70 



EXPERIMENTS WITH PLANTS 



a field long fallow, from the margin of a stream and 

 from the edge of a wood take successive layers of 

 earth (each an inch in depth) from the surface down 

 to six or seven. inches deep. Let these be placed in 

 separate boxes and watered, in order to find out how 



55. Filaree seeds burrowing into cotton. 



many seeds capable of germination are contained in 

 each layer. 



Some seeds are carefully buried by the parent- 

 plants; the Peanut is one of these; by all means, 

 watch this process if possible. As the flower- stalks 

 lengthen they bend downward and bury the Peanuts 

 beneath the ground. 



