Ordinary constants for the crude oils employed are given, together with 

 their cineol contents, calculated from the results obtained with the rectified oils. 

 The alcoholic values, determined after acetylation, are calculated for C IO H IS O. 



From the results here appended it is seen that the cineol in the oils of the 

 E. cneori folia and E. Australiana types cannot be satisfactorily determined 

 quantitatively by the resorcinol method, although it might well be employed for 

 the oils of the class to which E. polybractea and E. Smithii belong, and give 

 results comparable with those obtained with phosphoric acid 



EUCALYPTUS POLYBRACTEA. 

 Wyalong, N.S.W. 



By allowing for the absorbable constituents and the free alcohol the 

 cineol was practically the same both by the phosphoric and resorcinol methods. 



EUCALYPTUS SMITHII. 

 Hill Top, N.S.W. 



Rectified portion distilling 

 Crude oil. below 190 C. 



(95 per cent.) 



Specific gravity at 15 C. 



Optical rotation a D 



Refractive index at 20 C. 



Cineol (rapid phosphoric acid method) 



Cineol (resorcinol method) 



Absorption with NaHS0 3 



Saponification number (ij hours hot) ... 

 After acetylation (ij hours hot) 



= 0-9292 



+ 4-0 



= 1-4618 



= 8 1 per cent. 



= 85-5 per cent. 



= 0-9213 

 + 3-7 

 = I-459 8 

 = 85 per cent. 

 = 90 per cent. 

 = 2 per cent . 



= 5'4 



= 11-08 



= 1-58 per cent, free alcohol 



In this case, also, after allowing for the absorbable substances other than 

 cineol, the results were practically the same by both methods. 



