296 THE ARTISTIC ANATOMY OF ANIMALS 



Indeed, if we examine the notation of this gait (Fig. 125), 

 we see that with the pressure of the right fore-foot is found 

 associated the pressure of the left hind-foot. It is, accord- 

 ingly, a typical diagonal biped (Fig. 126). 



But it is necessary to add that these groups of pressures 

 do not succeed one another without interruption, except 

 in the slow trot. In the ordinary trot, or in that in which 

 the animal's strides are very long, the body between each 

 of the double pressures which we have just been consider- 

 ing is projected forward with such force that it remains for 

 an instant separated from the ground. This is what we 

 designate by the name of time of suspension (Fig. 127). The 

 notation in this case would be slightly different from that 

 which we reproduce above, in this sense : that between the 

 diagonal pressures there then would be found an interval. 



L' D' 



Fig. 128. — Notation of the Pace of Stepping in the Horse 

 (after Professor Marey). 



L, Right lateral pressure ; D, right diagonal pressure ; L', left lateral 

 pressure ; D', left diagonal pressure. 



since during the time the body is suspended none of the 

 feet can produce a pressure-mark (see, with regard to 

 these intervals, the notations of the running of a man, 

 Fig. 118, and Fig. 119,3,4). 



The Walk. — Although slow, a feature which would seem 

 to make it possible to permit its analysis in a horse when 

 walking, this pace is difficult to comprehend without 

 sufficient preliminary study. 



We saw above that in order to represent the amble the 

 marchers had to move the legs of the same side simul- 

 taneously. We have also just seen that in order to re- 

 present the trot the marcher at the back had to anticipate 

 by a half-step. Suppose, now, that this same marcher 

 anticipates the man in front by a quarter-step only, or by 



