CONTENTS. XI 



CHAPTER VII. 



PATH OF MOVEMENT OF LIQUIDS IN PLANTS. 



Place the cut ends of leafy shoots in a solution of some red dye, 

 94. These solutions color the tracts in the stem and leaves 

 through which they flow, 95. Structure of the fibro-vascu- 

 lar bundles, gS. Woody portion of the bundle, 99. Bast 

 portion of the bundle, 100. Cambium region of the bundle, 

 101. Longitudinal section of the bundle, 102. Vessels or 

 ducts. 103. Sieve tubes, 105. Fibro-vascular bundle in In- 

 dian corn, 107. Rise of water in the vessels, 108. Synopsis 

 of tissues, no page 42 



CHAPTER VIII. 



DIFFUSION OF GASES. 



Gas given off by green plants in the sunlight, III. What this 

 gas is, 117. Oxygen given off by green land plants also, 

 118. Absorption of carbon dioxide, 119. The gases are 

 exchanged in the plants, 122. A chemical change of the 

 gas takes place within the plant cell, 123. Gases as well as 

 water can diffuse through the protoplasmic membrane, 124 



page 49 



CHAPTER IX. 



RESPIRATION. 



Oxygen from the air consumed during germination of seed, 127. 

 Carbon dioxide given off during germination, 128. Respi- 

 ration is necessary for growth, 130. Energy set free during 

 respiration, 132. Respiration in a leafy plant, 133. Respi- 

 ration in fungi, 134. Respiration in plants in general, 135. 

 Respiration a breaking-down process, 136. Detailed result 

 of the above experiment, 137. Another way of performing 

 the experiment, 138. Intramolecular respiration, 139. .page 54 



CHAPTER X. 



THE CARBON FOOD OF PLANTS. 



, Starch formed as a result of carbon conversion, 141. Iodine 

 used as a test for starch, 142. Schimper's method of testing 



