The Rev. Dr. Robinson on the Constant of Refraction. 



221 



23 X <^R = - 2,2". M 

 K = 9.8637 



dfi : 



: - 1".41 



— 0'M42 



Fomalhaut. 



* 8 = -30° 31'. 15".26. (H. J.) 



Precession = + 19".073 ; sec var. = + 0".13.5 ; proper motion = — 0".180. 



