i86 



On rectification, only a small amount came over below 170 C. (corr.). 

 Between 170 183 , 78 per cent, distilled; between 183-250 , ro per cent, came 

 over, and between 250--260 , 3 per cent, distilled. These fractions gave the 

 following results :— 



First fraction, sp. gr. at 15 C. = 0-919; rotation a D + 0-85°. 



Second ,, ,, ,, = 0-938; „ - 11-3°. 



Third ,, ,, ,, = 0-942 ; „ not taken. 



Plate Lll 



EUCALYPTUS OLEOSA. F.V.M. 



"RED'' OR "WATER MALL'iE.' 



The figures for the optical rotations indicate the presence of aromadendral. 

 The high specific gravity of the crude oil is partly due to the comparatively large 

 amount of the sesquiterpene. 



The cineol was determined by the phosphoric acid method in the first fraction j 

 the result was 61 per cent., or about 52 per cent, in the crude oil (O.M.). 



This sample of oil had been stored in the dark, and in September, 1919, 

 was again analysed. 84 per cent, distilled below 190 C. The specific gravity 

 had increased a little, while the left rotation of the original oil had diminished. 

 It was a little richer in cineol and had formed a deposit. The crude oil and the 

 rectified portion gave the following results :— 



Crude oil, sp. gr. at 15° C. = 0-9400; rotation nil; refractive index at 



20 = 1-4690. 

 Rectified portion ,, = 0-9240; rotation a D +1°; refractive index at 



20 = 1-4638. 

 The cineol was determined by the resorcinol method in the rectified portion, 

 and calculated for the crude oil; the result was 71 per cent. By the rapid phos- 

 phoric acid method it was 62 per cent., when calculated for the crude oil. 



