RESISTANCE OP CONIFERS TO CREOSOTE INJECTION. 



11 



GROUPING OF SPECIES. 



GROUPING WITH RESPECT TO PENETRATIONS AND ABSORPTIONS. 



Table 2 gives the average longitudinal and radial penetrations 1 

 and the absorptions obtained in the penetrance and impregnation 

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REL&TION BETWEEN ABSORPTIONS AND PENETRATIONS 



Fig. 3. — Relation between absorption and longitudinal and radial penetration. (Species 

 platted in order of magnitude of absorptions.) (S=sapwood; H=heartwood.) 



tudinal penetrations, beginning with the least; the order in respect 

 to radial penetration and absorption, respectively, is indicated nu- 

 merically, each in a separate column. The relation between absorp- 

 tion and penetration is shown more clearly in figure 3, in which the 

 absorption and corresponding radial and longitudinal penetrations 



1 In obtaining average penetrations only the region in direct line with the pressure was 

 taken into account. 



