distillate would be uniform throughout the run. 

 The heavier constituents are carried over more 

 slowly by the steam and require extended treat- 

 ment to ensure their recovery. This also points 

 to the advantage of rapid steam evolution during 

 the last stages of the preliminary treatment in 

 order to remove the heavier oils from the solution 

 as quickly as possible. 



Flq.3 



HAHCES IN t 



IQDL 



IF RFFtACTIQIji AMP 



spmncQvm 



or <RUDE 



rURPEHTWE WHC P 



OFOSTILLATW 



/ 



ndex 



of Refaction 



at 13T 



i at I5*C 



The change in the nature of the oil during 

 distillation suggests that this direct recovery 

 might be used as a preliminary fractionation of 

 the crude turpentine into "wood turpentine" and 

 "pine oil." 



43 



