Bui. 101, U 



S. D 



ept. of Agriculture. 













Plate VIII. 





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Fig. 1 .—Penetrations of Longleaf Pine (Pinus palustris) Heartwood. 



1, piece No. 248, treated 30 minutes; 2, piece No. 135, treated 60 minutes; 3, piece No. 242, 



treated 120 minutes. 



Fig. 2.— Penetrations in Longleaf Pine (Pinus palustris) Sapwood. 



1, piece No. 143, treated 45 seconds; 2, piece No. 136, treated 45 seconds; 3, piece No. 202, treated 

 45 seconds. The appearance of these specimens is typical of treated southern pines; very 

 similar results were obtained with shortleaf, loblolly, and spruce pines. Note the difference 

 in appearance of heartwood and sapwood. 



