ESSENTIAL OIL. \ sample of the oil oi this spei forwarded 



ii- for investigation l>\ Mr. C. E. Lane Poole, thi i i oj Fon >ts oi W( ;tem 



Australia. The oil had been di tilled, bj Mi Braddock of that State, who obtained 

 .1 \ ield "i 0'5 per ceni . 



I h«' crude oil was mobile, oi a Lighl amber colour, with a terpene lik< odour, 

 and a secondar} aromatic one. 1< contained a considerable quantity of pinem 

 but phellandrene was absent. Both limonene and terpinene wen present, as 

 was also cineol. 1 1 1 - ester was apparently largelj g< 



rhe crude oil had specific gravit) a1 15 C. 0-8852; rotation a B 31-2 ; 

 ictive index .'1 20 = 1-4719; and was soluble in to volumes 80 per cent, 

 alcohol. The saponification number for the • t< 1 and En 1 acid was 7-5. 



On rectification, 1 per cent, distilled below [60 < . (con Between 



160-172 , 61 per cent, distilled; between 172 193 . 28 per cent, distilled, leaving 

 to per cent, of residue. The fra< tions and residue gave the following results:— 

 Firsl fraction, sp. gr. at 15 C. = 0*8740; rotation a 33-2 : refractive 



index a1 20 = 1-4671. 

 Second .. .. ,, = 0-8837 ; rotation a, 35-0 : refractive 



index a.l 20 = 1-4710. 

 Residue ,. ,, = 0-9521; rotation a, 3-0 : refractive 



index al 20° = 1-4988- 



The lower boiling portion of the first fraction gave a nitrosochloride melting 

 at 104 C, so thai pinene was present in quantii \ . 



The second fraction contained limonene, dipentene, and terpinene. 



The saponification number for the residue was 1 5 - 1 . and in the cold with 

 two hours' contaci i1 was 9-6. The odour of the cold saponified oil was thai oi 

 geraniol, so that the indication is 3-36 per cent, of geranyl-acetate in thai 

 portion. 



The saponification number for the first fraction was 8-i, so thai a low 

 boiling ester, probably butyl-butyrate, was present. 



The cineol was determined by the resorcinol method in the portion dis- 

 tilling below [03°; when calculated for the crude oil, the result was 30 per c< in. 

 As the low boiling esters were also absorbed this is somewhat in excess of the real 

 amount, and phosphoric acid did not indicate more than about [5 per ceni. in the 

 crude oil. 



See also the article in this work, "On the occurrence oi rerpinene in 

 Eucalj pt 11s ( >ils." 



32, Eucalyptus redunca. 



chau., in Lehmann's Plain. Preiss I, 127. 1844.) 

 White Gum. 



Systematic. A shrub or small tre< 1 aching up to [20 feet, F.v.M., 

 var. data, Benth. with a smooth white bark. Normal leaves ovate- 

 lanceolati to lanceolate, som acuminate, averaging about 3 inches long, 



thick, coriaceous, "pen somewhal crenulate; venation moderate^ distind al 

 times, intramarginal vein looped, much removed from the edge, lateral veins 



