Permanence of the Rutherfurd I'hotographic Plates. 255 



Results of the Measures, Plate 16, Standards. 

 Date of Measures, 1896, Jan. 2. Y-coordinate (Rev'd). 



Temperature, 61.7, 65.8. Circle right 272 26 20, 26 20. 



Runs, +.0180, +.0200. Circle left 26 19, 26 20. 



Desig. 



of 

 star. 



Microm. Readings. 



Diflf. 



Mean 



2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 

 star. 



On Scale. 



Line 



34 

 34 

 34 

 34 



109 

 109 

 109 

 109 



Reading. 



A34,E 

 W 



169 E 

 W 



i8m, E 

 W 



1^0 E 

 W 



9-0325 

 9.5120 

 9.0260 

 9-5220 



9-0155 

 9-5350 

 9.0180 

 9-5065 



9.2200 

 9.7190 

 9.2120 

 9.7280 



10.6105 

 II. 1490 

 10.6080 

 II. 1295 



0.1875 

 0. 2070 

 0.1860 

 0. 2060 



I-5950 

 1. 6140 

 1.5900 

 1.6230 



0.0986 

 0.0980 



0.8022 

 0.8032 



+.0017 

 +.00x7 



— .0002 

 — .0002 



34.1003 

 34-0997 



109.8020 

 109. 8030 



D. 

 D. 



D. 

 D. 



X-cooRDiNATE (Rev'd), 



O I II I II 



Circle right 2 26 19, 26 20. 

 Circle left 26 21, 26 20. 



Desig. 



of 

 Star. • 



Microm. Readings. 



Diff. 



Mean 

 2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 

 Star. 



On Scale. 



Line 



Reading. 



A34,E 

 W 



1^1 E 

 W 



18 wi, E 

 W 



112 E 

 W 



8.9930 

 9.4660 

 9.0010 

 9.4960 



9.0065 

 9-4955 

 9-0035 

 9-4965 



lOI 

 lOI 

 lOI 

 lOI 



29 



29 

 29 

 29 



10.5325 

 9-5560 



10.5415 

 9-5885 



10.8350 

 9.8910 



10.8305 

 9.9005 



1-5395 

 0.0900 



1-5405 

 0.0925 



1.8285 



0.3955 

 1.8270 

 0.4040 



0.4074 

 0.4082 



0.5560 

 0.5578 



— .0001 

 — .0001 



+.0005 

 +.0005 



101.4073 

 IOI.4081 



29-5565 

 29-5583 



J. 



J. 



J. 

 J. 



