191 



and when equalized produces the two on the op- 

 posite side. 



Eleventh. — Any point giving off a bearing moves 

 in the opposite direction hy reason of the loss of it, 

 and vice versa. Thus, when the right shoulder 

 blade gives off inner bearing to the left, the former 

 recovers itself on the outer bearing. This will be 

 particularly noticeable in setting-up by double ac- 

 tion (§ 179). 



§ 163. Since the previously formed anterior wind- 

 ing line is the normal obstacle to the direct action 

 of the posterior point of apphcation, this anterior 

 line must be reduced before the full equahzation 

 of the posterior lines can have place. 



In beginning with the (left) anterior hne, the 

 equalization of the outer bearings, the filling of 

 the (right) lower lung lobe, and the reducing of the 

 upper convex proceed as far as the equalization of 

 the .anterior cross line ends will carry them, but, 

 in order to give full equalization to these lines, 

 there remains the equahzing of the inner bearings. 



This equahzing of the inner bearings has place 

 first (by reflex action from the secondary section 

 of the posterior line) in the posterior convex ; then, 

 at the seat of the secondary section, in the anterior 

 convex, by dhect action ; and these being carried 



