232 Permanence of the Rutherfurd Photographic Plates. 



Results of the Measures, Plate 22, X-coordinate (Rev'd). 

 (Continued.) 



Desig. 



of 

 Star. 



Microm. Readings. 



Diflf. 



Mean 

 2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 

 Star. 



On Scale. 



Line 



Reading. 



A28, E 

 W 



69 E 

 W 



A30,E 

 W 



TO E 

 W 



A39,E 

 W 



Tl E 

 W 



9- 5450 

 9-CI35 

 9.4930 

 9.0100 



9-5455 

 9-0365 

 9-4725 

 9-0155 



9-5365 

 9.0215 

 9.4730 

 8.9700 



77 

 75 



77 

 75 



90 

 88 

 90 

 88 



109 

 107 

 109 

 107 



10.2495 



9-9145 



10.2125 



9.9260 



9-9360 



9-6415 

 9.8740 

 9.6290 



9.7065 

 9.4170 

 9.6500 

 9-3730 



0.7045 

 0.9010 



0.7195 

 0.9160 



0.3905 

 0.6050 

 0.4015 

 0.6135 



0.1700 



0.3955 

 0.1770 

 0.4030 



0.4014 

 0.4089 



0.2489 

 0.2538 



O.1414 

 0.1450 



+.0029 

 -f.0030 



+.0018 

 +.0018 



+.0016 

 +.0016 



76.4043 

 76.4119 



89.2507 

 89.2556 



108,1430 

 108. 1466 



D. 



J. 



D. 

 J. 



D. 



J. 



