117 



action of the ribs, reduces the cavity of the chest 

 at the spring. The epiglottis, still refusing to allow 

 the escape of air, it is condensed, and the equiva- 

 lent expansion assists in developing the alternate 

 shape, so soon as the compression is removed. 



§ 116. It is our next object to trace the succes- 

 sion in filling or exhausting the different parts of 

 the lungs, as the one or the other accompanies the 

 formation of the winding-lines, and their reaction 

 on each other in the different C C. 



Supposing, as usual, the left anterior point of 

 application to commence the workings, and this 

 hy the ophidian S. The formation of the right 

 •convex of the upper C, and of the left convex of 

 the lower C, by the left anterior winding-line, will 

 enlarge the right upper lung lobe upward, and the 

 left lower lobe downward (§ 113). 



The reflex action from the secondary section of 

 the right posterior line (b' § 58) very particularly 

 enlarges the left lower lung, as it draws downward 

 the rib articulations. 



Meantime, the air is drawn from the left upper 

 and right lower lobes and into the left lower and 

 right upper. 



Next we have the direct action of the secondary 

 section of the right posterior line, coming from the 

 6 



