-77 



/•'. amygdalina differs from thai oi the New South Wales form in ih.it il contains 

 much less cineol, has .1 very high laevo-rotation, contains much more phellan- 

 drene, and is much less soluble in alcohol. The odour oi the oil 1- also much 

 less aromatic. The terpineol in the oil oi the Australian form 1- n >ible for 



this more pronounced aromatii idoui and greatei solubihty. 



The following tabulated results give the general characters oi the crude 

 oils from three consignments, collected al the several localities, and on the dates 

 given : 



Yield of oil 



Specific gravity at 15° C. 



Rotation a D 



Refractive index a1 20 C 



Solubility in alcohol ... 

 Cineol ... 



. mil r in. .1, numb 1 for 



ster and free acid 



The cineol was determined by the resorcinol method, and although this 

 would seem to indicate the presence of an increased amount of that constituent, 

 vet a phosphoric acid determination in the mixed oils gave a result of 16 per cent, 

 cineol. 



The Nubeena sample contained less high-boiling constituents than did the 

 Hobart material, and consequently had a lower specific gravity. It also contained 

 more cineol. 



On rectification, nothing distilled below 174 C. (corr.) with either sample. 

 The Hobart (16th April, 1920), oil gave 57 per cent, distilling between 174-195° C, 

 and 37 per cent, between 195-255°, mostly between 230-240. The Hobart 

 sample (15th May, 1912) gave 63 per cent, between 1 74-195°, and 32 per cent. 

 between 195-245°. The Nubeena sample gave 83 per cent, distilling between 

 174-195", and 10 per cent, between 195-266°. These fractions gave the following 

 results : — 



The high-boiling portion- oi these oils contained a considerable quantity 

 of piperitone, as is the case with E. dives ; thus the temperature did not rise much 

 al 1 ive 255 <'■ 



