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THE BELL SYSTEM TECHNICAL JOURNAL, MARCH 1953 



15 and 16; and similar data for the full cell toluene dilute treatments are 

 shown in Figs. 17 and 18, respectively. In spite of the attempted care in 

 selection of the specimens and in treatment of the empty eel] 8-pound 

 group, the lot is heavily weighted (see Table X) toward the high reten- 

 tion end, e.g., by the 12 stakes in the 8.9, 9.1 and 9.5 groups. The presence 

 of these relatively heavily treated stakes may explain in part the position 

 of the depreciation curves for the 8-pound treatments shown in Fig. 19. 

 On the other hand the empty cell 8-pound (nominal) stakes treated with 



4 5 6 7 8 9 



TREATMENT RETENTION IN POUNDS PER CUBIC FOOT 



10 



Fig. 16 — Distribution of ratings in relation to retention by weight at treatment; 

 creosote No. 5283, empty-cell treatment, seven years exposure. 



