AND THEIR ESSENTIAL OILS. 61 



cellis vix ullis. Calyx turbinatis, operculura 

 hemisphericum v. conicum. 



Fructus turbinatus, margo contracto, con- 

 cavo J" longa, J" lata, valvae prorsus inclusae. 



CHEMISTRY. 



Kssential Oil . The material of this form for distillation 

 was collected at St. Marys in June, 1912. The average 

 yield of oil was 0'657. The crude oil was little coloured, 

 of a terpene odour, and contained much phellandrene, 

 scarcely any pinene, and a very small amount of eucalyp- 

 tol. Eudesmol was detected in it. The oil belongs to 

 the " Peppermint " group, as it contained a small amount 

 of piperitone, and a considerable quantity of high boiling 

 constituents was also present. The yield of oil was small, 

 and for this and other reasons can have little commercial 

 value. The principal constituent in the high boiling frac- 

 tion appeared to be the sesquiterpene. 



The specific gravity of the crude oil at 15 C. = 0'8864 ; 

 rotation a D = -27'6; refractive index at 17 = 1'4872, 

 and was soluble in 5 volumes 80 per cent, alcohol. The 

 saponification number for the esters and free acid was only 



3-0 

 <o 



On rectification, a few drops of acid water, and a little 

 volatile aldehydes of a not unpleasant odour, came over 

 below 173 C. (corr.). Between 172-198 68 per cent, 

 distilled; between 198-265 only 1 c.c. came over; and 

 between 265-282 26 per cent, distilled. These fractions 

 gave the following results: 



Sp. Gr at Ref. Index 



P loo C . Rotation a o ^ 1?0 



First fraction 0-8592 ... 45-1 ... 1-4808 



Second fraction 0-9408 ...Dextro-rotatory... 1-5029 

 (265-282) 8 to 10, hut 



light did not 



pa-s well 



The eucalyptol was determined by the resorcinol method 

 in the portion distilling below 198, and gave a result 

 equal to 7 per cent, of that constituent in the crude oil. 



These results indicate that this form is somewhat closely 

 associated with the Tasmaniaii E. rircjata. The oil from 

 the latter, however, contained more eucalyptol and more 

 eudesmol, while that of K. taeniola had more phellandrene, 

 as indicated by the rotation figures. 



