98 



OUR FORESTS 



Conclusion. — 1. Which woods are useful for skeletons of houses ? 



2. Which are useful for trim? 



3. Which are useful for paper making? 



4. In general, which are more used, soft or hard woods? 



Problem S3 : Museum trip for study of woods. 



Materials. — Collection of commercial woods, or trip to a 

 museum.^ 



Method and Observations. — Examine specimens of the most 



important commercial woods. 



white pine spruce 



black cherry tulip 



hemlock fir 



hickory walnut 



Note such woods as 



sugar maple 

 poplar 

 black oak 

 cherry 



white oak 

 basswood 

 chestnut 

 white birch 



Describe any six of the above, telling : 



(a) The region where the trees grow. 



(6) The shape of the leaves. 



(c) The color of heart and sap woods. 



{d) Comparative weight of the wood. 



(e) Rapid or slow growth. 



(/) Economic value. 



Examine a specimen of a section of any big tree, such as a 

 California big tree. Notice the so-called annual rings in the 

 wood. About how old was this tree when it was cut? 



1 A study such as here outlined may be made at any well-equipped city museum. 

 Work of this nature may also be done in school by means of loan collections. 



