X CONTENTS 



PAGE 



3. Reactions to Heat and Cold 70 



4. Reaction to Light ............. 72 



5. Orienting Reactions, to Water Currents, to Gravity, and to Centrifugal Force . 73 



A. Reactions to Water Currents ......... 73 



B. Reactions to Gravity ........... 75 



C. Reaction to Centrifugal Force ......... 78 



6. Relation of the Orientation Reactions to Other Reactions 78 



Literature ............... 79 



CHAPTER V 



Behavior of Paramecium (continued) 



Reactions to Electricity and Special Reactions 



1. Reactions to Electricity 80 



A. Reaction to Induction Shocks 81 



B. Reaction to the Constant Current 83 



2. Other Methods of Reaction in Paramecium 89 



Literature 9 1 



CHAPTER VI 

 Behavior of Paramecium (continued) 



Behavior under Two or More Stimuli ; Variability of Behavior ; Fission and 

 Conjugation ; Daily Life ; General Features of the Behavior 



1. Behavior under Two or More Stimuli 92 



2. Variability and Modifiability of Reactions 98 



3. Behavior in Fission and Conjugation . 102 



4. The Daily Life of Paramecium 104 



5. Features of General Significance in the Behavior of Paramecium .... 107 



A. The Action System 107 



B. Causes of the Reactions, and Effects produced by them . . . ,108 

 Literature 109 



CHAPTER VII 



Behavior of Other Infusoria 



Action Systems. Reactions to Contact, to Chemicals, to Heat and Cold 



1. The Action System "O 



A. Flagellata m 



B. Ciliata "3 



2. Reaction to Mechanical Stimuli . . . . . • • • • ■ Il 7 



3. Reaction to Chemicals 1 20 



4. Reaction to Heat and Cold 124 



Literature I2 7 



