ELEMENTARY FORESTRY 391 



woods. What determines price ? According to the price 

 of lumber, what is the value of different trees in the 

 neighborhood ? How long has it taken for them to grow ? 

 What is the difference in price between clear lumber and 

 knotty lumber ? How may we grow clear lumber ? 



It has been estimated that we have 500,000,000 acres 

 in growing forest, and that 35 cubic feet of wood are 

 annually produced per acre. Annual consumption of 

 wood, according to Professor Fernow, is probably double 

 the amount produced. Inferences from these facts are 

 obvious. 



Interesting geography lessons may be made by asking 

 the children to draw in their maps the ranges, as given in 

 Sudworth's Check List, of the trees included in their 

 grade plan. 



For additional information on the topics of this chapter, 

 consult : 



George B. Sudworth. " Check List of the Forest Trees of the United 

 States," Bulletin No. I'j. This contains the scientific and common names 

 of 495 species and gives the geographical range of each. Washington, 

 1898. 



E. B. Fernow. " Suggestions to Lumbermen of the United States in 

 Behalf of a more Rational Forest Management," Circular A'o. 10. 



E. B. Fernow. " Facts and Figures regarding our Forest Resources 

 briefly stated," Circular No. if. 



E. B. Fernow. " Forest-Fire Legislation in the United States," Circular 

 No. 13. 



E.B. Fernow. " Forestry for Farmers." Washington, 1895. (Reprint 

 from Yearbook, 1894.) 



N. H. Egleston. "Arbor Day: Its History and Observance." Wash- 

 ington, 1896. 



For all the above, address United States Department of Agriculture, 

 Washington, D.C. 



