Permanence of the Rutherfurd Photographic Plates. 277 



Plate 16. 





Mag. 



Position Angle. 



Old Measures minus New Measures. 1 



















Old Measure. 



New Measure. 



Obs'd. 



Corr'd. 



In Sec. 



A 34 



7.2 



/ // 

 125 44 50 



45 36 



-46' 



// 

 



// 

 0.00 



i8 m 



6.3 



324 44 44 



45 34 



—50 



— 4 



— .06 



A 12 



7-5 



347 42 26 



43 14 



-48 



— 2 



— .01 



A 22 



7.0 



175 32 20 



33 16 



-56 



— 10 



— .04 



A 24 



7.0 



9 43 12 



44 6 



—54 



— 8 



— .02 



A 28 



7.0 



160 58 36 



59 16 



—40 



+ 6 



+ .08 



A 30 



8.4 



117 33 28 



34 16 



-48 



— 2 



— .02 



A 39 



7-7 



60 58 28 



58 57 



—29 



+ 17 



+ .41 









Distance. 





Old Measures minus 



Star. 



Mag. 









New Measures. 



Old Measure. 



New Measure. 



New Meas. 











Ru. Scale. 



Millimetres. 



Ru. Scale. 



Scale. 



In Sec. 



A 34 



7.2 



86.9490 



46.0613 



86.9532 



— .0042 



— 0.12 



18 m 



6.3 



112.7634 



59-7346 



112.7654 



— .0020 



— .06 



A 12 



7-5 



52.9467 



28.0505 



52.9530 



—.0063 



— .18 



A 22 



7.0 



25-9518 



13.7421 



25.9420 



+.0098 



+ .27 



A 24 



7.0 



22.5020 



II. 9168 



22.4962 



+ .0058 



+ .16 



A 28 



7.0 



93-9548 



49.7721 



93-9585 



—.0037 



— .10 



A 30 



8.4 



61.8204 



32.7479 



61.8207 



—.0003 



— .01 



A 39 



7-7 



103.3588 



54.7512 



103.3579 



+.0009 



+ -03 



Sum, 





560.2469 



296.7765 





1 



Annals N. Y. Acad. Sci., IX, January, 1897.— 19. 



