142 H. G. SMITH. 
molecule, or the precipitate contained two atoms of lead in the 
molecule. 
Although somewhat resembling catechin in many respects, such 
as melting point; not precipitating gelatine; reduction of gold 
and silver salts; its apparent action like an acid, although but 
slightly acid to litmus ; its reaction with acetate of lead, &c.; its 
slight solubility in cold water; its crystallizing in needles with 
water ; and a few other reactions ; yet, it differs from catechin in 
its composition ; its reaction with ferric chloride ; its not forming 
pyrocatechin on heating in glycerol from 220° C. to 230° C. for 
half an hour; its different reactions with potash solution and 
sulphuric acid; and its not imparting brown tints to cotton cloth 
when boiled with solutions of sulphate of copper, and potassium 
bichromate, it having very little dyeing properties. 
We must admit the family likeness however, and if we con- 
sider the composition of the members of the catechin group 
and the relations of the catechin tannins, we cannot but recog- 
-nise the probability that eventually some connection will be 
found to exist between Aromadendrin and the tannins, of the 
turbid group of Eucalyptus kinos, 
The reactions of the products obtained by fusing Aromadendrin 
with caustic potash, indicate that both phloroglucol and proto- 
catechuic acid are formed. 
Kinoin from Malabar kino is a body also allied in some respects — 
to catechin, and in some of its reactions to aromadendrin. 
When Aromadendrin has been heated in glycerol, the ether 
removes a yellow resinous looking body which is almost insoluble 
in cold water, but instantly soluble in alcohol, forming a yellow 
solution of great staining power, dying the skin, wool, etc., @ 
bright yellow. This is an alteration product that may be con- 
sidered as kino-yellow, and is worthy of further investigation. 
Kino-yellow is also obtained when Aromadendrin is heated above 
its melting point. 
