PREFATORY ADVERTISEMENT.
T HE feveral fpecies of the genus Cinchona,
from which the Peruvian and other Barks of a
fimilar quality are taken, have been hitherto but
little known to the Botanifts of Europe; and
even the principal fpecies, the Cinchona Officinalis,
fo long eftabliffied in the pra&ice of Phyfic as
one of the happieft of modern difcoveries, was
but obfcurely known till about the year 1738,
when Monf. Condamine elucidated its Hiftory,
a 2 and
