'7' 



Forester at Moruya, Mr. CTulee, and his ant, Mr. Harrison, who drove his 



car, it was possible to make extensive observations over a considerable an 

 country, concerning this Eucalypt. Since thai time numerous analyses of the 

 oil have been made for distillers, who have prepared the oil for market, and quite 

 an industry has now been established in the production ol this particulai 

 Eucalyptus oil, and large quantities have ahead}' been sold. 



The determination ol rotations so fai made, have shown the "firsl hour 

 oii " to be usually slightly dextro-rotatory, although ii the distillation be 

 continued longer, the resulting oil may be slightlj laevo-rotatory. Tin- result 

 appears to be due io die presenee of some terpineol. fmprovements in this 

 method of first distillation will result in the production of a pharmaceutical oil 

 from tin- species growing in other localities, and already at Burraga, ir the 

 Bathurst district, it is being so work* d for pharmaceutical oils. An analysis ol the 

 oil from this district is given later. 



In the first edition of tins work, p. 275. we drew attention to some 

 remarkable features shown by the oils id this group, particularly thai of solu- 

 bility in 70 per cent, alcohol, a result which placed the species in the class 

 yielding Eucalyptus oils richest in cineol, thus practically predicting the pre ■ n1 

 results. This high solubility is due to the presence of the alcohols terpineol and 

 geraniol as well as to the cineol. Tha* this is so is shown by the increased 

 saponification numbers of the acetylated higher-boiling fractions, as well as 

 from the result- with the Nerrigundah " second hour oil." 



Yield of Oil. — The yield of oil from the Vourie-Tanto material agrees with 

 that of this species from other localities, and our sample, distilled at the Museum, 

 gave 4-4 per cent, for leave-, with terminal branchlet-, collected in the month of 

 November. The material, which had dried somewhat, was weighed into the 

 si ill and the amount of oil determined. These figures may perhaps be considered 

 as the maximum yield. From a series of results obtained by \n\ E. McGrath, of 

 Yonrie, during the months of June, July, August, September and October, the 

 differences of yield at vaiious times of the year are well illustrated. Mr. 

 McGrath uses a pair of tanks coupled together and worked simultaneously. 

 These are the usual 400-gallon square iron tanks, fitted in the simple manner 

 customary with the majority of Eucalyptus oil distilling plain- in New South 

 Wales, and fired directly. 



Average yield of oil from the two tanks for all distillations. 



The month- of June and July are midwinter in Australia, when the oil is 

 at a minimum. 



The actual weight of green leaves with terminal branchlets packed into 

 tie' tank- was not known, but if tin- be con allied as 800 I 1 ', per tank, which 

 amount would probablj be nearh correct, then lor June an average yield "I _'•.' 

 per cent, was obtained: for July 3 per cut., for August 3-2 per cent., lor Septem- 

 ber 3*4 per cent., and lor part 1 f Octol <i .V.; per cent. 



