The Parallax of r^ Cassiopeise. 31 1 



Table V. — Parallax Equations. 

 Comparison Stars c and d. 



Normal Equations. 



+ 20.oooo.r + 18.2200J' — o.420on- -L 1.3200 ==r o 



+ 34.7690 — 4-1472 —4-3505 = 



~ 29.7612 — 38. 6706 = O 



Solution. 



In units of 2d dec. place. In Arc. 



TT z= +1.3735 ± 0.3002 TT z= +0.3847 ±0.0841 



y = +0-5902 ± 0.3036 y = +0.1653 ±0.0850 



X = — 0.574S ± 0.2828 .r =^ — 0.1610 ±0.0792 



Scale. Arc. 



Probable error of one equation = ± 1.293 = — 0^^.362. 



Annals N. Y. Acad. Sci., VIII., April, 1895.-23 



