258 Permanence of the Rutherfurd Photographic Plates. 



Results OP the Measures, Plate 16, Faint Stars, X-coordinate, 



( Continued ). 



Desig. 



of 

 Star. 



A 26, E 

 W 



183 E 

 W 



A27, E 

 W 



184 E 

 W 



A36,E 

 W 



185 E 

 W 



Microm. Readings. 



Diff. 



Mean 

 2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 

 Star. 



On Scale. 



Line 



Reading. 



9-OI45 

 9-5225 

 8.9970 

 9-5070 



9-0595 

 9-5205 

 9-0005 

 9.4920 



9.0485 



9-5115 

 9.0050 

 9.5140 



59 

 60 



59 



60 



52 

 53 

 52 

 53 



26 



27 

 26 



27 



10.8215 



10.7845 

 10.8170 

 10.7745 



10.2660 

 10.1710 

 10.2135 

 10.1425 



9.6730 

 9-5770 

 9.6220 

 9-5880 



1.8070 

 1.2620 

 1.8200 

 1-2675 



1.2065 

 0.6505 

 1. 2130 

 0.6505 



0.6245 

 0.0655 

 0.6170 

 0.0740 



0.7672 

 0.7719 



0.4642 

 0.4659 



0.1725 

 0.1728 



+ .0024 

 +.0025 



+.0012 

 +.0012 



+-O025 

 + -0025 



60. 2696 



60.2744 



52-9654 

 52.9671 



26.6750 

 26.6753 



D. 



J. 



D. 



J. 



D. 



J. 



