The Rev. Dr. Robinson on the Constant 0/ Refraction. 209 



58 Persei. 

 Eight observations (1837. 198) give, 

 8 = 4- 40° 54' 24". 32. 

 Precession = + 8".07l ; sec var. = — 0".329 ; proper motion = — 0".035. 



6xdR = — 10".73 

 K = 7.8566 



d&= — l".79 

 dn—— 0.228 



58 Cygni. 



Twelve observations (1838. 024) give, 



8= + 40° 30' 58". 86. 



Precession = + 13". 603 ; sec var. = + 0". 233 ; proper motion = + 0". 018. 



VOL. XIX. 



2e 



