2 ZOOPRAXOGRAPIIY 



some appreciation of the importance of the facts which 

 his investigation has revealed, not merely by the student 

 of Nature or of Art, but by that large and important 

 class uf students, known as the general public. 



Under this impression he delayed his far Occi- 

 dental expedition and returned to Chicago to find a 

 commodious theater erected for this special purpose on 

 the groimds of the Exposition, to which the name of 

 Zoopraxographical Hall had been given; the Science of 

 Zoopraxography having had its origin in the Author's 

 first experiments in 18T2. It is not intended in this 

 monograph to give more than a synopsis of the usual 

 course of Lectures on the subject, nor to reproduce 

 any of the pictured or sculptured representations 

 which are necessary for its proper elucidation, but 

 merely to describe the common methods of limb action 

 adopted by quadrupeds — especially by the horse — in 

 their various acts of progressive motion, and to illus- 

 trate the most important phases of these movements 

 by tracings from the original photogravures of the 

 Author's work. 



In the presentation of a Lecture on Zoopraxog- 

 raphy the course usually adopted is to project, much 

 larger than the size of life upon a screen, a series of 

 the most important phases of some act of animal mo- 

 tion — the stride of a horse, while galloping for ex- 

 ample — which are analytically described. These suc- 

 cessive phases are then combined in the Zoopraxiscope, 

 which is set in motion, and a reproduction of the 

 original movements of life is distinctly visible to the 

 audience. 



With this apparatus, horse-races are reproduced 



