238 Permanence of the Rutherfurd Photographic Plates. 

 Results op the Measures, Plate 24, X-coordinate ( Continued). 



Desig. 



of 

 Star. 



Microm. Readings. 



Diflf. 



Mean 



2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 

 Star. 



On Scale. 



Line 



48 



49 

 48 



49 



35 

 36 

 35 

 36 



16 

 18 

 16 

 18 



Reading. 



A28, E 

 W 



95 E 

 W 



A30,E 

 W 



96 E 

 W 



A39,E 

 W 



9T E 

 W 



9-0035 

 9-5045 

 9.0100 

 9.5010 



9-0305 

 9-5045 

 8.9705 

 9-5225 



9-0035 

 9-5205 

 8.9900 

 9-5205 



9.7320 

 II. 1265 



9-7395 

 II. 1290 



10.0630 

 11.4250 

 10.0045 

 11.4485 



10.1995 

 9.6020 



10.1840 

 9-5985 



0.7285 

 1.6220 



0.7295 

 1.6280 



1-0325 

 1.9205 

 1.0340 

 1.9260 



1. 1960 

 0.0815 

 1. 1940 

 0.0780 



0.5876 

 0.5894 



0.7382 

 0.7400 



0.3194 

 0.3180 



+.0009 

 4-.C009 



+.0010 

 +.0010 



— .0004 

 — .0004 



49-0885 

 49.0903 



36.^92 

 36.2410 



17.3190 

 17.3176 



D. 



J. 



D. 

 J. 



D. 



J. 



