22 



RiUherfurd Photographic Measures. 



Table V. — Parallax Equations. 

 Comparison Stars e and/. 



o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 

 2y2 



Normal Equations. 

 4-17.00000: -|- 7.9400^ 4" 5.78oo9r — 11.0600 ^ 

 4-2S.8344 4-22.9844 —16.4388 = 

 4-33 7618 —30.7096 = 



V. 



—0.44 



— 0.02 



4-1.29 



— 0.29 



-fo.69 

 -1-035 



—0.33 

 -fo.24 



— 0.27 

 — 0.69 



—1. 16 



—^■73 

 4-0.02 



—0.37 

 4-1.66 

 — 0.91 

 -I-I-94 



r= 15 07 



o 

 o 

 o 



Solution. 

 In units 2d dec. place. 



w = 4-1. 1570 ±0.1783 

 3/ = — 0.4854 ±0.2006 



X = -f.0.4839 ±0.1820 



In Arc. 



«• = 4-0.3241 ±0.0499 

 y = — O. 1360 ±0.0562 

 X == 4-0.1355 ±0.0510 



Scale. Arc. 



Prob. error of one equation = 0.7001 = o". 1961 



