4 CONTENTS. 



Refining Continued . 



Refining of crude turpentine No. 1 Continued. Page. 



Products of distillation 36 



Heads 36 



Hearts 37 



Tails 37 



Refining of crude turpentine No. 2 37 



Analysis 37 



Distillation 38 



Products 38 



Heads 39 



Hearts 39 



Tails 40 



Refining of crude turpentine No. 3 40 



Analysis and chemical treatment 40 



Distillation 41 



Products 42 



Heads 42 



Hearts 42 



Tails 43 



Refining of crude turpentine No. 4 43 



Analysis 43 



Distillation 44 



Products 44 



Heads 44 



Hearts 45 



Tails 45 



Products obtained by commercial refining 45 



Refining of crude turpentine No. 5 46 



Analysis 47 



Distillation 



Products . 47 



Heads 47 



Hearts 48 



Tails - 



Refining on a commercial scale 



Field work on a crude turpentine 49 



Summary of experiments 50 



Composition of wood turpentines 51 



The relation between production and composition 51 



Comparison with gum turpentine 52 



Heavy oils 52 



Dipentene 52 



Light oils 53 



Rosin oils 53 



Odor 54 



Effect of composition on technical properties 55 



Volatility 55 



Solvent properties - 55 



Drying properties 



Changes in composition after refining 56 



Composition of heavy oils in wood turpentines 58 



Specifications for wood turpentines 



Appendix , ,...,,.,,.,. , , . , , , - , 61 



