1*5 



beyond the usual time. This laevo-rotation is nol due to thi ence oi 



phellandrene, as th o1 occur in am ol the oils "I this group. 



ml oi / ractea is one oi the richesl in cineol, and in the 



particular cases listed above, thai constituenl was alwaj's in tin neighbourhood 

 oi 80 per < enl , 



I In- solubility was always high ; onh from 1 • 1 to 1-2 volumes 71 pei 1 ent. 

 alcohol being required to form .1 clear solution 



2 Hi ALYPTUS .ir.s'7'A'.l /./.!, V.I, " First hour oil." 

 NARROW LEAF" OR " B] \< K PEPPERMINT." 

 (A species distilled in New South Wales.) 



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



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



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



ily within the last six or seven years, however, that this mode oi procedure 



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



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



/-.'. A n linlidiit! in this way. The product so separated is known commercially 



as ' First hour oil," and is sold foi pharmaceutical purposes, the portion 



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



in hes ol industry. 



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

 remarkable how closely the results agree; the oil has a pie. is, mi odour, contains 



aboul 70 1 i oi cineol, and will no doubt be in greai demand when n 



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

 oil of E. polybractea. 





