8 4 



colour, and had an odour resembling the cineol-pinene oils generally. Pinene 

 was the principal terpene, and phellandrene was absent. The oil contained 

 a fair amount of cineol. The third fraction consisted principally of the 

 sesquiterpene. 



The crude oil had specific gravity at 15 C. = 0-9076 ; rotation a v + 10-25 ', 

 refractive index at 20 = 1-4691, and was soluble in if- volumes 70 per cent, alcohol. 

 The saponification number for the esters and free acid was 4-9. 



On rectification 2 per cent, distilled below 165 C. (corr.). Between 

 165-185, 82 per cent, distilled; between 185-255, 6 per cent, came over, and 

 between 255-270, 5 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp. gr. at 15 C. : 0-9016; rotation a D + 12-24. 



Second ,, ,, ,, = 0-9186; ,, not taken. 



Third ,, ,, = 0-9316; 



The cineol was determined by the phosphoric acid method in the large 

 fraction. The result was 42 per cent, of that constituent, indicating about 

 35 per cent, in the original oil (O.M.). 



Material of this species was obtained from Girilambone, New South 

 Wales, in March, 1900. The oil differed in no respects from that distilled from 

 the Nyngan leaves. The crude oil had specific gravity at 15 C. : 0-9078; 

 rotation a D + 9-71, and was soluble in 2.\ volumes 70 per cent, alcohol. The 

 saponification number for the esters and free acid was 5-4. 



The cineol determined in the crude oil by the phosphoric acid method was 

 35 per cent. (O.M.). 



Material was also obtained from Gunbar, New South Wales, in December, 

 1900. The results from the oil agreed entirely with those of the above 

 samples. 



The mixed oils of the above had been kept in the dark, and in October, 

 1919, the sample was again analysed. The oil had increased in specific gravity, 

 and in cineol also, and that constituent was present at this time in some 

 quantity. The specific gravity at 15 C. == 0-9331 ; rotation a u + 10, and refrac- 

 tive index at 20 = 1-4671. 84 per cent, distilled below 190. This fraction had 

 sp. gr. at 15 C. == 0-9145 ; rotation D + 7-8 ; refractive index at 20 = 1-4613. 



The cineol determined by the resorcinol method in the fraction, and 

 calculated for the crude oil, was 65 per cent. By the rapid phosphoric acid 

 method it was 60 per cent., when calculated for the crude oil. 



38. Eucalyptus lactea. 



(R.T.B., Proc. Linn. Soc., N.S.W., 1900, p. 691, t. XL VI, fig. 5.) 

 A Spotted Gum. 



Systematic. A fair-sized tree, with a dirty, flaky bark, which is occasionally 

 smooth. Abnormal leaves ovate, lanceolate ; normal leaves lanceolate, up to 

 6 inches long, and varying in breadth up to 9 lines, straight or falcate, not shining, 

 of the same shade of green on both sides ; petiole under i inch long ; venation 

 fairly well marked, veins oblique, spreading; the distinct, intramarginal vein 



