30 A RESEARCH ON THE EUCALYPTS OF TASMANIA 



and its low boiling point. It was a colourless oil as it 

 had been rectified and contained a very small amount of 

 eucalyptol. It consisted almost entirely of laevo-rotatory 

 pinene, with a little phellandrene. In September, 1910, 

 Air. Farrell noted this species growing at Monga, New 

 South Wales, and he caused it to be distilled, and sub- 

 mitted the crude oil to us for investigation. The oil was 

 light olive-brown in colour, had an odour of turpentine, 

 was very mobile, and besides consisting largely of laevo- 

 rotatory pinene, contained small quantities of phellandrene 

 and eucalyptol. Even more pinene was present than in the 

 Tasinanian oil, but this may be due to the difference in the 

 time of the year, or partly to the mode of distillation, as 

 the Monga oil had been distilled from an ordinary pot- 

 tank still, which naturally does not bring over the high 

 boiling constituents so completely as when the steam is sup- 

 plied from a boiler. The Monga oil had specific gravity 

 at 15 C. =0-8766; rotation a n = 32*5 ; refractive 

 index at 15 = 1'4702 ; and contained 11 per cent, euca- 

 lyptol, and over 80 per cent, of the total oil distilled below 

 1700 c. (corr.). 



The oil from the Tasmanian trees had specific gravity at 

 15 C. = 0-8925; rotation a D = - 22'4 ; refractive index 

 at 18 = 1'4761 ; and was insoluble in 10 volumes 80 per 

 cent, alcohol. The saponification number for the esters 

 and free acid was 3'2. The ester is thus very small in 

 amount. 



On rectification, a very small amount of acid water and 

 volatile aldehydes came over below 157 C. (corr.). 

 Between 157-172 C. 66 per cent, distilled; between 

 172-192 9 per cent. ; the temperature then quickly rose to 

 265, only a few drops distilling, and between 265-282 

 20 per cent, distilled, which apparently largely consisted 

 of a sesquiterpene. These fractions gave the following 

 results : 



Sp. Gr. at Ref. Index 



15C. lotationa D . 



First fraction ...... 0-8710 ... 35'2 ... T4f)67 



Second fraction... 0'88<>9 ... -21'2 ... P468 

 Tnird fraction.... 0-9418 ... ... 1-5019 



The eucalyptol was determined by the resorcinol method 

 in the portion distilling below 192 C., and when calcu- 

 lated for the whole oil gave 9 per cent, of that constituent, 

 The pinene was determined in the first fraction, and an 

 amount equal to 30 per cent, of the total oil came over 



