerable extent, and nearly in the same direction, are attri- 

 buted to either star ; this looks like a binary connection, and if the difference of 

 those proper motions is not exactly borne out by the Positions and Distances 

 observed, we can at least say, that the whole proper motion of one most assuredly 



