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 83 : 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. Note such woods as : 



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? 



' 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. 



