REMARKS, i In- shining " Poplai leaved l ■ tham, l; I I , iii, p. _■ i | wi'l 



polyanlhemos (probabl) including also J 1 R.T.B., i l B.), but all 



as »jii' ■ they difiei in the bark, timber, leaves, and chemi i ■••■ [t occu in the 



dry interior of the Continent, whilst the 01 Mueller 



ies in Ins Euealvpt r to show : >ilii v of its 



foliage, which is n<>t illustra luelli i it.), and al o i 



The timber is hard, interlocked, and reddish in colour. 



ESSENTIAL OIL. Leaves and terminal branchlets foi distillation were 

 obtained from Nyhgan, N.S.W.. in November, [899. The yield oi oil was o-66 

 jut cent; The crude oil \v;is yellowish-brown in colour, and had an odour 

 resembling those of the cineol pinene class. Cineol was present in quantity, 

 together with pinene, but phellandrene was absent. Thehighei boiling portion 

 contained the sesquiterpene. The crude oil became turbid on keeping, and 

 eventually deposited a sediment, as do many of the oils belonging to this cla 



The crude oil had specific gravity at 15 C. = 0-9207; rotation a„ + 0-4 ; 

 refractive index at 20 = 1-4652, and" was soluble : n 1! volumes 70 pei cent. 

 alcohol. The saponification number for the esters and free arid was 1-9. 



On rectification, 2 per cent, distilled below 170° C. (corr.). Bi tween 170- 

 183 , 90 per cent, distilled; between 183-255 , only a few drops came over; 

 between 255-265 , 4 per cent, distilled. These fractions gave the following 

 results : — 



First fraction, sp. gr. at 15 C. = 0-9177 ; rotation a B + 5-96°. 

 Second ,, ,, ., = 0-9259; ,. not taken. 



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

 was (12 per cent. (( ).M. | 



The oil of this species is one of the best of the cineol-pinene group, but 

 unfortunately the yield is not large. 



Material from this species was received from Gunbar, N.S.W., in December, 

 1900. With the exception that the yield was rather larger, the oils were practi- 

 cally identical; both were heavy oils, rich in cineol, had slight rotation, showed 

 the presence of pinene and absence of phellandrene. The yield of oil was 

 0-86 per cent. Specific gravity of the crude oil = 0-923; and optical rotation a D 

 + i-2\ The cineol was determined by the phosphoric acid method in the crude 

 oil ; the result was 57 per cent, (O.M.). The crude oil formed a clear solution 

 with i{ volumes 70 per cent, alcohol. 



The above samples were mixed together and stored in the dark, and in 

 August, 1919, the oil was again analysed. The alteration which had taken place 

 in the oil during the nineteen years it had been kept, was in the direction of an 

 increased cineol content; otherwise nol much difference was observed. 86 per 

 cent, distilled below 190 C. The crude oil and the rectified portion gave the 

 following results :— 



Crude oil, sp. gr. at 15 C. = 0-9352; rotation a, + 0-4°; refractive 



index at 20 1*4656. 



Rectified portion ,, „ = 0-92.27; rotation a B + 1-4°: retractive 



index at 20° = I- |.6o2. 

 The cineol was determined by the resorcinol method in the re< tified 

 portion and calculated for the crude oil ; the result was 77 per cenl l'\ the 

 rapid phosphoric acid method it was 70 per cenl when 1 al< ulated for the onj ii 

 oil. Terpineo] was di b 1 ted in the rectified portion 



