AUSTRALIAN MELALEUCAS AND THEIR ESSENTIAL OILS. 213 



Between 260 and 270° only 8 per cent, came over, bui 

 between 270 — 277° no less than 65 per cent, of the total 

 distilled, 73 per cent, thus forming the third fraction. 

 These fractions gave the following results : — 



Sp. gr. at 15°C. Rotation a n Ref.ind. at 22°C. 

 First fraction (8%) 0*8768 - 14°.5 1*4679 



Second fraction (7%) 0*8784 - 19°.6 1*4720 



Third fraction (73%) 0*9028 + 11°.6 1*4851 



To obtain sufficient of the lower boiling constituents for 

 determination, another 100 cc. were rectified with the above 

 results. The amounts distilling below 260° (30 cc.) were 

 added together, the cineol determined, and the remainder, 

 with the unabsorbed portion, distilled to 177° C. The 

 cineol was removed from this by repeated agitation with 

 50 per cent, resorcinol, the unabsorbed portion washed and 

 dried. On again distilling, about half came over between 

 155-162°, another fair portion between 170-177°. With 

 these the following results were obtained : — 



S P'* r - Rot a Ref - ind - 

 atl5°C. ' D at24°C. 



First portion (155 - 162°) 0*8604 - 10°.6 1*4668 



Second portion (170 - 177°) 0*8534 -20°.l 1*4718 



The nitrosochloride was prepared with the first portion 

 and this when finally purified melted at 103-4°, pinene was 

 thus present. The tetrabromide was formed with the 

 second portion and this when purified from acetic-ether 

 melted at 118 - 119 thus indicating dipentene as well as 

 leevo-limonene. 



There were thus shown to be present in this oil about 5 

 per cent, cineol, about 6 per cent, pinene, and about 4 per 

 cent, limonene, the remainder consisting largely of the 

 aliphatic sesquiterpene alcohol, while the presence of the 

 corresponding sesquiterpene was also indicated. 



