BU'.LETIN NO. 10. 



U. S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF FORESTRY. 



TIMB 



v * 



- -w. A . C -*- 5- 



AN ELEMENTARY DISCUSSION OF THE CHARACTERISTICS 



AND PROPERTIES OF WOOD. 



BY 



FILIBERT ROTH, 



Special Agent in Charge of Timber Physics. 



UNDER THE DIRECTTON OF 



B. E. FERNOW, 



CHIEF OF THE DIVISION OF FORESTRY. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1895. 



