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00 THE ARTISTIC ANATOMY OF ANIMALS 



In a word, the foot-fallings occur in the following order 

 and at regular intervals — the fore right foot is here con- 

 sidered as acting first : right fore, left hind, left fore, right 

 hind, and so on in succession. 



As to the nature of the bipeds which succeed one another, 

 it is easy to understand them by means of the notation. 

 In reading this from left to right, we see that the associations 



Fig. 135. — Notation of the Gallop divided into Three Periods 

 OF Time (after Professor Marey). 



I, First period ; 2, second period ; 3, third period. 



of pressure are first made by the two right feet, then by a 

 right foot and a left one, then by two left feet, and, finally, 

 by a left and right. It is, accordingly, a succession this time 

 of lateral and diagonal pressures. 



Thus, we find at the start a right lateral pressure 

 (Fig. 129), next a right diagonal (Fig. 130), then a left lateral ; 



Fig. 136. — Notation of the Gallop of Four Periods in the 

 Horse (after Professor Marey). 



I, First period ; 2, second period ; 3, third period ; 4, fourth period. 



finally, a left diagonal pressure. It is thus that the initial 

 letters L, D, L', D' further indicate the notations repre- 

 sented in Fig. 128. 



The Gallop. — The ordinary gallop is a pace of three 

 phases. The first is characterized by the fact that one 

 hind-limb alone rests on the ground (Fig. 131) ; in the 



