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7. I infused half : an ounce of the pulverized bark in thirty- 
two ounces of very hot water for the space of two hours; I then 
took off the liquor, which was well tinged, and put to the 
remaining powders the same quantity of boiling water for the 
same space of time, shaking it occasionally; and when it 
had settled, I separated the second infusion, which was much 
more slightly tinged than the former. On _ the residue I 
poured sixteen ounces of hot water, and though I shook it 
more frequently than the two preceding infusions, the water 
was not at all coloured. I filtered the three liquors when 
cold, and evaporated them to the consistency of honey, and 
afterwards in the sun under a glass, to a solid consistency. . 
There resulted forty-three grains of pure dry extract, having all 
_the characters of that produced by the sixth operation. The re- 
sidue weighed two drachms and a half, having a slight bit- 
ter taste with very little smell. The original half ounce of 
powders lost sixty-five grains of its weight. 
__ 8. In twelve ounces of pure alcohol I infused for ten days in 
a glass vessel, two ounces of the pulverized bark, and on shak- 
ing it repeatedly a beautiful and rather lively reddish tint 
_ was produced, which after filtration was finely transparent, and 
of a much brighter colour than the tincture of amber. The resi- 
duum was clearer than the Howders before infusion, with a bit- 
ter taste and very little. sme infused this_ residuum in 
an equal quantity of ‘picobol, Sobach, assumed a pretty strong 
tinge; but when poured into water it did not become turbid, or 
manifest the slightest resinous or milky appearance, like that 
of the first infusion, a few drops of which immediately imparted 
this milkiness to an ounce of distilled water; a proof that the 
first alcohol dissolved all the resinous part, and the pecond was 
2U 7 
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