CONTENTS. IX 



Section B. Nutrition of Fungi and of Brosera. 80. Method. 

 81. Various cultures. 82. Pucoinia. 83. Hanging-drop cultures. 

 84. Germination of spores. 85. Drosera, digestion of white of egg. 

 86. Drosera, benefit from feeding .... pp. 60 — 66. 



Section C. Functions of roots. 87. De Saussure's experiment. 

 88, 89. Boot pressure. 90. Moll's experiment. 91. Absorption 

 by means of dead roots pp.66 — 71. 



CHAPTER IV. 



TRANSPIEATION. 



Section A. Absorption of water. 92. Potometer. 93. Kohl's 

 method. 94. Effect of sunshine.' 95. Effect of wind. 96. Effect 

 of light. 97 — 100. Negative pressure. 101. Permeability of mem- 

 branes. 102. Oozing of water from wood. 103. Permeability of 

 spliut-wood. 104. Injection of flaccid shoot. 105. Emulsion ex- 

 periment. 106. Injection with cocoa-butter. 107. Compression. 

 108. Incisions. 109. Cross-cuts. 110. Do., course shown by 

 eosin. 111. Air-pump and potometer. 112. Strasburger's air- 

 pump experiment pp. 72 — 88, 



Section B. Iioss of water. 113. Loss of weight during transpi- 

 ration. 114. Transpiration compared with evaporation from water. 

 115. Loss compared with, absorption. 116. Spring balance. 



pp. 88 — 93. 



Section C. Stomata bloom lenticels. 117. Stomatal 



transpiration. 118. Stipa-hygrometer. 119. Stomata and inter- 

 cellular spaces. 120. Leaf injected with water. 121. Erost effects. 

 122. Blocking of stomata with water. 123. Movements of stomalta. 

 124. Do. with induced current. 125. Lenticels and intercellular 

 spaces. 126. Bloom as affecting transpiration . pp.. 93 — lOO. 



CHAPTER V. 



PHYSICAL AND MECHANICAL PROPERTIES. 



Section A. Imbibition, bygroscopic movements, polariscope, 

 osmosis. 127. Laminaria, microscopic observation. 128. Lami- 

 naria increase not uniform in aU direction. 129. Imbibition of seeds, 



