LOCOMOTION OF QUADRUPEDS 189 



united movements reproduce the gait of a quadruped. 

 Now, if one of these men for a moment slackens or 

 hurries up his rate of walking, and then continues as 

 before, the relationship will be changed, and the net 

 result will be an alteration in the quadrupedal pace. 



Fig. 124. — Transition from walking to trotting. Chronographic record, read from 

 left to right. 



This is why a soldier, who in marching has got out of 

 step, gives a little hop to regain the time. 



We have recorded some of these transitions by 

 means of chronography. Thus Fig. 124 represents such 

 a transition from walking to trotting. 



Independently of the general acceleration of beat, 



Fig. 125. — Transition from trotting to walk 



this transition is effected by an anticipatory movement 

 on the part of the hind feet, thus the fall of the left 

 hind foot PG, which in walking occurred practically 

 during the mid phase of rest of the right fore foot AD, 



Fig. 126. — Transition from trotting to gallop (three-time:-;. 



gradually assumes a position less and less in advance 

 of the fore foot, and finally the two coincide. At 

 this movement a trotting step is established. That the 

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