CONTENTS 



Page. 



Purpose of the study 7 



Theoretical considerations 8 



Experimental methods : 9 



General procedure 9 



Apparatus 10 



Materials 11 



Preparation of material 11 



Distillation 11 



Regulation 11 



Data obtained 13 



End point 14 



Discussion of results 18 



Effect of size of chip on yield and efficiency 18 



Effect of pressure on yield and efficiency 19 



Effect of speed of distillation on yield and efficiency 19 



Relations between end point, yield, arid efficiency 21 



Pressures required to distill completely different sizes of material 21 



Sawdust 21 



Chips 1 inch by inch by J inch 21 



Chips 1 inch by inch by inch 21 



Chips larger than 1 inch by inch by \ inch 22 



Effect of pressure on composition of oil 22 



Pine oil 22 



Dipentene 23 



Light oils ' 25 



Fractionation of the oil during distillation 26 



Application of results 29 



5 



