The Quinine tree or large shrub has provided medical cures for malaria and fever for 400 years. The ground up bark is the key substance for this and as the additive in tonic water.
Quinine and Quarantine: Missouri Medicine Through the Years by Loren Humphrey paperback from Amazon
Credits IMG_1999.JPG by TEBart CC BY-NC-ND 2.0 Quinine tree by VSmithUK CC BY-NC-SA 2.0
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