M.-P.— Vol. I.] CRAWFORD— CONSTANT OF REFRACTION. 1 69 



Star No. 959.— (With 282 /. c.) 



[P] = 5*% ; log[pvv] =6.3662 



A I 



o . 00462 



p. e. = i 0.00027 



[P ] = 50 ; log [pvv ] = 6. 6307 



/\ I -f- 0.00662 

 p. e. = i 0.00036 



