CONTENTS. 



Page. 



Introduction 5 



Transpiration studies 9 



Methods 9 



Experimentation 14 



Observations on transpiration experiments 34 



Discussion of transpiration experiments 35 



Studies involving factors correlated with transpiration behavior 38 



Daily course of stomatal movement 38 



Methods 38 



Experimentation 40 



Discussion of stomatal behavior 43 



Daily course of water-content of leaves, twigs, and stems 45 



Experimentation 45 



Discussion 48 



Daily course of leaf temperature 50 



Method 50 



Experimentation 56 



Discussion 57 



Daily course of transpiration under conditions of high and low evaporation .... 57 



Method 58 



Experimentation 58 



Discussion 61 



Discussion of literature 62 



General summary' 63 



