172 



A RESEARCH ON THE EUCALYPTS OF TASMANIA 



The crude oils were reddish in colour, due to the action 

 of the acetic acid on the iron of the still. On removing 

 the colour the oil was of a light-primrose tint. The two 

 samples of oil had the following characters: — 



Altitude 2500 feet. Altitude 2000 feet. 



Yield of oil (per cent.) ... 0'823 0-782 



Rotation a^ —28-4° a^ = - 31-1'' 



Specific gravity at 15° C. 0*8802 0-8879 



Refractive index at 20° C. 1 -4882 1-4901 



Soluble In 5 vols. 70°/^ In 5 vols. 70% 



alcoh. by weisrht alcoh. by weight 



Eucalyptol Practically absent Practically absent 



Eudesnjol In quantity In quantity 



Phellandrene In abundance In abundance 



S.N. of ester -and free acid 13-2 S.N. = 15-4 



One of these oils was then rectified. The results are 

 tabulated with those obtained with the oil of this species 

 from Yarra Junction, in Victoria. Both oils commenced 

 to distil at 170^0. (corr.) 



Tasmanian Oil. Victorian Oil. 



170-176°C 12 per cent. 10 ]»er cent. 



176-190° C 48 per cent. 35 per cent. 



190 240° C 10 per cent. 4 per cent. 



240 280°C 23 percent. 45 per cent. 



Specific gravity at 15° C, first fraction - 8532 • 8531 



Ditto, second fraction 0-8559 0-8586 



Ditto, third fraction 0-8818 0*8845 



Ditto, fourth fracrion, before 



solidification 09515 Not taken, soon 



became solid 



Rotation a^ first fraction — 41-8° a^ = — 49-7 



^> D 



Ditto, second fraction — 40*2° ao = — 46-4 



Ditto, third fraction Lightdidnot Lightdidnot 



pass pass 



Refractive index at 20° C, first 1*4796 At 19° 0.1*4761 



Ditto, second 1*4821 ditto 1*4801 



Ditto, third 1-4852 ditto 1'4851 



The higher laevo-rotation of the first fraction over that 

 of the second fraction, together with other indications that 

 dextro-rotatory pinene was absent, and these, along with 



