64 A RESEARCH ON THE EUCALYPTS OF TASMANIA 



The following tabulated results give the general char- 

 acters of the crude oil from three consignments, col- 

 lected at the localities and on the dates given: 



Nubeena, Tasmau 



Hobart. Peninsula. Hobart, 



(16.4. 1 -2 ) (18.4.12.) (15.6.1-2.1 



Yield of oil 1-64 per cent. 2-04 per cent. 1/62 per rent. 



Specific gravity at 



15 C 0-883 0-8668 0-8848 



Rotation a D ... -75-1 -59-1 - 67'3- 



Ref. index at 18. 1-4790 At 20 =1 -4767 At 18= 1-476] 



Soluble In 1 vol. 80/ 7 vols. 70/ 1 vol. 80/ 



alcohol alcohol alcohol 



Eucalyptol: 12 per cent. 24 per cent. 16 per CHIU. 



S.N. of ester and 



free acid 3-1 S.N. = 2*9 S.N. = 3'^i 



The eucalyptol was determined by the resorcinol method 

 and although this would seem to indicate the presence o 

 a larger amount of that constituent, yet the result is mon 

 accurate than would be the case if determined by th< 

 phosphoric acid method. 



The Nubeena sample contained less high boiling con 

 stituents than did the Ilobart material, arid consequent 1\ 

 was of less specific gravity. It also contained a littl< 

 more eucalyptol. 



On rectification, nothing distilled below 174 C. (corr. 

 with either sample. The Hobart (16.4.12) oil gave 5^ 

 per cent, distilling between 174-195 C., and 37 pe: 

 cent, between 195-255, mostly between 230-240. Th< 

 Hobart sample (15.5.12) gave 63 per cent, betweei 

 174-195, and 32 per cent, between 195-245. Th< 

 Nubeena sample gave 83 per cent, distilling b?tweei 

 174-195, and 10 per cent, between 195-266. 



These fractions gave the following results: 



Hobart. Hobart. Nubei-na. 



(16.4.12.) (ln.ft.W 0*.4.1-_>. i 



First Fractions 

 Specific gravity 



at 1 5 C '. . 8589 866-2 8605 



Rotation a D . - 86 '8 -733 - 62 '8 



K.'fractive index Atl8=l'4738 At 18= 1 "4729 At20=l'474fr 



Second Fractions 

 Specific gravity 

 at!5C 0-9191 0-9184 08939 



Rotation a,, ... 14-9 - 17'2 -23-9 



Refractive index At 18=l-4833 Atl8=l-4823 At 20= 1-482 



