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Observations on the superior efficacy of the red Peruvian bark, in the cure of agues and other fevers..., 1783

The third edition of William Saunders's text, which was first published in London, included experiments, specific medical use of red Peruvian bark, and case studies of treatments for agues and fevers, and supporting letters from others.

Courtesy National Library of Medicine

Title page of Observations on the superior efficacy of the red Peruvian bark.