186 A RESEARCH ON THE EUCALYPTS OF TASMANIA 



2500 feet above sea-level. The principal constituents in 

 the oil of this species is phellandrene, and both eucalyptol 

 and pinene are practically absent. The peppermint con- 

 stituent was present in small amount. The results 

 obtained with the oil of this species from Tasmania are in 

 remarkable agreement with those of the oil of E . Delega- 

 tensis, from Delegate Mountain, Southern New South 

 Wales, collected in February, 1899 ; although the distance 

 separating thesie localities is very great. The difference in 

 the time of the year when the material was collected 

 naturally influences the physical characters somewhat, 

 because the principal terpene common to the oil of Euca- 

 lyptus species is usually present in greatest amount during 

 the early summer months. 



The average yield of oil from leaves and terminal 

 branchlets was 1"88 per cent. The crude oil was of a 

 lemon-yellow colour. It had specific gravity at 15° C. 

 — 0'8664 : rotation aj^ = — 48* 4° ; refractive index at 

 24*^ = 1*4828 ; and was insoluble in 10 volumes 80 per 

 cent, alcohol. The saponification numbei for ester and 

 free acid = 31. On rectification, the usual small amount 

 of acid water and volatile aldehydes came over below 172° 

 C. (corr.), at which temperature the oil commenced to 

 distil. Between 172-183° C. 65 per cent, distilled; 

 between 183-234° 12 per cent. ; and between 234-270° 16 

 per cent. These fractions gave the following results: — 



T>«*„*-^« « ^P- Grr. at Ref. Index 



Rotation aj,. ^^^o ^ at 24° C. 



First fraction —54*2° ... 0-8532 ... 1-4777 



SFCond fraction ... —35-6° ... 8764 ... 1-4812 



Third fraction — ... 0-9004 ... 1-4914 



The low specific gravity of the high boiling constituents 

 of the oil of this species is remarkable and most unusual. 

 The original results with the oil of this species were pub 

 lished in our work '' Research on the Eucalypts " (p. 187^. 

 That they are in agreement with those of the oil from thv 

 Tasmanian trees is shown from the following tabulate 

 results : — 



Oil of E. Delegate us is. Oil <>f E. Delegaten » 

 (Mt. Wellington. (Mt. Delegate, 



Tas., 1908.) N.8.W., 1899.) 



Yield of oil 1-88 percent. l-76percent. 



Colour of crude oil , Lemon-yellow Lemon-yellow 



Pliellandrene Abundant Abundant 



Eucalyptol Practically absent Practically absent 



Piperitone Present in small Present in small 



amount amount 



