.;7' s 



of these it was associated with phellandrene, whilst the other twenty-one did not 

 contain that terpene. In the following lists the two classes are separated lor 

 purposes of comparison : — 



Eucalyptus oils containing crystallised eudesmol 

 in which phellandrene was absent. 



Eucalyptus oils containing crystallised eudesmol 



111 U lll( ll ]. lull. mill I -IK- «.!-. rui-si N I . 



♦Although E. globulus is included in this list, yet, Schimmel & Co. (semi-annual report, April, 1904, 

 51), suggest that this substance (eudesmol) differs in certain directions from ordinary eudesmol, and Semmler 

 proposes for it the name globulol. It was thought that similar relations existed between eudesmol and 

 globulol as between borneol and iso-borneol. 



Much Eucalyptus oil, however, supplied commercially under the name of Eucalyptus globulus had 

 not been distilled from that species, and this difficulty was early recognised by Bourchardat and Tardy during 

 their investigations on the terpene of E. globulus. [Compt. Rend. 120 (1895), 1417.] 



The oils of the following Eucalypts appear to contain only the liquid form 

 of eudesmol under natural conditions : — 



METHOD OF PREPARATION OF EUDESMOL. 



For the preparation of pure crystallised eudesmol from a freshly distilled 

 Eucalyptus oil, rich in the stearoptene, the following method was adopted as 

 being the most convenient. Constituents boiling below about 220 C. were 

 removed from the crude oil by distillation, and the remainder poured into shallow 

 vessels to crystallise. The soft buttery-like crystalline mass thus obtained was 



