;' 1 1 



iri \l YPTUS AUSTRAL1 I V l 



V 1 1 1 in: ih. N S.W. 

 i i Houi Oil Co: ial samp 



Specifii gra\ Lty a1 15 ' C. 

 i >pti< al rotation «„ 

 Refractive index al 20° C. 

 Cineol (rapid phosphoric acid method) 

 < Lnei 'I I resorcinol mel hi id) 

 Absorption with NaHS< I 

 Saponification number (ij hum- hot).. 

 After acetylation (i \ hours hoi i 



oil. 



= On 

 + 2-8° 



I- 1' 



= 72 pei cenl 

 = 8 | 





i- j 



Mil. 



= 3 per cent. 



= 2-97 



= 24-88 



= 6-05 percent, free all ohol. 



The resorcinol method was thus shown not to be suitable for cineol 

 determination in the oil of this species. The alcohols present were largel\ 

 terpineol and geraniol. 



EUCALYPTUS CNEORIFOLIA {a somewhat old sample). 

 Kangaroo [stand, South Australia. 



Specific gravity at 15 C. 

 Optica] rotation a D 

 Refrai tive index at 20 C. 

 1 -I (rapid phosphoric acid method) 

 Cineol (resorcinol method) 

 Absorption with NaHS' > 

 Saponification number (i. 1 , hour- hot) .. 

 After acetylation (1^ hour- hot) 



It is tint- evident that the resorcinol method is neither suitable for the 

 quantitative estimation of cineol in the oil of this species, nor in oils oi this class, 

 and numerous instances of this will he found recorded in this work, under the 

 se\ oral species. 



THE PHOSPHORIC ACID METHOD. 



I In phosphoric acid method lot tin- determination oi cineol in Eucalyptus 

 oils was originally discovered by Mr. L. R. Scammell, oi Adelaide, South 

 Australia, in 1892, and was the outcome of an investigation on various samples 

 of cheap oils then being placed on the market. The process was used by Messrs. 

 Faulding tS: Co. tor the manufacture oi Eucalyptol, 01 cineol, which thej shipped 

 to England. In iNi)| the process was patented 1>\ Mr. Scammell, a- Fauldlng's 



