OP ARTS AND SCIENCES. 



169 



As an illustration, we assume the following values of x, without 

 defining their signification : — 



.585" 



From equations (a) we have, — 



,=±.C74 5v /If = 



"•=±- 67 * 5 VS =± - 142 " 



And from equations (b), — 

 r 



.8453 X 11.15 __ , 571/ 



^17 X 16 

 ± .8453XU : 15 =±J39// 

 17 v/16 



If we reject the last value of x, viz. 63".90, we have : — 



From («), — // 



r = ± .474 



r = ± .119 

 From (b), — 



r = ± -491 



r = ± .123 



Let us now inquire wha. interpretation can be safely given to these 



