Experiments and their Verification 



173 



the equine locomotion. I have always had in view the proposition of 

 applying the kinetoscope to the horse in motion by having the camera 

 move alongside of the animal with equal speed. The result would be 

 a stationary picture as far as the horse is concerned, with all the mo- 

 tions given in detail on the same spot, while the ground would appar- 

 ently move away from the horse at the rate of his speed. The eye 

 could then more readily follow each movement of the legs and body 

 without being compelled to follow a series of pictures such as those 

 of Muybridge of thirty years ago. Such an exhibit would be highly 

 instructive and strictly up to date. 



,Fig. 136 is intended to show the probable curves of motion of the 

 legs, as seen in such a possible exhibit. It is not claimed to be an exact 

 representation of such motion, except in so far as it shows the relative 



HO./36 



positions of fore and hind legs and their angles at that position. They 

 present a pair of correlated legs moving together in either trot or pace. 

 D A is a stationary line, D being the vertex of axis of hind leg. 

 and A that of fore leg. The angles at hock (E) and at knee (B) are 

 supposed to be just opening with the forward reach of the legs. At 

 this moment the legs unfold and extend forward. The hock joint 

 having D for a vertex and the knee joint having A for a vertex, will 

 approximately describe the curves o and p; and the hind feet F and 

 the fore foot C, having hock and knee joints for vertices respectively, 

 would describe curves of motion indicated by n and m, were it not for 

 the above mentioned curves o and p, which in turn modify or change 

 the curves n and m. The resultants we will assume to be the curves r 

 (hind) and s (fore). The dotted lines are the legs when extended 



