IIORSE-BACK RIDING. 13 



ilation of a new quantity of organic matter under a 

 suitable form, the elements of which the body draws 

 from the blood and the air breathed. 



"The flame of life," says Schraebcr, "from the 

 first pulsation to the last is continually lighted at the 

 stove of the transformation of matter." Hence, the 

 more rapid and complete the renewal of the substance 

 of the body, that transformation of matter grown old, 

 in other more fresh, the more life will gain in fresh- 

 ness, in strength, and in duration. 



Thus, in order that our body be well, it is neces- 

 sary that the molecules constituting it be renewed, 

 be constantly made young again. Any departure 

 from this order of phenomena, if not rapidly com- 

 pensated, produces suffering, disease, death. 



But the stimulation of the renewal of matter and 

 the refreshing of life is determined generally by the 

 activity of the organs of the body, as long as there is a 

 harmonious relation kept up between exercise and 

 the time of repose. 



The movements which are accomplished by the 

 animal economy, says Beclard, are numerous and 

 varied. The most striking and extended are the 

 movements of totality, that is to say, the movements 

 of locomotion, by virtue of which man and the ani- 

 mals voluntarily change their relations with other 

 bodies and move in the midst of surrounding objects. 

 Of these movements are walking, running, swim- 

 Another order we might call partial 



