304 



On rectification only i per cent, of acid water and volatile aldehydes dis- 



'tilled below 174 C. (corr.). Between 174-178, 56 per cent, distilled; between 



178-182, 26 per cent, distilled, and between 182-194, 6 per cent, distilled. The 



temperature then rose to 245, and between 245-255, 8 per cent, distilled. 



These fractions gave the following results : 



First fraction sp. gr. at 15 C. = 0-8508; rotation a D -- 47-2; refractive 



index at 20 = 1-4805. 

 Second ,, ,, = 0-8563; rotation a u - - 440; refractive 



index at 20 = i 4825. 

 Third ,, ,, ,, = 0-8749; rotation a D - 32-9; refractive 



index at 20 = .1-4848. 

 Fourth ,, ,, ., = 0-9034; rotation not taken; refractive 



index at 20 = i 4954 



The nitrosite was prepared with the phellandrene, and it was possible to 

 separate this nto two forms, one melting at 112-113, the other at 105 C. 



In view of the prominence recently acquired by the phellandrene Eucalyptus 

 oils in the separation of metallic sulphides from ores by a flotation process, 

 this species has commercial value as an oil-producing tree. The yield, however, 

 is much lower than with some species E. dives for instance. At the present 

 time, no other species growing in the New England District of New South Wales 

 is known from which a greater yield of a pronounced phellandrene oil can be 

 obtained. 



The results of this investigation were published by us in the Proc. Roy. 

 Soc., N.S.W., Nov., 1911. ^ 



165. Eucalyptus dives. 



(Schauer, in Walp. Rep., ii, 926.) 

 Peppermint or Broad-leaved Peppermint. 



Systematic. A tree often attaining very large dimensions, although it is 

 found in flower and fruit when only a few feet high (Mittagong Ranges, Berrima 

 Coal Mine, Pagan's Creek, Braidwood District), and when its leaves are sessile, 

 cordate. Bark greyish, furrowed, and somewhat similar in appearance to 

 that of the " Messmate " (E. phellandni), but yet of a stringy nature. 

 Abnormal eaves ovate cordate sessile, measuring several inches in length ; 

 venat on marked, intramarginal vein removed from the edge Normal leaves 

 lanceolate, petiolate ; venation well marked on both sides, very oblique, intra- 

 marginal vein removed from the edge. Flowers numerous, up to twenty, on 

 axillary peduncles under i inch long. 

 \ 



Fruit. Varying between pear-shaped and hemi- 

 spherical, shining ; rim thick ; valves not 

 exserted or only slightly so ; 3 lines in 

 diameter. 



These somewhat resemble E. amygdalina and allied 

 species, and the smaller forms of E. vitrea. 



Habitat. Common throughout the whole coastal ranges of New 

 South Wales and Victoria. 



