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SACCHARINE AND ASTRINGENT EXUDATIONS OF GREY GUM. 177 
On tHE SACCHARINE anp ASTRINGENT EXUDATIONS 
OF THE “GREY GUM” ZUCALYPTUS PUNCTATA, DC., 
AND ON A Propuct ALLIED To AROMADENDRIN. 
By Henry G. Smiru, r.c.s., Technological Museum, Sydney. 
[Read before the Royal Society of N.S. Wales, August 4, 1897. } 
Durine the latter part. of January 1897, I found at Belmore, 
near Sydney, several substances exuding from the bark of trees of 
the Grey Gum, Lucalyptus punctata, DC. The appearance of the 
large white patches of exudation was occasionally so marked that 
the trees looked as if they had been whitewashed. Closer examin- 
ation shewed that a considerable inroad into the bark had been 
made, apparently by the larvee of insects ; from the injuries thus 
caused, a quantity of the several substances about to be described 
was found. The white material was composed of a substance 
Sweetish in taste ; the thicker portions somewhat resembled the 
well known Eucalyptus manna. When exuding it must have 
been liquid as it had run down the tree; in some instances for a 
considerable distance, and from continued coatings good sized 
tears had been formed in places. From the same trees, and at 
the same time, was obtained a more abundant exudation, also 
sweetish, much darker in colour, and which when flowing must 
have been even more liquid than the white substance ; in some 
instances this had run down the trunks of the trees for seven or 
eight feet to the ground, and tears of a considerable thickness 
had accumulated in places. I succeeded in obtaining about six — 
ounces of the more abundant darker material, as free as possible 
from bark and debris, the fine particles of wood and bark with ee 
which the exudation was more or less contaminated, were produced 
by the larva of an insect. v 
Around the small holes from which the white substance was of 
exuding, were seen a great number of large ants ‘ ene geen Je 
L—Aug. 4, 1897, ce 
