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The History of Poison Sumac
Zinc oxide and ferric oxide are the two active ingredients. Poison ivy and poison sumac were grown in the English Royal Gardens at Q. The Gardens of the Faculty of Medicine in Paris and also in the Gardens of the Empress Josephine Bonaparte. It never reached super popularity status for reasons you can probably guess, but it did earn a super fan in the late 1700s by the name of Andre de Fresnoi. He was an army physician and a professor of medicine.