M.-P. VOL. I.] CRAWFORD-CONSTANT OF REFRACTION. 183 

 STAR No. 406 /. c. (With 1162.) 



I 0.00318 



= 50 ; log [pvv} = 5-7810 



STAR No. 406 /. c. (With 1179.; 



P> e- = db 0.00015 



A 



0.00292 



= 5-6978 



p. e. = 



o. oooi i 



