1 2 3 4 5 6 7 8 9 10 II 12 13 14 



TREATMENT RETENTION IN POUNDS PER CUBIC FOOT 



Fig. 12— Soil-block tests against Lcnzites irahea; weathered blocks; comparison 

 of preservatives A, B and E (Fig. 10) ; based on Madison data. The Madison treat- 

 ment thresholds for these 3 preservatives were set at 3.2, 4.8 and 4.0 Ib/cu ft, 

 respectively. In the poorly protected blocks note the higher per cent weight losses 

 caused by Lenzitea trabea in comparison with weight losses caused by Lentinus 

 lejndeua (Figs. 10 & 11). See Table VIII and Bibliography, Reference 41. 



158 



