192 H. G. SMITH. , 
is obtainable this may be done. These sugary exudations are so 
soluble in water, that a little rain is sufficient to remove them 
entirely from the trees, so that they can only be obtained in 
quantity after a period of hot, dry, weather. 
2. Tue AstRINGENT ExvuparTION. 
This exudation or kino was found to belong to the “turbid 
group” of Eucalyptus kinos, and the crystallisable substance con- 
tained in it was determined by the method previously adopted for 
the extraction of these new bodies from Eucalyptus kinos.' The 
ethereal solution when distilled as much as possible to dryness, 
did not deposit crystals, and when the residue was dissolved in 
absolute alcohol it was with great difficulty that crystals were 
obtained, the alcoholic solution standing some days before the 
substance crystallised out. But the crystals when obtained were 
large and well developed, being rhombic prisms with basal plane 
terminations. Although the formule given for eudesmin? were 
obtained from microscopic crystals, yet, now that macroscopic 
crystals have been obtained, the only addition is the O P plane to 
those previously given. The faces of the brachypinakoids are but 
slightly developed and are often entirely absent ; minute faces of 
the macrodome are seen on most of the crystals. The prismatic 
angles are almost identically 110° and 70°. The crystals thus 
obtained are from 5-6 mm. in length. The accompanying 
photograph shows them the natural size.* 
The colour reactions, melting point, and other physical charac- 
teristics determine these crystals to be “ eudesmin.” 
Aromadendrin could not be detected in this kinvu, so that now 
we are able to divide the “turbid group” of kinos into three 
sub-groups, based on a chemical classification, viz.:—(a) those that 
contain aromadendrin alone, of which Z. calophylla is a represen- 
ee 
1 Proc. Roy. Soc. N. S. Wales, 1895, p. 32, and Journ. Soc. Chem. Inst- 
November, 1896. 
2 Proc. Roy. Soc. N. 8S. Wales, 1895, p. 33. 
3 I am indebted to Mr. Connelly of the pi io Maton Museum for this 
photograph and also for the previous one of raffinose. 
