M.-P.— Vol. I.] CRAWFORD— CONSTANT OF REFRACTION. l8l 



Star No. 377 /. c— (With 1156.) 



[p] = 57; log [pvv] =6.oSi5 



A I 



0.00334 



p. e. = ± 0.00018 



[p] = 57 ; log [pvv] = 6.0105 



A I — 0-00304 



p. e. = i 0.00016 



