FARM FORESTRY 255 



5. A forest museum. Let the teacher and pupils start 

 a little museum containing samples of forest products, col- 

 lections of woods, tree seeds, and other materials derived from 

 the forest. These specimens should be so arranged that 

 they may be handled and passed about from pupil to pupil 

 without injury. 



6. Determining board measure in a tree. Measure the 

 diameter of a tree of merchantable size, about breast high 

 on the trunk. Determine by "guess estimation" the number 

 of sixteen- foot logs which could be taken from the tree. Sub- 

 tract four from the diameter in inches, square the remainder, 

 and multiply the result by the number of logs in the tree. 

 The result is the approximate B. M. (board measure) feet 

 according to standard log rules. A rough estimate of lum- 

 ber content of a given area could be worked out by this 

 method. 



7. Map studies of forest areas of the United States. Con- 

 sult the maps of the United States in the school geographies. 

 Note the areas mentioned above of the great forest regions 

 of the country. Find ansAvers from the geographies and 

 from other sources to the following questions: 



1. Where are the great lumbering sections of the United 

 States? 



2. What are the principal commercial species ? 



3. In what counties of your state are the forested areas? 



4. What influence does the forest have upon water and 

 soil conditions? 



5. Upon what kind of regions should forests be perma- 

 nently maintained? Why? 



6. What is the conservation policy as applied to forests? 

 Note. Send to the Forest Service, Washington, D. C., for 



a forest map of the United States. 



8. Reports on home wood lots. The pupils should make 

 a tabular report of the home wood lot, as follows: 



