CONTENTS. 



Page 



Former methods of turpentine analysis 5 



Modifications introduced 5 



The new method of analysis 9 



Apparatus 9 



Operation 11 



Results 13 



Turpentine No. 19 A gum turpentine 13 



Turpentine No. 14 A crude steam turpentine 16 



Turpentine No. 27 A refined steam turpentine 19 



Turpentine No. 22 A crude destructive-distillation turpentine 25 



Conclusions... 27 



ILLUSTRATIONS. 



Page. 

 FIG. 1. Percentage weight steam temperature curve for a mixture of two oils 



distilled in the ordinary manner 7 



2. Percentage weight steam temperature curve for a mixture of two oils 



distilled through a dephlegmator 8 



3. Percentage weight steam temperature curve for a nearly pure oil 



mixed with small quantities of higher boiling substances distilled 

 through a dephlegmator 8 



4. Apparatus used in turpentine analysis 9 



5. Working drawing of dephlegmator 10 



6. Percentage weight specific gravity curve for a gum turpentine 14 



7. Percentage weight index of refraction curve for a gum turpentine. . . 15 



8. Percentage weight steam temperature curve for a gum turpentine 17 



9. Percentage weight specific gravity curve for a crude steam-distilla- 



tion turpentine 18 



10. Percentage weight index of refraction curve for a crude steam-distilla- 



tion turpentine 20 



11. Percentage weight steam turpentine curve for a crude steam-distilla- 



tion turpentine 21 



12. Percentage weight specific gravity curve for a refined steam-distilla- 



tion turpentine 22 



13. Percentage weight index of refraction curve for a refined steam-distilla- 



tion turpentine 23 



14. Percentage weight steam temperature curve for a refined steam-dis- 



tillation turpentine 24 



15. Percentage weight specific gravity curve for a crude destructive-dis- 



tillation turpentine 26 



16. Percentage weight index of refraction curve for a crude destructive- 



distillation turpentine 27 



17. Percentage weight steam temperature curve for a crude destructive- 



distillation turpentine 28 



[Cir. 152] (3) 



