BULLETIN No. 13 (REVISED EDITION). 



U. S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF FORESTRY. 



THE 



TIMBER PINES OF THE SOUTHERN UNITED STATES. 



By CHARLES MOHR, Ph. D. 



TOGETHER WITH 



A DISCUSSION OF THE STRUCTURE OF THEIR WOOD. 



By FILIBERT ROTH. 



PREPARED UNDER THE DIRECTION OF B. E. FERNOW, CHIEF OF THE DIVISION OF FORESTRY. 



WASHINGTON: 



OOVKKNMKNT PRINTING OFFICE. 



IS!) 7. 



