230 Permanence of the Rutherfurd Photographic Plates. 

 Results of the Measures, Plate 22, Y-coordinate {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 



60 E 

 W 



A30,E 

 W 



61 E 

 W 



A39,E 

 W 



62 E 



W 



9-0165 

 95250 

 9.0060 

 9-4745 



9.0225 



9-5255 

 9.0215 

 9-5025 



9.0380 



9-5335 

 8.9990 

 9.4960 



113 

 113 

 113 

 113 



81 

 81 

 81 

 81 



39 

 39 

 39 

 39 



9.2980 

 9.8095 

 9.2860 

 9.7640 



9-5405 

 10.0490 



9-5455 

 10.0275 



10.1435 

 10.6645 

 10. 1 145 

 10.6365 



0.2815 



0.2845 

 0.2800 

 0.2895 



0.5180 



0.5235 

 0.5240 

 0.5250 



I- 1055 

 I.1310 



I-II55 

 1. 1405 



0.1415 

 0. 1424 



0.2604 

 0.2622 



0-5591 

 0.5640 



— 0.0004 

 — 0.0004 



-t-0.0032 

 +0.0033 



+0.0014 

 +0.0015 



I13.1411 

 1 13. 1420 



81.2636 

 81.2655 



39-5605 

 39-5655 



D. 

 J. 



D. 

 J. 



D. 



J. 



