192 



through, the posterior point of application is so 

 brought into connection with its cross hne end that 

 it can bring into action the alternate (left) posterior 

 point of apphcation, and cause this latter to produce 

 the filling of the (left) upper lung lobe under the 

 left true ribs. Finally, movement in double ac- 

 tion gives equal traction at both upper corners of 

 the sternum. 



Thus, in beginning with an anterior line, the fill- 

 ing of the corresponding posterior lung lobe leads 

 the movement up to a^ a'^ and the filling of the 

 anterior lung lobe takes place only just before the 

 action in b'^ b^. 



On the other hand, in beginning with the (right) 

 posterior line, the equaHzation of the inner bear- 

 ings on the convexes begins the movement ; this is 

 succeeded by the equalizing of the upper lung 

 lobes, and of the posterior points of application, 

 and this by the neck action, forming the bicom- 

 posite spine for the posterior lines ; finally, the 

 remaining liaK of the outer bearing for the anterior 

 line is adjusted, the (right) lower lung lobe filHng, 

 and the neck action for the anterior line forming 

 the bicomposite spine, prepares all for a movement 

 in double action which gives the same traction on 

 both shoulder blades as the terminating poitns of 



