TREE TRUNK 



65 



Composition. — Write a description of the stick of 

 wood. In the first paragraph tell about the circles 

 on the end of the stick, in the second paragraph about 

 the markings on its side, and in the third paragraph 

 about the bark. 



SUPPLEMENTARY WORK 



How a Tree grows. — Have you seen a tree growing with its 

 center rotten and hollow ? In growing, does a tree need to use 

 the center of its trunk ? 



End of a Stick of Black Oak 



Have you seen great flakes of bark peeling off from a grow- 

 ing tree ? In order to grow does a tree need to use the outer 

 part of its bark ? 



All new growth goes on where the bark and wood join. 

 Each year the tree forms a new layer of wood over all the old 



OVER. NAT. STUD. — 5 



