

68. Sufficient light. 



CHAPTER VIII 

 PLANTS AND SUNLIGHT 



98. EACH PLANT LOOKS FOR LIGHT. Green plants live 

 only in sunlight, direct or indirect, The gradual with- 

 drawal of light tends to weaken the plant; but the plant 



makes an effort to reach the light 

 and therefore grows towards it. The 

 whole habit of a plant may be changed 

 by its position with reference to sun- 

 light. Select two similar plants. 

 Place one near the window and 

 the other far from it. Watch the 

 behavior from day to day. Fig. 

 68 shows a fern which grew near 

 the glass in a conservatory : Fig. 

 69 shows one which grew on the floor of a conservatory. 

 Fig. 69 also teaches another lesson, which is to be ex- 

 plained in another chapter (Chapter XXVI). 



99. Plants grow towards the light. The most vigor- 

 ous branches, as a rule, are those which receive most light. 

 Climb a tree and observe where the thriftiest shoots are; 

 or observe any bush. 



100. When plants or their 

 parts are not stiff or rigid, they 

 turn towards the light if the light 

 comes mostly from one direction. 

 The geraniums and fuchsias in 

 the window are turned around 

 occasionally so that they will grow 

 symmetrical. Plant radish in a 



(42) 



69. In need of light. 

 Same kind of fern as No. 68. 



