Bui. 606, U. S. 



Plate VIII. 



Penetration in Hickory Heartwood (Hicoria alba). 



1, piece No. 69 treated 30 minutes; 2, piece No. 70 treated 60 minutes; 3, piece No. 71 treated 120 

 minutes. Note the uniform penetration in wood even at a considerable distance from the part 

 where creosote was applied. 



