AROMADENDRIN “FROM EUCALYPTUS KINOS. 139 
in those solutions. mentioned, the crystals left on evaporation all 
tend to form acicular radiating tufts; this isso when slowly 
crystallized from water, alcohol, dilute acetic acid, ether, and 
acetic ether, and it appears difficult to obtain crystals of fair size 
from any solution. The first crystals obtained from the solution 
in absolute alcohol, although impure, appear to be of larger size 
than by any other method. 
Aromadendrin also gives the following reactions, the cold 
aqueous solution of the substance being taken for the determina- 
tions except as otherwise mentioned. The small amount of the 
substance in solution is not sufficient to redden litmus, although 
a stronger solution in hot water does so readily. With solution 
of acetate of lead a yellow-coloured precipitate is formed; ina 
Stronger solution in hot water a dense precipitate forms of a 
yellow-chrome colour, becoming ochre-yellow on drying. 
With solution of sulphate or acetate of copper a light greenish 
precipitate is formed ; this is much more copious in a strong hot 
solution of the substance. ‘ 
Acetate of zinc or acetate of cobalt, both fail to form a precipi- 
tate, the salts being soluble. 
Gold chloride gives a purple colour, the dilute solution of gold 
being readily reduced. 
Silver nitrate gives no precipitate but is reduced ; this very 
readily takes place in a hot strong solution of the substance, a 
bright silver mirror being formed. 
Ammonio-nitrate of silver is readily reduced. 
Fehling’s solution is also reduced on heating. 
latine gives no precipitate. 
All akaline solutions give a yellow to orange colour, ranging 
from the light yellow given by lime-water, to the orange colour 
given by ammonia. 
Ferric chloride gives a purplish-brown colour in all solutions, 
however dilute, there is not the slightest indication of a green 
colour, and it does not readily form a precipitate. 
