UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 1064 



Contribution from the Forest Service 

 WILLIAM B. GREELEY, Forester 



Washington, D. C. T August 21, 1922 



OLEORESIN PRODUCTION 



A MICROSCOPIC STUDY OF THE EFFECTS 

 PRODUCED ON THE WOODY TISSUES OF 

 SOUTHERN PINES BY DIFFERENT METH- 

 ODS OF TURPENTINING 



By 



ELOISE GERRY, Microscopist 

 Forest Products Laboratory 



CONTENTS 



Pags 



The Naval Stores industry . 1 



Purpose of the Investigation 2 



Oleoresin 3 



Structure of Wood of Turpentine Pines 4 



Methods of Study 7 



Process of Turpentining 8 



Results Obtained by Different Methods 12 



Chipping in the Lightwood 31 



Suggestions for Future Practice 33 



Suggestions for Future Research 38 



Summary 40 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1922 



