197 



(Left) Anteriob Line Leading. 



Forcing by ( B b'^. 



Induction. ^ 



By bringing back the 

 " left - right anterior 

 cross-line end " from 

 its displacement, the 

 * ' right - left jDosterior 

 end " is brought into 

 action, and by but a 

 little further movement 

 of a^, as it fills the right 

 lower lung lobe, the 

 necessary forcing, in 

 the right posterior line, 

 is given, and the reac- 

 tion of bi begins in the 

 posterior C of the 

 ophidian S. This 

 equalizes the inner 

 bearings of this C, after 

 which the action in the 

 secondary section 

 equalizes the inner 

 bearings of the anterior 

 C. 



The eye muscles 

 equalize on the inner 

 bearings — first, by re- 

 action in the posterior 

 portion ; then in the 

 anterior portions at the 

 ** secondary sections" 

 of the posterior line 

 (§ 25). 



9* 



Forcing by ^ B b^ 



Induction. \ 



The right lower point 

 of application now 

 draws directly, and at 

 the focus, between the 

 lung lobes, equalizes 

 the posterior cross-line 

 ends of the ophidian S. 

 The eye muscles 

 equalize on the inner 

 bearing at their pos- 

 terior ends. 



