DISTILLATION OF STUMPWOOD. 



61 



of the apparatus devised in the Bureau of Chemistry and described 

 in detail in Bureau of Chemistry Bulletin 135, " Commercial Tur- 

 pentines." 



The distillation data, along with the other data thus obtained, 

 bring out a striking uniformity in the physical properties of cor- 

 responding samples from various sources, differing, however, from 

 the better quality of wood turpentine from the South Atlantic and 

 Gulf States in their higher, though equally narrow, boiling points. 



I 

 I 



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ft 



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V) 























<0 

 S 

































































cv 

 $ 























s, 























'0 PO <?(? <40 &? OO 7& 80 &0 



Fig. 5. — Proportion of oil to water in distillate. 



The major portion of turpentine from western yellow pine dis- 

 tilling between 170° and 175°. C. instead of 160° and 165° C, as is the 

 case with gum turpentine obtained from southern yellow pine, in- 

 dicates that in place of alpha-pinene this turpentine from western 

 yellow pine is largely made up of beta-pinene (7). 



To obtain a closer separation of its constituents, and thereby gain 

 a better insight into the proportion and nature of the bodies prob- 

 ably entering into its composition, a composite sample of refined first- 

 grade turpentine, from first and second crude turpentine combined in 



