CHAPTER VII. 



Illustrations of the Paces. 



The series of plates which follow are intended to show more fully 

 than was possible in the silhouettes that precede them, the action of 

 the horse in every possible position in all the paces ; they require, 

 however, a brief explanation. 



The same ground was used as that on which all the experiments 

 were made that are detailed in the Appendix ; but instead of a full 

 battery of twenty-four cameras, only five were employed, and they were 

 arranged in the manner shown in Plate I. (frontispiece). One only 

 represented the battery, and that was in the middle of the series ; the 

 other four were placed at nearly equal distances, two on each side, so 

 as to represent the arc of a circle whose centre should be occupied 

 by the horse at the moment he appeared opposite the central of the 

 five cameras. At this point a thread was drawn across the track 

 which, when the breast of the horse came in contact with it, made 

 magnetic communication with all five of the cameras at the same 

 instant, so that five views of the animal were produced at the same 

 time, showing him from as many different directions. 



The time of exposure of the negatives was so immeasurably small 

 that few of the pictures taken were perfect in all the details; and as 

 red appears as black in the photograph, so all bay horses were without 

 any details of light and shade, simply as silhouettes ; and even when 

 the horse was light or gray there would be some defect in some part 

 of every one of the series. 



Experiments were made with various processes to reproduce them 

 with all their defects ; but it was found that the making of the 



