REVIEW 



13 



lesson is studied, have the pupil place seeds of radish, turnip or cab- 

 bage between folds of thick cloth or blotting paper. Keep the cloth 

 or paper moist and warm. The hairs show best against a dark back- 

 ground. In some of the blotting papers, sprinkle sand : observe how 

 the root-hairs cling to the grains (compare Chapter XI). 



The pupil also should study the root-hold of a plant. Let him 

 carefully pull up a plant. If a plant grow alongside a fence or other 

 rigid object, he may test the root-hold by securing a string to the 

 plant, letting the string hang over the fence and then adding weights 

 to the string. Will a stake of similar size to the plant and extending 

 no deeper in the ground, have such firm hold on the soil ? 



Garden along the scliool-yanl fence, wliere pupils may 

 grow the plants for study 



