THE ESSENTIAL OIL OF DORYPHORA SASSAFRAS. 



1. Safrol aboii t 



2. Camphor about . 



3. d-a, Pinene about. 



Pf r cent. 



... 30 



... 30 

 10 



Per cent. 



4. Eugenol methyl ether, 

 sesquiterpenes, and 

 alcoholic bodies about 26 



5. Eugenol 



U 



Experimental. 



The 1,225 fbs. weight of leaves and terminal branchlets, 

 collected at different periods and in various districts, yielded 

 on distillation with steam, crude oils, which on examination 

 gave the chemical and physical characters shown in the 

 table, page 274. 



On distilling the crude oil of the first collection, 12/10/20, 

 12% came over between 175-210° C, 22% at 210- 223° C, 

 50% at 223-235° C, 12% at 235-250° 0., and 3% at 250- 

 265° C. 



For the isolation and identification of the principal con- 

 stituents, 600 ccs. of the crude oil were taken and separated 

 into 16 fractions by repeated fractional distillation at 

 10 mm. pressure. 



Determination of Terpenes. — The first three fractions 

 boiling between 50 — 60° C. at 10 mm. were redistilled at 

 755 mm. through a 4-pear column, and yielded the follow- 

 ing distillates, viz: — 



No. 



Boiling Point 



Specific 



gravity at 



15° C. 



Optical 

 rotation, 

 degrees. 



Refractive 



index at 



20° C 



1 



2 

 3 



155 - 157° C. at 760 mm. 



157-168 



158-160 



0-8650 

 0-8679 

 0-8661 



+ 64-22 

 + 64-55 

 + 62-30 



1-4678 

 1-4688 

 1-4688 



These fractions on mixing with an equivalent quantity 

 of laevo pinene, [a] D 20° O. - 50*18°, readily gave an excellent 

 yield of nitrosochloride, which after careful purification 

 melted and decomposed at 109° C* The principal terpene 

 is, therefore, d-a pinene. 



E— December 7, 1921. 



