208 



Fruits and Seeds. 



Their great numbers increase the chance that the 

 wind may waft some of them to the trees on which 

 they grow ; and as they are then fully supplied 

 with nourishment they do not require to carry any 

 store with them. Moreover their minute size is an 

 advantage, as they are carried into any little chink 

 or cranny in the bark ; while a larger or heavier 

 seed, even if borne against a suitable tree, would 

 be more likely to drop off. 



