TABLE OF CONTENTS. 



PAGE 



INTRODUCTION ' . 1 



BOOK THE FIEST. 



FORCES AND ORGANS. 



CHAPTER I. 



OF FORCES IN THE INORGANIC KINGDOM AND AMONG 

 ORGANISED BEINGS. 



Matter reveals itself by its properties When matter acts, we con- 

 clude that forces exist Multiplicity of the forces formerly 

 admitted ; tendency to their reduction to one force in the inor- 

 ganic kingdom Indestructibility of force ; its transformations 

 Vital forces, their multiplicity according to the ancient 

 physiologists Several vital forces are reduced to physical 

 forces Of laws in physics and in physiology General theory 

 of physical forces .........5 



CHAPTER II. 



TRANSFORMATION OF PHYSICAL FORCES. 



To prove the indestructibility of forces, we must know how to 

 measure them Units of heat and of mechanical work Ther- 

 mo-dynamics Measure of forces in living beings Successive 

 phases of the transformation of bodies ; successive development 

 of force under this influence Thermo-dyuamics applied to 

 living beings 13 



CHAPTER III. 



ON ANIMAL HEAT. 



Origin of animal heat Lavoisier's theory The perfecting of this 

 theory Estimates of the forces contained in aliment, and in 

 the secreted products Difficulty of these estimates The force 



