XIII. TREE TRUNK 



Material. Sticks of oak, chestnut, pine, or other stove wood pre- 

 pared by some of the boys. Leave the bark on. Cut the wood in short 

 lengths, split them in half, and smooth the ends and sides to show the 

 grain of the wood. A little oil or varnish will bring out the grain marks 

 more clearly. 



Observation. What is the name of the wood 

 that you are studying ? What is the color of the 

 wood ? What is the color of the circles on the end 

 of the stick ? How many circles are there ? How 

 are they arranged ? How far apart are they ? Is 

 the wood between the circles solid, or does it contain 

 fine holes ? In what direction do the holes run ? 

 Each circle marks a year's growth of wood. How 

 old is the stick ? 



Are there any lines on the split side of the stick ? 

 Which way do they run ? Have they anything to 

 do with the circles on the end of the stick ? 



How thick is the bark on the wood ? Is it smooth 

 or rough ? Does the outer part peel off easily ? How 

 closely is the bark fastened to the wood ? 



Drawing. Draw a picture of the end of the stick 

 of wood. Show the bark and the marks on the 

 wood. 



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