CHAP, iv.] OF ALIMENTS. 471 



universe shows us everywhere a single force, a single movement 

 changing always in mode and in rhythm, without ever 

 being annihilated, there is also everywhere a single extended 

 substance, veritable Proteus, flowing into an infinity of combina- 

 tions, but eternally, and without being able to grow immobile or 

 to disappear. Definitively, thus, as is superabundantly proved by 

 all the natural sciences and by the long analytical exposition 

 contained in this volume, there is unity of matter as there is 

 unity of force, or rather, movement is inherent in matter, the 

 universe is constituted by a substance in movement. 



