124 



mastery over the horse's motions is obtained, 

 which is one grand object in cavabry riding. 



§ 123. The larynx, windpipe and lungs lie, as has 

 been mentioned, entirely loose within the chest 

 and neck, and are suspended by the digastrics. Be- 

 fore speaking further of the lower jaw we will de- 

 scribe more particularly the points between which 

 the digastrics are stretched. Just behind the ears 

 may be felt, on each side, the bony protuberances 

 to which the upper ends of the sterno-mastoids are 

 fixed. Close inside of each protuberance is the 

 attachment of a digastric. From these points the 

 digastrics go forward, converging toward each other,, 

 and having run each through one of the loops on 

 either side of the windpipe, they meet together 

 and fix themselves inside of the front part of 

 the lower jaw, on either side of a line passing down- 

 ward from between the two centre front teeth. 

 The mastoid protuberances, the centre of the lower 

 jaw, and the top of the windpipe, are so easily to 

 be traced, that after mentioning the fact that these 

 cords sag down in the middle, where the windpipe 

 is suspended, it seems unnecessary to dwell longer 

 on their description. 



§ 124. Just in front of each ear one of the hinge- 



