Tyrian purple 520 nm, which is green). It is believed that the intensity of the purple hue improved rather than faded as the dyed cloth aged. Vitruvius mentions the production of Tyrian purple from shellfish. In his "History of Animals", Aristotle described the shellfish from which Tyrian purple was obtained and the process of extracting the tissue that produced the dye. Pliny the Elder described the production of Tyrian purple in his "Natural History": The most favourable season for taking these [shellfish] is after the rising of the Dog-star, or else before spring; for when they have once discharged their waxy secretion,
Eva Emery Dye by a woman in the discovery of this great section of the country is but the beginning of what is due... Following the ceremony, Dye formally presented the statue to the soon-to-open Lewis and Clark Centennial Exposition, where it was seen by an estimated three million visitors. It currently resides in Portland's Washington Park at . Eva Emery Dye Eva Emery Dye (1855 – February 25, 1947) was an American writer, historian, and prominent member of the Women's Suffrage movement. As the author of several historical novels, fictional yet thoroughly researched, she is credited with "romanticizing the historic West, turning