xiY CONTENTS 



CHAPTER Vin 

 Action op Heat upon Protoplasm 



PAOK 



§ 1. Nature of Heat and the General Methods of its Application . 219 



§ 2. The Effect of Heat upon the General Functions of Organisms . 222 



1. Effect of Heat upon Metabolism .... 222 



2. Effect of Heat upon the Movement of Protoplasm and its 



Irritability . . .225 



- § 3. Temperature-Limits of Life . . . . 231 



1. Temporary Rigor and Death at the Higher Limit of Tem- 



peratui-e, Maximum and Ultramaximura .... 231 



2. Temporary Rigor and Death at the Lower Limit of Tempera- 



ture, Mininmm and Ultraminimum . . . 239 



§ 4. Acclimatization of Organisms to Extreme Temperatures . 249 



1. Acclimatization to Heat . ' . . 249 



2. Acclimatization to Cold . . . 257 

 § 5. Determination of the Direction of Locomotion by Heat — Ther- 



motaxis . . .... 258 



Notes to Table XXI . . . .263 



Literature . . . . • . . 267 



CHAPTER IX 



General Considerations on the Effects of Chemical 

 AND Physical Agents upon Protoplasm 



§ 1. Conclusions on the Structure and Composition of Protoplasm 274 



§ 2. The Limiting Conditions of Metabolism . . 275 



§ 3. The Dependence of Protoplasmic Movement upon Metabolism 



and upon External Stimuli . ... 277 



§ 4. The Determination of the Direction of Locomotion . . . 278 



