Experiments On The Red And Quill Peruvian Bark : Kessinger Publishing : 9781104797539 : 1104797534 : 17 Jul 2009 : Experiments On The Red And Quill Peruvian Bark: With Observations On Its History, Mode Of Operation, And Uses (1785) by Ralph Irving is a book that explores the medicinal properties of two types of Peruvian bark - the red and quill varieties. The book provides a detailed account of the experiments conducted on the bark, as well as observations on its history, mode of operation, and uses.The author begins by discussing the history of the Peruvian bark, tracing its origins back to the Incas who used it to treat fevers and other ailments. He then goes on to describe the various experiments he conducted on the bark, including its effects on animals and humans.Irving also discusses the mode of operation of the Peruvian bark, explaining how it works to reduce fevers and other symptoms. He provides a detailed analysis of the chemical components of the bark and how they interact w