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 91 



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 ......... ^2 



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 uq 



A. Flagellata ju 



B. Ciliata jj, 



2. Reaction to Mechanical Stimuli u- 



3. Reaction to Chemicals . . . . . . . . . , _ .120 



4. Reaction to Heat and Cold i^a 



Literature 127 



