268 Permanence of the Rutherfurd Photographic Plates. 



Table, because, as has already been stated, a number of faint stars 

 were measured on this plate, after the work originally projected 

 had been finished. The faint star measures were reduced in ex- 

 actly the same manner as the others, treating them quite inde- 

 pendently. Quantities belonging to the faint stars will be found 

 in the Table in the line numbered " 16/" in the first column. 



Angle Correction Factor. 



Plate. 



Mean 

 Q + i 



Correction Factor, i sin i" X lo* 1 



Star Measures. 



Special Standard Measures. 1 



X 



y 



X rev'd. 



y rev'd. 



X 



y 



X rev'd. 



y rev'd. 



16 

 16/ 



18 

 22 



24 



26^ 20^^ 



26 20 

 43 42 



27 52 

 20 31 



—.0485 

 —.0485 

 +.0970 

 —.0970 



+.3878 



— .0970 

 +.0485 

 —.0485 



—•1939 

 .0000 



.0000 

 —.0485 

 +.3878 

 —.0485 



.0000 



.0000 



.0000 



+.2424 



+ .0970 



— .0485 



—.0485 

 —.0485 

 —.0970 

 +.C970 

 +.0970 



.0000 



.0000 



—.0485 



+•1454 



.0000 



.0000 

 .0000 



—.0485 

 .0000 



—.0485 



.0000 



.0000 



+.0970 



+•1939 

 .oooo 



Proceeding now with the further reduction of the special stand- 

 ard measures, we have in the following Table the computation of 

 the corrected values of the quantities : 



The Table needs little or no explanation. The numbers in the 

 last column, headed "Adopted Mean," are the final corrected 

 values, reduced to the same unit of measure, in the manner de- 

 scribed above. The rotation numbers refer to the former table 

 containing the results of the measures. The quantities for plates 

 16 and 16/ are of course the same, as it was not necessary to 

 make the special standard measures a second time on the same 

 plate. 



