30 



pressure the greater portion came over between 99-100 C. This had specific 

 gravity at 15 C. = 0-940; rotation a v + 21-5; refractive index at 20 = 1-4831, 

 and gave a good yield of phenyl-urethane, melting at in C. 



It is thus evident that the principal alcohol in the oil of this species is 

 dextro-rotatory terpineol, and by inference that of other associated species also. 

 As terpineol has been isolated from the oils of the " Peppermint " group, it is 

 evident that this alcohol as well as geraniol runs through the whole genus. 



The acids in the aqueous portion were determined in the usual way. The 

 result was 86-94 per cent, barium acetate and 13-06 barium butyrate. This again 

 indicates that butyl-butyrate is the lower boiling ester in this oil. 



A sample of the oil of this species was distilled by Mr. Braddock in West 

 Australia, in October, 1918, and forwarded to the Museum by Mr. C. E. Lane 

 Piole, the Conservator of Forests for that State. The oil was a little heavier 

 than the previous sample and had apparently been distilled longer, it also 

 contained a little more cineol, otherwise the general trend of results is similar. 



The crude oil had specific gravity at 15 C. = 0-9083; rotation a D + 

 20-5; refractive index at 20 = 1-4748. 



The saponification number for the esters and free acid was 41 by heating, 

 and 14-7 in the cold with two hours' contact. 



The range of saponification number was n-6 for the first fraction, 27-8 

 for the second fraction, and 100 for the third fraction. 



A portion of the crude oil was acetylated, when the saponification number 

 had risen to 83-8 ; while in the cold with two hours' contact it was 50-0, thus 

 indicating geraniol as the alcohol, particularly as the odour of the separated oil 

 was distinctly that of geraniol. The acids from all the saponifications were 

 separated, purified, and determined in the usual way, the result being 66-8 per 

 cent, barium acetate, and 33-2 per cent, barium butyrate. 



The original determination of the oil of this species was published by us 

 in the Pharmaceutical Journal, September, 1905. Taken as a whole the results 

 agree very well with those now recorded, as is shown by the following : 

 Material sent from Karridale, Western Australia, in January, 1904. The yield 

 of oil was 0-83 per cent. The crude oil was light-lemon yellow in colour, and 

 had a terpene-like odour. The oil consisted largely of dextro-rotatory pinene. 

 Phellandrene was absent and cineol only present in very small amount. The 

 specific gravity at 15 C. 0-9145; rotation a D + 30-1; refractive index at 

 20 = 1-4727, and was soluble in one volume 80 per cent, alcohol. The 

 saponification number for the esters and free acid was 53-2. 



3. Eucalyptus tesselaris. 



(F.v.M., in Jour. Linn. Soc., iii, 88.) 

 Moreton Bay Ash or Carbeen. 



Systematic. A tall tree, with a persistent, tesselated bark on the lower 

 trunk, branches smooth. Leaves thin and narrow, lanceolate, with numerous 

 fine, parallel, not prominent veins, the intramarginal vein close to the edge. Oil 

 glands rare. Peduncles very short, usually several together in lateral clusters 



