6 Elementary Plant Physiology. 



Exhalation of carbon dioxide by germinating peas, 104. 

 General reactions of a plant to light, 122. 

 Geotropism; relation of plants to gravity, 129, 130. 



COURSE 2. 



Suitable for twenty-four laboratory periods. Carry out ex- 

 periments included, read remainder of book and the references 

 to the special subjects investigated in works cited above. 



Elongation of dicotyledonous stems, i. 

 Measurement of growth in length by auxanometers, 6. 

 Growth of leaves, 8, 10, n. 

 Growth of roots, 14. 

 Germination of pollen cells, 31. 

 Germination of seeds of the squash, 38. 

 Sprouting of sweet potatoes, 41. 

 Osmose in plant tissues, 45. 

 Tissue tensions, 49. 

 Bleeding, 50, 51. 

 Hygroscopic movements, 55. 

 Structure of leaves, 57, 58, 59. 

 Estimation of the amount of water transpired, 65. 

 Guttation, 66. 

 Path of sap, 70, 71. 

 Air passages in plants, 74, 75, 76. 

 Composition of the body, 78, 79. 

 Water cultures, 83. 



Exhalation of oxygen by green plants, 93. 

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

 96. 



Exhalation of carbon dioxide by germinating peas, 104. 

 Action of diastase and associated enzymes, 111. 

 Action of glandular hairs, 118. 

 General reactions of a plant to light, 129, 130. 



