EOEESTRY LESSON'S ON HOME WOODLANDS 25 



Why ? An interesting study to make is the part forest products play 

 in the construction of machinery, transportation lines, airplanes, etc. 



Correlations. — Geography: Trace the timber products of the dis- 

 trict to their market. In a like manner locate the source of timber 

 products brought into the district and trace their probable route. 

 On a State map locate the timber areas and learn, if possible, the 

 important kinds of trees in each area. Locate the great lumber 

 regions of the United States. From what ports are forest products 

 of the United States exported? 



Arithmetic: Construct problems in which the prices of timber 

 products are used. Use, if possible, the value of the forest products, 

 the price of timber land, and prices of the miscellaneous forest 

 products. 



Figure 15. — High-grade saw logs and rough stave boards cut from woodlands 



Language : Make a study of the forest products of the district and 

 write a report of your study. Another report of value will be that 

 on the forest products that are imported into the district. 



Topic X. MEASURING AND ESTIMATING TIMBER 



Aim. — To teach how to measure and estimate timber. 



Sources of information. — Farmers' Bulletin 1210; Forest Service 

 Bulletin 36 ; publications of colleges of agriculture or State foresters ; 

 handy sets of log and tree scale sticks (for northern trees apply to 

 Federal Land Bank, Springfield, Mass.; for southern pines, to 

 American Forestry Association, Washington, D. C.) 



Guides to study. — Measuring saw logs: Show how the diameter 

 at the small end is found by measuring inside the bark along an 

 average line, or two measurements taken at right angles and the 

 two averaged. The diameter and length found, the approximate 

 lumber contents is found by referring to a copy of some log rule; 



