Cinchona for quinine production. While ultimately successful in their primary aim, these expeditions also identified new species of plants and created a new chapter in international relations between the United States and other nations in the Americas. Francesco Torti used the response of fevers to treatment with cinchona as a system of classification of fevers or a means for diagnosis. The use of cinchona in the effective treatment of malaria brought an end to treatment by bloodletting and long-held ideas of humorism from Galen. For his part in obtaining and helping the establishment of cinchona in British India Clements Markham was
Christmas tree production in the United States million Christmas trees valued at approximately $120 million. The majority of Christmas tree production occurs in the Willamette Valley region including Benton, Clackamas, Marion, Polk and Yamhill counties. In 2015, Washington State had approximately 250 Christmas tree farms with a combined 23,000 acres, yielding 2.3 million Christmas trees valued at approximately $35 million. The majority of Christmas tree production occurs in the western and southern portions of the Puget Sound region including Kitsap, Lewis, Mason and Thurston counties. Aside from Pennsylvania, several U.S. states in the Great Lakes region are key Christmas tree producers. The two most important production areas