LEAP EXPOSURE TO SUN AND AIR 149 



revolving table before a window and slowly turned during 

 the bours of dayligbt? 



158. Review Summaiy of Chapter X. 



-J, , r For vertical twies .... 



Leal arrangement ... < „ , . , , , . 



I, For horizontal twigs . . . 



(Apparatus for 

 Causes of 

 Uses of 



Compass-plants .... 



Heliotropic bending of stems ■< „ 



