SUMMARY OF CONTENTS 



Introduction 



Problems of Physiology, i ; Methods of Physiology, 2. 



PART I 

 METABOLISM 



I. Material Composition of the Plant 



Chemical analysis, 3. Microscopical analysis, 6. Structure of the cell, 7 ; chemistry 

 of the cell, more especially of the protoplasm, 8. 



II. Absorption of Materials in General 



Osmosis, ii. Osmotic characters of protoplasm, 12. Impermeability, 1 2 ; osmotic 

 pressure, 13 ; permeability, 13 ; storage, 20 ; selective power, 20. 



III. Absorption of Materials in detail. Fate of the Substances absorbed 



CHAPTER I 



Water 



1 . Significance of water, 24. 



2. Absorption of water. Through the root ; characters of the soil, 25 ; characters 



of the root, 26 ; external influences, 31. Through aerial organs, 32. 



3. Excretion of water. Transpiration. Proof, 35 ; cuticular and stomatal tran- 



spiration, 38 ; external influences, 38 ; stomata, 39 ; retardation of tran- 

 spiration, 42 ; promotion of transpiration, 42 ; significance of transpira- 

 tion, 43. Excretion of liquid water, 50 (see under 4). 



4. Conduction of water. Organs for the conduction of water. Cells, 45 ; vessels, 



47 ; filling of vessels with water, 49. Bleeding, 50 ; conditions, 53 ; causes, 

 54. Excretion of water by hydathodes, 58 ; significance of the excretion 

 of liquid water, 59. Mode of conduction of water. Problems connected 

 with the quantity of water conducted, 61 ; root pressure as a cause of the 

 conduction of water, 63 ; leaf suction as a cause of the conduction of 

 water, 64 ; physical questions, 64 ; peculiarities of the plant, 66 ; Jamin's 

 chain, 71 ; influence of living cells, 74. 



CHAPTER II 



Mineral Constituents 



1. Source of the mineral constituents, 77. 



2. Absorption of the mineral constituents, 78. 



3. Significance of the mineral constituents, 80 ; necessity for certain elements, 8p ; 



evidence for this necessity, especially by means of water culture, 81 ; sig- 

 nificance of the essential elements, 83 ; unessential nature of other elements, 

 86 ; stimulants, 87. 



