26 



yield of oil from the foliage of this species is the same as in the- 

 last case, viz. 8 fluid ounces from 100 Ibs. of freshly gathered 

 leaves. This oil has a pale reddish-yellow color, and a rather 

 mild and agreeable odor, in which respects it resembles the oil 

 from E. obliqua. Its taste likewise is very similar, like it, at- 

 tacking the throat. Its specific gravity is 0.903 : it boils at 

 350, the temperature rising till it reaches 386. In a lamp it 

 burns with a flame rather less luminous than that from American 

 kerosene, the flame is somewhat yellowish. This essential oil in 

 common with those from other species of Eucalypts, is a good 

 solvent for a variety of resinous bodies. 



9. Eucalyptus odorata, Behr one of the so-called Peppermint 

 trees. This species occurs in South Australia, where it forms in 

 open reaches park-like scenery. 



The quantity of oil furnished by the leaves of this species is 

 not large ; two samples were prepared ; the difference in yield 

 was so great, and dissimilarity in other respects such, that it is 

 considered desirable to give a separate description of either, dis- 

 tinguishing them as No. 1 and No. 2. 



In the case of No. 1 the yield was only 0.69 fluid ounces from 

 100 Ibs. of the fresh leaves; while in the case of No. 2 a similar 

 quantity of leaves gave 4.17 fluid ounces. The discrepancy is 

 not easily accounted for, and is possibly due to accidental cir- 

 cumstances. Both samples of oil had a pale, yellowish color, in- 

 clining slightly to green ; they are limpid fluids, diffusing an 

 aromatic smell, in which one resembling that of camphor predo- 

 minates. The taste is similar to that of E. obliqua, but milder. 

 Oil No. 1 had a specific gravity of 0.899 ; its boiling point was 

 335, the temperature subsequently rising to 390 : in a lamp it 

 did not give quite such a brilliant or white flame as that from 

 good kerosene. Oil No. 2 had a specific gravity of 0.922 ; its 

 boiling point was 315, and as evaporation proceeded, the tem- 

 perature rose to 356. In a kerosene lamp it burnt exceedingly 

 well, affording a very brilliant white light. A good solvent for 

 a variety of resinous bodies. 



10. Eucalyptus longifolia, Link the Woolly butt. This 

 Eucalypt is met with in Victoria and New South Wales : is 

 occurs as a tall stately tree. The yield of oil from 100 Ibs. of 

 freshly gathered leaves is 3.40 fluid ounces: tl.e specific gravity 



