220 



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



f Canis Majoris. 



8 = - 29° 59' 34". 62 (J. H.) 



Precession = — 1".205 ; sec var. = — 0". 335 ; proper motion = — 0".022, 



17 X (^a = — 33".53 

 K = 10.0672 



dvi=- 1".97 

 rf/i= — 0".196 



38. f Sagittarii. 

 *g = — 30°6'49". 15. (J.) 

 Precession = + 4".487 ; sec var. = + 0",543 ; proper motion (J.) = — 0".013. 



* The proper motion is deduced from J., as Airy's places for 1836 and 1837 differ 2".68. 



