DISCUSSION OF RESULTS. 



23 



DIPENTKN K. 



The detection of small differences in the proportion of dipentene 

 present can not be made by the method of examination used, espe- 

 cially when such large proportions of pine oil are present. There 

 seemed to be, "however, more dipentene in the crude turpentines pro- 



90 



80 



70 



50 



30 





\7 



92 .93 .94 



155 160' 165 170* 175* 180 86 .87 .88 .89 .90 .91 

 BOILING POINTS (CORRECTED) C SPECIFIC GRAVITY AT 15 C. 



FIG. 3. Boiling-point and specific-gravity curves for oil from run 21. 



duced at higher pressures. Figures 3 and 4, representing the distilla- 

 tion curves obtained in the analyses of the oils from runs 21 and 23, 

 respectively, illustrate this point. The oil obtained mostly at 

 atmospheric pressure from sawdust (fig. 3) apparently contains less 



