vi CONTENTS 



PAGE 



Section 2. The Processes of Increase 196 



9. Growth 196 



(a) Auxesis 196 



(&) Differentiation 217 



10. Reproduction 218 



Section 3. The Processes of Adjustment 219 



11. Irritable Response 219 



(a) Geotropism 219 



(6) Phototropism 234 



(c) Hydrotropism 237 



(<f) Thigmotropism 238 



(e) Chemotropism 239 



(/) Thermotropism 240 



(g) Other Tropisms 240 



12. Adaptation 241 



PART III. 

 MANIPULATION AND TABLES IMPORTANT IN PLANT PHYSIOLOGY. 



Manipulation . . 245 



Tables: 



Metric Measures and Weights 251 



Combining Weights of Elements 252 



Temperatures 253 



Names, English and Botanical, of the Plants most used in Experimental 



Plant Physiology 254 



Conventional Constants 255 



Air Constants 256 



Barometric Constants 257 



Vapor Tension 257 



Capillarity 257 



