255 



sary occasionally to stretch the central line of the 

 body so that the advance made may distribute 

 itself to the various parts and leave the leading 

 point again in position to draw in its first connec- 

 tion. There is also a slight, final, "double action" 

 movement necessary to complete the setting-up. 



§ 194. For the posterior line. The relative bear- 

 ing of the right upper ribs is that in which, after 

 the passing of the right socket across the head 

 joint (No. 6), the right articulation of the lower 

 jaw and the drawing of the right sterno-mastoid 

 would bring them. The actions and equalizations 

 preceding this relative bearing are first develop- 

 ed — the left lower lung lobe is condensed, some- 

 what, as the "reactionary" movement from the 

 secondary section of the forming left posterior (al- 

 ternate) line equalizes the left false ribs — ^left 

 upper lung lobe fills with the " proper " action — in 

 the bicomposite spine the left shoulder-blade 

 equalizes with the right — the right head joint 

 socket presses up against its condyle, and the 

 pressure crosses the joint to the front, following 

 which the right lower jaw equalizes on its inner 

 bearing, and the right sterno-mastoid draws. 



Second. — The same carrying forward, and to the 

 left, of the right upper part of the chest being con- 



