' GREY GUM AND ITS ESSENTIAL OIL. 259 
LIST OF AURORAS 1896-7. 
Lat. | E. Long. 
No. Date. Name of Ship, sy a Notes. 
1 |Auz. 21, 1896) Hawkesbury...| 48 2 | 100 21 | Aurora australis at 
midnight. 
» 22, 5, ns .. | 48 1 | 101 20 Aurora at 4 a.m. 
” 23, ” *3 eae 47 49 106 31 | Aurora midnight 
no other partion: 
lars giv 
2 | Oct. »» |Thermopyle...| 46 44 | 114 6 sas “midnight the 
urora was very 
Vivid 
3 | Jan. 2,1897| Damascus ...| 48 9 | 107 10 gets australis 
isible. 
4 |Mar. 1, ,, | Hawkesbury...) 51 4 | 78 49 | Ditto ditto. 
” y te es ...| 51 84 | 938 53 | Ditto ditto. 
vv ch » wf 51 42-| 95 28 | Ditto ditto 
5 |April20, ,, | Aorangi ...| 47 25 | 96 40 | Special notes in text 
6] » 23, 4, a ..| 45 0 [119-121] Ditto dit 
7 jAug.1, ,, |Damascus ..| 46 0 | 108 40} At 8 eae ‘cloudy, 
Aurora australis 
Ee nee visible. 
On “GREY GUM,” (EUCALYPTUS PUNCTATA, DC.,) 
PARTICULARLY IN REGARD TO 1Ts ESSENTIAL OIL. 
By R. T. Baxer, F.1.s., Assistant Curator, and H. G. Smrru, F.c.s., 
Mineralogist, Technological Museum, Sydney. 
[Read before the Royal Society of N. 8. Wales, September 1, 1897.] 
x 
. I.—Inrropuction: 
Schimmel & Co. in their pamphlet under date April 1896, make 
the following statement ;—‘ No reliable information of any kind 
can be given concerning the botanical origin of the Australian oil | 
which we supply, as it is notorious that the leaves of the different 
Varieties of Eucalyptus are no longer kept separate during the 
distilling process in Australia.” It is the desire to remedy the _ 
state of things implied in the above paragraph, that has actuated 
us in entering upon our Eucalyptus oil research, (the first of which = 
was read before this Society at its July meeting 1897), andasfar = 
