202 



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



39 X rfR = - 58". 99 d& = — 1".51 



K = 4.5685 dfi z=z— 0.331 



46 Andromedcs. 



Thirteen observations (1838. 083) give, 



8 = + 44° 38' 7". 08. 



Precession := -j- 19".065 ; sec var. = — 0".l6l ; proper motion = — 0".0l7. 



