32 J. H. MAIDEN AND H. G. SMITH. 
Eupesmin (C,,H,, O;) : 
We give this name* to one of the substances causing the — 
turbidity of solutions of kinos of the turbid group, and proceed to : 
give an account of the method adopted for its isolation, prior to 
dealing with its properties and composition. 
It is not necessary to enumerate the many methods adopted to 
isolate this substance. We will at once proceed to describe what 
we at present helieve to be the best method for its extraction, — 
and by this process it can be easily obtained crystallized, and in 
@ pure state. | 
When the kino is finely powdered and treated with ether ina 
dry state, practically nothing is taken into solution, but if a small 
quantity of water is added to the fine powder and gently heated, 
a thick paste is formed. If on cooling, this paste be transferred 
to a separator, ether added and well agitated, it partially goes 
into solution, the ether presenting a yellow colour. By repeated 
agitation, removal of the ethereal layer, addition of fresh ether, 
and repetition of the process for about two days, the greater portion 
of the substances soluble in ether are removed, no emulsion being 
formed. The ether used in these successive extractions is mixed, 
distilled off at a low temperature, and the residual mass, partly 
resinous looking and partly crystalline, is digested in absolute 
alcohol, (in which it is readily soluble with the aid of heat), trans 
ferred to a beaker and allowed to cool. If only a very small 
quantity of the alcohol has been added, nearly the whole of the — 
“‘Endesmin” will crystallize out; these crystals can be transferred 
to a filter, washed with rather dilute alcohol to remove the 7 
amorphous resinous looking body, and transferred to a porous — 
substance to drain. Recrystallization is all that is now needed — 
to obtain these crystals in a perfectly pure state. The appearance — 
of the body as thus obtained is that of a pure wh 
war 
an aes Sie 
4 i BS = Ss = ei de id RT Ay oe SON ee a EP a Te oe 
Bee Te ema ST Lr FES ae at shat BG RE Rea NS Gy aR YEE Uae cer tC wi Si ae =e 
ite mass with a — 
pied, we accepted the suggestion 4 
of the name Eudesmin, from Eudesmi@, : 
