Permanence of the Rutherfurd Photographic Plates. 279 



Plate 18. 



Star. 



Mag. 



Position Angle. 



Old Measures minus New Measures. 1 

















Old Measure. 



New Measure. 



Obs'd. 



Corr'd. 



In Sec. 



A 34 



7.2 



125 48 26 



51 22' 



-2 56" 



// 

 — 20 



— 0.24 



i8 m 



6.3 



324 48 4 



50 32 



—2 28 



+ 8 



+ .12 



A 12 



y-.s 



347 46 8 



47 48 



— I 40 



+56 



+ .40 



A 22 



7.0 



175 35 48 



38 42 



—2 54 



—18 



— .06 



A 24 



7.0 



9 47 46 



50 21 



—2 35 



+ I 



.00 



A 28 



7.0 



161 2 13 



4 35 



— 2 22 



+ 14 



+ .18 



A 30 



8.4 



117 36 56 



40 25 



—3 29 



—53 



— -45 



A 39 



7.7 



61 2 22 



4 48 



— 2 26 



+10 



+ .14 









Distance. 





Old Measures minus 



Star. 



Mag. 









New Measures. 



Old Measure. 



New Measure. 



New Meas. 











Ku. Scale. 



Millimetres. 



Ru. Scale. 



Scale. 



In Sec. 



A 34 



7.2 



86.9566 



46.0636 



86.9640 



—.0074 



— 0.21 



18 m 



6.3 



112.7787 



59-7363 



112.7768 



+ .0019 



+ .05 



A 12 



7-5 



52.9521 



28.0453 



52.9471 



+.0050 



+ .14 



A 22 



7.0 



25.9632 



13-7538 



25.9660 



—.0028 



— .08 



A 24 



7.0 



22.5045 



II. 9146 



22.4938 



-f.0107 



+ .30 



A 28 



7.0 



93-959° 



49-7711 



93-9635 



—.0045 



— .13 



A 30 



8.4 



61.8324 



32.7502 



61.8296 



+.0028 



+ .08 



A 39 



7-7 



103.3596 



54-7515 



103.3660 



— .0064 



— .18 



Sum, 





560.3061 



296.7864 









