8 Elementary Plant Physiology. 



Estimation of the amount of water transpired, 65. 



Guttation, 66. 



Localization of transpiration, 67. 



Hygrometer test for transpiration, 68. 



Path of sap, 70, 71. 



Rate of movement of water through stems, 72. 



Air passages in plants, 74, 75. 



Osmose of gases, 77. 



Composition of the body, 78, 79. 



Corrosive action of plants on minerals, 82. 



Water cultures, 83. 



Exhalation of oxygen by green plants, 93. 



Changes produced in the air by a flame and by green plants, 



96. 



Formation of starch in light, 97. 



Estimation of the amount of carbon dioxide given off in the 

 respiration of germinating wheat, 105. 



Respiration without external oxygen, 107. 



Products of fermentation, 109. 



Action of diastase and associated enzymes, 1 1 1 . 



Digestive action of scutellum of Indian corn, 112. 



Translocation of carbohydrates from leaves, 116. 



Excretion of nectar, 117. 



General reactions of a plant to light, 122. 



Diaphototropism, 124. 



Perceptive region in leaves of grasses, 125. 



Movements due to intensity of illumination, 128. 



Geotropism ; relation of the plant to gravity, 129, 130. 



Location of motor zone in roots, 131. 



Hydrotropism of roots, 134. 



Chemotropic movements of pollen tubes, 136. 



Movements in response to shock, 137. 



Movements of tendrils, 139. 



Carpotropic movements, 141, 144. 



