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. 
ti 
S8 
. 
NN 
a 
V8 
N 
NY 
S § 
S 
.S) 
C8 
8 
g 
COA WAIL 
Fic. 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- 
diecates 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-. 
erade turpentine, from first and second crude turpentine combined in 
