History of aspirin other studies from the 1960s to the 1980s established aspirin's efficacy as an anti-clotting agent that reduces the risk of clotting diseases. Aspirin sales revived considerably in the last decades of the twentieth century, and remain strong in the twenty-first with widespread use as a preventive treatment for heart attacks and strokes. Medicines derived from willow trees and other salicylate-rich plants have been part of pharmacopoeias at least dating back to ancient Sumer. The Ebers Papyrus, an Egyptian medical text from ca. 1543 BCE, mentions use of willow and myrtle (another salicylate-rich plant) to treat fever and pain. Willow bark
Trysting tree the original tree. A poem, published in 1908, entitled The Trysting Tree, begins: The American 'Trysting Tree' painting by Asher Brown Durand in 1868, was of a courtship spot, "where the Hudson winds to sea". Trysting tree Trysting trees are trees of any species which have, through their individual prominence, appearance, or position, been chosen as traditional or popular meeting places for meetings for specific purposes. Names, dates, and symbols are sometimes found carved on the bark, favouring trees with smoother bark, such as beech, hornbeam and sycamore. Many other forms of landscape features have served as trysting places, such