206 



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



l8Xt^R = — 36".35 6?R=— 2".02 



K=: 6.2821 «?/*=— 0.321 



V Persei. 



Twelve observations (1838. 416) give, 



8 = -f 42° 2' 2". 57. 



Precession = -\- 11.954 ; sec var. = — 0.471 ; proper motion = — 0.004. 



7 X «?K = — 14".64 

 K = 6.5578 



dR — — 2".09 

 dfi=— 0.326 



