CIN—CIN 
wrought investigations of vegetable chemistry. MM. 
lletier and Caventou obtained the alkali cinchonia, by 
4 operating on the Grey Cinchona, or Loxa, or Crown bark, 
ee (cinchona condaminea.) From the Yellow bark, (cinchona 
= cordifolia, they obtained, dan alkali which resembled the 
het aa ttle sae but still presented such discrepancy i 
of 7, as to the idea of their eto 
d principle t called Quinina, Quinine; and it 
_ since or nat peas, ean article of Materia Medica, 
* and extensively used in practice. 
— next analyzed the Red bark, (cinchona oblongifo- 
Pier So which they obtained Cinchonia in threefold 
greater quantity than the Crown bark had yielded, but 
nearly twice as much Quinine as they had been able to 
extract from the Yellow bark. The Quinine differed from 
the other Quinine only in its greater fusibility, and the 
appearance of its sulphate. 
Ulterior ‘i on ntities, proved that 
the two shales colada siadinatoass in all the three 
barks which had been analyzed as above—the Cinchonine, 
relatively to Quinine, bemg in greater quantity in the 
Grey or Loxa bark, while the Quinine predominates so 
much in the Yellow, that the presence of Cinchonine might 
readily have escaped notice, when small quantities were 
subject to experiment. 
The mode of obtaining Cinchonine was, by boiling the 
bark in alcohol, until it all its bitterness—evaporating 
to dryness, in a water bath—dissol the alcoholic ex- 
