36 



;. 



The curve shown in the diagram is the theoretical curve passing 

 actually through all the « calculated » points in the figure. 



With the aid of the corrected values of the constants ^0, F we 

 have recalculated the value of the expression 



(ti) 



R = — ^ Y ^°gio tg (45« 



f) 



(see previous paper, Art. 12); the results obtained are set out in 

 the following table. 



5,22 .10-5 cm 

 5,62 .... 

 5,81 .... 

 5,89 .... 



P25' 

 4046' 

 4054' 

 3040' 



E 



1,92. 10->fi cm» 



2,66 



2^79 



2.38 



Referring to p. 779 of this Bulletin for 1908, it will be perceived 

 at once that the approach towards constanc}'^ is more satisfactory 

 now. This appears still more remarkable when it is considered that, 

 owing to circumstances which it is needless to recall ^), the values 

 of q) arrived at in Mr Cotton's measurements are open to less 

 uncertainty than the rotations xp. 



Feeling that we are aproaching comparatively solid ground, we 



») Thkse. p. 69; Annales, p. 411. 



