UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 607 



Contribution from the Forest Service 

 HENRY S. GRAVES, Forester 



Washington, D. C. 



PROFESSIONAL PAPER 



June 7, 1918 



TESTS OF THE ABSORPTION AND PENETRATION 



OF COAL TAR AND CREOSOTE IN 



LONGLEAF PINE 



By 



CLYDE H. TEESDALE, in charge, Section of Wood Preservation, and 



J. D. MacLEAN, Assistant Engineer in Forest Products 



Forest Products Laboratory, Madison, Wis. 



CONTENTS 



Introduction 1 



Materials Used . . 2 



Effect on Penetration of Differences in 



the Preservative .'■ .' 5 



Tests of the Effect of Varying Time, Pres- 

 sure, and Temperature 12 



Summary 21 



Appendix 23 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1918 



