Permanence of the Butherfard Photographic Plates. 237 



Results op the Measures, Plate 24, X-coordinate. 

 Date of Measures, 1895, Dec. 13. 



O / II I II 



Temperature, 60.5, 66.0. Circle right 182 20 27, 20 27. 



Runs, +.0190, +.0190. Circle left 20 20, -lo 18. 



Desig. 



of 

 Star. 



Mierom. Readings. 



Diff. 



Mean 

 2 



Screw 



and Div. 



Error. 



Final 

 Reading. 



Obs'r. 



On 



Star. 



On Scale. 











Line 



Reading. 













A34,E 



9-OI75 



27 



9-3595 



0.3420 



0.3978 



+.0019 



27.8997 



D. 



W 



9.5110 



28 



10.7600 



1.2490 











E 



9.0180 



27 



9.3690 



0.3510 



0.3998 



+.0019 



27.9017 



D. 



W 



9.5120 



28 



10. 7600 



1.2480 











89 E 



9.0190 



27 



9-3750 



0.3560 



0.4024 



+.0019 



27.9043 



J. 



W 



9-4925 



28 



10. 7460 



1.2535 











E 



8.9780 



27 



9-3380 



0.3600 



0.4034 



+ .0019 



27.9053 



J. 



W 



9.5050 



28 



10.7585 



1.2535 











18 m, E 



9-0155 



98 



10.8430 



1.8275 



0.6256 



+.0002 



99.6258 



D. 



W 



9-5150 



100 



10.1900 



0.6750 











E 



9.0160 



98 



10.8445 



1.8285 



0.6238 



+.0003 



99.6241 



D. 



W 



9-5175 



100 



10.1840 



0.6665 











90 E 



8.9700 



98 



10.7930 



1.8230 



0.6261 



+.0003 



99.6264 



J. 



W 



9.5000 



100 



10.1815 



0.6815 











E 



9.0020 



98 



10.8265 



1.8245 



0.6255 



+ .0003 



99-6258 



J. 



W 



9-4905 



100 



10.1680 



0.6775 











24 i>, E 



8.9925 



64 



10.0240 



1.0315 



0.7336 



+.0025 



65.2361 



J. 



W 



9.5060 



65 



11.4090 



1.9030 











E 



9.0020 



64 



10.0280 



1.0260 



0.7310 



+ .0025 



65-2335 



J. 



W 



9-4955 



65 



11-3935 



1.8980 











91 E 



9.0200 



64 



10.0360 



1. 0160 



0.7270 



+.0025 



65.2295 



D. 



W 



9-5170 



65 



11.4090 



1.8920 











E 



9.0155 



64 



10.0315 



1. 0160 



0.7275 



+.0025 



65.2300 



D. 



W 



9-5275 



65 



11.4215 



1.8940 











Ai2,E 



8.9800 



70 



9-8565 



0.8765 



0.6558 



+.0032 



71.1590 



J. 



W 



9.4940 



71 



11.2405 



1.7465 











92 E 



9-0250 



70 



9.8910 



0.8660 



0.6514 



+.0032 



71.1546 



D. 



W 



9-5315 



71 



II. 2710 



1.7395 











A22, E 



8.9720 



63 



9.8985 



0.9265 



0.6872 



+.0036 



64.1908 



J. 



W 



9.4880 



64 



11.3105 



1.8225 











93 E 



9.0140 



63 



9-9305 



0.9165 



0.6815 



+.0037 



64.1852 



D. 



W 



9-5150 



64 



11-3245 



1.8095 











A24, E 



9.0150 



62 



9-9715 



0.9565 



0.6959 



+ .G031 



63.1990 



D. 



W 



9.5160 



63 



11.3430 



1.8270 











94 E 



9.0030 



62 



9.9710 



0.9680 



0.7012 



+.0031 



63.2043 



J. 



W 



9-5195 



63 



11.3565 



1.8370 











