44 



PLANTS AND SUNLIGHT 



larly marked when the struggle is severe. If the out- 

 side of a plant is densely thatched with leaves, the 

 inside will be found to be comparatively bare. Con- 



71. Branches of the cedar reaching for light. 



trast Figs. 75 and 76, both being views of one tree. 

 We know the tree as seen in Fig. 75 : the squirrel 

 knows it as seen in Fig. 76. 



105. On any branch in a very thick -topped tree or 

 bush, leaves of equal age usually tend to be largest where 



