260 Permanence of the Butherfurd Photographic Plates. 



Results of the Measures, Plate 16, Faint Stars, Y-coordinate. 



— ( Continued ). 



Desig. 



of 

 Star. 



Microm. Readings. 



Diff. 



Mean 

 2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 

 Star. 



On Scale. 



Line 



108 

 108 

 108 

 108 



55 

 55 

 55 

 55 



61 

 61 

 61 

 61 



Reading. 



A26, E 

 W 



192 E 

 W 



A27, E 

 W 



193 E 

 W 



A36,E 

 W 



194 E 

 W 



9-0195 

 9-5140 

 8.9970 

 9-4985 



9.0430 

 9-5300 

 8.9830 

 9.5060 



9.0330 



9-5340 

 8.9930 

 9.5040 



9-5615 

 10.0580 



9-5405 

 10.0295 



9-8350 

 10.3105 



9-7735 

 10. 2905 



10.7220 

 II. 2175 

 10.6880 

 11-1950 



0.5420 

 0.5440 

 0.5435 

 0.5310 



0.7920 

 0.7805 

 0.7905 

 0.7845 



1.6890 

 1.6835 

 1.6950 

 1. 6910 



0.2715 

 0.2686 



0.3931 

 0.3938 



0.8431 

 0.8465 



+.0012 

 + .0012 



+.0019 

 ■4-.OOI9 



+.0016 

 +.0016 



108.2727 

 108.2698 



55-3950 

 55-3957 



61.8447 

 61.8481 



D. 



J. 



D. 

 J. 



D. 

 J. 



