86 



THE WOOD. 



removed. The use of the hollow stem is to shelter 

 the young bud during the colds of autumn. But, 

 when the leaf has fallen off, the bud is not left 



STEM AND BUD OF THE PLANE-TREE. 



without protection, for it is enveloped in a tough 

 case lined with a kind of resin which is impenetra- 

 ble to wet : within this is a similar case lined ex- 

 ternally with the same coating ; next come a num- 

 ber of scales covered with a dense coat of brown 



