*22 A RESEARCH ON THE EUCALYPTS OF TASMANIA 



temperature the oil commenced to distil. Between 

 173-188 82 per cent, distilled; between 188-290 10 per 

 cent, distilled, the greater portion (7 per cent.) above 

 260. These fractions gave the following results: 



Sp. err. at Ref. Index 



Rotation . F 1: C C Ut24o> 



First fraction - l'2 c ... 0'8987 ... 1-4619 



Second traction .... + 8-*2 t ' ... 0-9501 l-489 



There is evidently a heavy, high boiling constituent in 

 the oil of this species, which has a right rotation, but it 

 was not isolated. Saponification number for the esters and 

 free acid of crude oil = 5 '8. 



The eucalyptol was determined in the first fraction by 

 the resorcinol method ; this amount, when calculated for 

 the crude oil, showed that 52 per cent, of that constituent 

 was present. 



Material of this species was collected at Little Swanport, 

 Tasmania, in June, 1908. The oil distilled from this 

 agreed in characters and constituents with the above. 

 Average yield of oil -- 1'38 per cent. Specific gravity at 

 150 c. == 0-9036; rotation a o = - 9'9 ; refractive index 

 at 24 = 1-4687, and was soluble in 7 volumes 70 per 

 cent, alcohol. Below 193 C. 77 per cent, distilled. The 

 eucalyptol was determined in this fraction by the resor- 

 cinol method, and gave 51 per cent, of that constituent for 

 the crude oil. 



Material for this species was also collected at Nubeena, 

 Tasrnan Peninsula, in April, 1912. It agreed in general 

 characters with the oil from the previous consignments, 

 only at this time of the year rather a large amount of 

 phellandrene was present, consequently the rotation to the 

 left was higher ; the eucalyptol was also slightly less in 

 amount, but still exceeded 40 per cent, in the crude oil. 

 Average yield of oil = I'l per cent. Specific gravity at 

 15 C. = 0-9045; rotation a D = - 23' 1; refractive index 

 at 18 =i 1-4743, and it was soluble in 8 volumes 70 per 

 cent, alcohol. Below 193 C. 79 per cent, distilled. The 

 eucalyptol in this portion was determined by the resorcinol 

 method ; the result showed that 44 per cent, of that con- 

 stituent was present in the crude oil. The oil of this 

 species .somewhat closely agrees with that of the form of 

 /J . amygdalina of the mainland, both in constituents and 

 physical characters, much more so than with the oil of the 

 Tasmanian form described in this paper. 



