A "chart" in the shape of Minnesota, each element is an abbreviation for some common Minnesota word or phrase. For instance "UD" stands for "Uffda" while "PR" is short for "Purple Rain."
As a college student optometrist Beth Gilthvedt traveled from Brainerd, MN with a number of her college friends in 1978 to witness a solar eclipse in Winnipeg. They spent the night before in sleeping bags in a library.