beyond the usual time. This Isevo-rotation is not due to the presence of 

 phellandrene, as that terpene does not occur in any of the oils of this group. 



The oil of E. polybractca is one of the "richest in cineol, and in the 

 particular cases listed above, that constituent was always in the neighbourhood 

 of 80 per cent. 



The solubility was always high ; onlv from i-i to 1-2 volumes 70 per cent, 

 alcohol being required to form a clear solution. 



(2) EUCALYPTUS AUSTRAL1ANA, " First hour oil." 



' NARROW LEAF " OR " BLACK PEPPERMINT." 



(A species distilled in New South Wales.) 



In the first edition of this work (page 170, under E. amygdalina} it was 

 shown, that by fractional separation during the primary distillation, the oil which 

 came over during the first hour contained the greater portion of the cineol. It 

 is only within the last six or seven years, however, that this mode of procedure 

 has been adopted in commercial distillation, but during that time considerable 

 quantities of a high-class water-white cineol oil have been distilled from 

 E. Auttraliana in this way. The product so separated is known commercially 

 as " First hour oil," and is sold for pharmaceutical pu/poses, the portion 

 distilling later, which contains terpineol and geraniol, being employed in other 

 branches of industry. 



Although this " First hour oil " is thus collected empirically, yet it it 

 remarkable how closely the results agree; the oil has a pleasant odour, contains 

 about 70 per cent, of cineol, and will no doubt be in great demand when it 

 becomes better known. Its solubility in alcohol is quite equal to that of the 

 oil of E. polybractea. 



50068 2E 



