ESSENTIAL OIL. Leaves and terminal branchlets for distillation w 

 obtained from Rylstone, N S.W., in \m ust, [898. The yield "I oil was 

 cent. The crude oil was ol an amber colour, and had an odour corresponding 

 to that of the phellandrene Eucalyptus < >il>. Phellandrene was presenl in con- 

 siderable quantity, bu1 pinene only in small amount. Cineol was only found in 

 small amount in the firsl fraction. The pepperminl ketone, piperitone, was no1 

 pronounced, bul a constituent having a cinnamon-Uke odour was present in the 

 second fraction. The third fraction consisted largel} oi the sesquiterpene. 

 Crystallised eudesmol was nol detected. 



The crude oil had specific gravitj .it 15 C. = 0-871; rotation -22-7 ; 

 refractive index .it 20 ''I s 13. and was insoluble in to volumes 80 per cent. 



aL ohol. The saponification number for the esters and free a< id was 2-1. 



On rectification, 1 per rent, distilled below 173 C. (corr.). Between 

 17.I i' s .'. • 80 percent, distilled; between 183-245°, n per cent, came over, and 

 between 245 266°, 4 per cent, distilled. These fractions gave the following 

 results : — 



Firsl traction, sp. gr. at 15" C. = 0-863; rotation a B 24-6°. 



Second ,. .. '.. = o-88o ; ,, 197°. 



Third .. .. ,. = 0-931 ; ,, not taken. 



The above sample was stored in the dark, and in November, 1919, was 

 attain analysed. Very little alteration had taken place during the twenty-one 

 years the oil had been kept, although the phellandrene had suffered some loss 

 in rotation. 83 per cent, distilled below igo° C. The crude oil and the rectified 

 portion gave the following results : — ■ 



Crude oil, sp. gr. at 15° C. = 0-8782; rotation a D - - 17-4°; refractive index 



at 20 = 1-4844. 

 Rectified portion „ =0-8644; rotation!/,, -21-5°; refractive index 



at 20 = 1-4801. 

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

 when calculated for the crude oil, the result was 8 per cent. 



169. Eucalyptus Macarthuri. 



ill D. & 111 M.. I'm. I miu S01 „ N.S.W., 1899, p. 448, t. XXXVIII.) 

 Paddy's River Box, Camden Woolly butt. 



Systematic.- A medium-sized tree, with a rough, somewhat ' Box "-like 

 bark. Abnormal leaves linear-lanceolate, slightly cordate, barely stem clasping, 

 . ,],., and opposite, brighl green in colour, of similar tint on both sides. 

 Normal leaves alternate, narrow lanceolate, often filiate, thickish, oi equal 

 colour on both sides; venation not prominent, intramargihal vein at some 

 distance from the edge. Umbels axillary, with short, scarcely flattened peduncles, 



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