147 



of posterior end of sternum, in the outward bear- 

 ing, in consequence of the turning of the lower of 

 the third S. Turns the upper part of left diaph- 

 ragm pillar outward, and still further expands the 

 left lower lung lobe. 



a'2 Formation of anterior part of composite 

 spine in anterior winding line — Rolls left anterior 

 comer of sternum outward and backward, and causes 

 lower part of left stemo-mastoid muscle to roll 

 in same direction — completes outer turning of left 

 diaphragm-pillar, and begins that of left psoas. The 

 turning of the left upper corner of the sternum 

 causes a partial movement in the neck root joint, in 

 its character of a ball and socket — Right fore-leg 

 shoulder socket brought close to ribs. 



a^. Continued revolution of left anterior ophi- 

 dian point of appHcation further moves neck root 

 joint, so that left head condyle turns inward by the 

 rear on its posterior end. The left digastric rolls 

 outward in its anterior portion, the loop slipping 

 backward. The left (tree) fore-foot turns outward.^ 

 The left psoas completes its outward turn, thus 

 forming the rear portion of theM-composite spine in 

 the anterior line. 



*When the trot is fully inaugurated, the anterior line which we are 

 ■now describing, is the alternate line in relation to the previous spring. 



