CONTENTS 



(The number of experiments is indicated after each topic.) 



INTRODUCTORY 



Pagb 

 I. Animal behavior (1-19) 2 



PHYSICAL AND CHEMICAL PRINCIPLES 



II. Surface tension (1-19) 10 



III. Ions (1-8) 14 



IV. Colloids (1-8) 18 



V. Enzyme action (1-10) 22 



VI. Plasmogeny (1-19) 26 



INFLUENCE OF EXTERNAL FACTORS ON THE ORGANISM: IRRITABIUTY 



VII. Amoeboid movement (1-7) 32 



VIII. Ciliary movement (1-5) 34 



IX. Muscular movement and nervous action (1-5, 1-30) 40 



X. Elementary physiology of the central nervous system (1-10) 58 



XI. Permeability and osmotic pressure of living cells (1-16) 64 



INTERNAL FACTORS IN THE ORGANISM: THE "MILIEU INT^RIEUR" 



XII. Temperature characteristics (1-3) 76 



XIII. Rhythmicity of the heart (1-18) 78 



XIV. Invertebrate hearts (1-7) 92 



XV. Comparative physiology of respiratory pigments : (1-6) 96 



XVI. Comparative physiology of respiration (1-6) 104 



INDEX 113 



