304 



Rutherfurd Photographic Measures. 



N<rKr» 



iOOTH 



The results are 



Comp. Stars. 7Z 



a and h 

 c and d 



+ o.349±o.o86 

 + o.385±o.o84 



Weight. 



21.7800 

 28.9724 



y 



+ o.26o=fco.o8i 

 + 0.165^0.085 



Prob. error 

 one equation. 



±0.403 

 ±0.362 

 ±0.305 

 ±.2740 

 ±0.342 

 ±0.384 



eand/ +0.568±o.O56 29.6264 +o.378±o.o78 



gandh +o.662±o.078 8.2443 +o.232±o.o49 



i and j +o.66o±o. 138 6.1457 — o. iii±o.o66 



^and I +o.297±o. 155 6.1365 — o.o7o±o.o73 



From these we get as the value of the parallax of /^ Cassiopei£e 



// // 



r = + 0.443 ± 0.043 using the first three pairs only 



or = + 0.465 ± 0.044 using all six pairs. 



It would be quite unsafe to conclude that the small result de- 

 rived from the stars k and I is due to a parallax of one or other 



