292 THE ARTISTIC ANATOMY OF ANIMALS 



perceptible the comparison which consists in regarding a 

 horse when walking as capable of being represented by two 

 men marching one behind the other, and making the same 

 number of steps. According as they move the legs of the 

 same side at the same time in ' covering the step,' or march 

 in contretemps step, we find reproduced all the rhythms 

 which characterize the different paces of the horse. 



Professor Marey has studied these paces by a similar 

 method to that which he adopted for the walking of man, 

 and which we have already described. He employed hollow 

 balls fixed under the hoofs, and a registering apparatus 

 with four styles, each corresponding to one of the limbs. 

 The tracing obtained is rather complicated, since two sets 

 of lines are found marked. But a notation similar to 



Fig. 123. — Notation of the Ambling Gait in the Horse (after 



Professor Marey). 



that of which we have spoken can be discovered, and its 

 exact signification should now be determined. For this 

 purpose, we have selected the most simple (see Fig. 123). 

 We there see, placed in two superimposed lines, the 

 pressure markings of the right feet (white bands), and of 

 the left feet (gray bands). On the upper line are found 

 those related to the fore-legs ; the lower lines contain those 

 associated with the hind-legs. It is, in brief, the super- 

 position of two notations of the human walking movements. 

 And seeing that, as we have previously pointed out, we may 

 make a comparison between a quadruped and two men 

 placed one behind the other, it is easy to understand the 

 significance of the superimposed notations, if we accustom 

 ourselves to look on them as the notations of two bipeds. 



To read these notations — that is, to learn to know what 

 occurs at each of the movements of the pace — it is necessary, 

 indeed, to remember that they should be examined in 



