240 Permanence of the Rutherfurd Photographic Plates. 

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



Desig. 



of 

 Star. 



Microm. Readings. 



Diff. 



Mean 

 2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 



Star. 



On Scale. 



Line 



Reading. 



A28,E 

 W 



104 E 

 W 



A30,E 

 W 



105 E 

 W 



A39,E 

 W 



106 E 

 W 



9.0450 



9-5045 

 9.0225 

 9.4890 



9.0245 

 9.5090 

 9.0185 

 9-4725 



9.0200 

 9-5140 

 8.9760 

 9-4985 



114 



114 

 114 

 114 



82 

 82 

 82 

 82 



40 

 40 

 40 

 40 



g.2280 

 9.6075 

 9.2180 

 9-5930 



9-4430 

 9-8445 

 9-4395 

 9-8175 



10.0360 



10.4500 



9. 9890 



10.4505 



0. 1830 

 0. 1030 



0.1955 

 0. 1040 



0.4185 



0.3355 

 0.4210 

 0.3450 



I. 0160 

 0.9360 

 I. 0130 

 0.9520 



0.0715 

 0.0749 



0.1885 

 O.1915 



0.4880 

 0.4912 



+.0018 

 +.0018 



+ .0035 

 +.0035 



-)-.ooo7 

 +.0006 



114.0733 

 114.0767 



82.1920 

 82.1950 



40.4887 

 40.4918 



D. 



J. 



D. 

 J. 



D. 



J. 



