202 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: — 



>'ubeetia, Tasiiiaji 



Hobarf. . Peninsula. Hobart. 



(16.4.1-2.) (18.4.12.; (15.5.12.) 



Yield of oil 164 per cent. 2*04 per cent. 162 per cent. 



Specific gravity at 



15° C (>-88:3 0-8668 0'8848 



Rotation ajj ... —75 1° —59-1" -67-3" 



Rff. index at 18°. 1 -4790 At 20° = r 4767 At 18°= 1- 4761 



Soluble In 1 vol. 80°/o 7 vols. 70°/^ 1 vol. 80°/^ 



alcohol alcohol alcohol 



Eucalyptol; 12 per cent. 24 per cent. 16 per c^nt. 



S.N. of ester and 



free acid 31 S.N. = 2*9 S.N. = 3i 



The eucalyptol was determined by the resorcinol method,, 

 and although this would seem to indicate the presence of 

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

 accurate than v^'ould be the case if determined by the 

 phosphoric acid method. 



The Nubeena sample contained less high boiling con- 

 stituents than did the tlobart material, and consequently 

 was of less specific gravity. It also contained a little 

 more eucalyptol. 



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

 with either sample. The Hobart (16.4.12) oil gave 57 

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

 cent, between 195-2550, mostly between 230-240O. The 

 Hobart sample (15.5.12) gave 63 per cent, between 

 174-195°, and 32 per cent, between 195-245°. The 

 Nubeena sample gave 83 per cent, distilling between 

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



These fractions gave the following results: — 



Hobart. Hobart. Nubeena. 



(16.4.12.) (15.5.12.) (18.4.12.) 



First Fractions — 

 Sp<'cific gravity 



at 1 5° C '. . • 8589 • 8662 • 8605 



Rotation a^ . —86-8° —73 3° — 62 8° 



Refractive index At 18°==l-4738 At 18°=l-4729 At20°=l-4748 



Second Fractions — 

 Specific gravity 

 atl5°C 0-9191 0-9184 08939 



Rotation a^, ... 149° —172 —23-9° 



Retractive index Atl8°=l-4833 At 18°=1'4823 At 20°= 14821 



