M.-P.— Vol. I.] CRAWFORD— CONSTANT OF REFRACTION. 173 



Star No. 1005.— (With 264 /. c.) 



[p] = 56; log [pvv] =6.2452 



A 



0.00215 



p. e. = i 0.00021 



[P ] = 49% ; log [pvv] = 6.0442 



p. e. = i 0.00019 



