A TREE'S SEARCH FOR FOOD. 143 
walk, it will often put out a long wire-like 
runner quite across the gravel-walk, and enter 
the earth on the other side, where it begins to 
put out an abundance. of roots. We frequently 
A TREE IN SEARCH OF FOOD. 
also read of plants stretching out their stems to a 
pan of water, and as it were following it wherever 
it is placed. 
