abscissas represent the total time of heating, start- 

 ing from room temperature. The ordinates show 

 the percentages of the total turpentine in the 

 wood, which were recovered at different stages of 

 the steaming. % 



l! 



BATE flLCI tUOt: UBtt ffllf DiSI. 



DURING PRELIM 



NARY 



Heat 



STEAMING 



J_AT 



The most noticeable feature is that the great bulk 

 of the turpentine was recovered during the first 

 stages of relieving and about as fast as the steam 

 could carry it over. After relieving one hour, 

 approximately 75 per cent of the turpentine had 

 been recovered. The last 25 per cent was evolved 

 more slowly. With proper appliances for more 

 rapid distillation of steam, it is quite probable that 

 this proportion of the turpentine could be recovered 

 in much less time. The final upward turns of the 

 curves represent the last fractions which were car- 

 ried over by the rather large quantities of steam 



40 



