A substance is anhydrous if it contains no water, for example, salts lacking their water of crystallisation. The way of achieving the anhydrous form differs from one substance to another.
A partial solar eclipse at its peak at 3:37 p.m. in Mesa on Oct. 23, 2014. The eclipse was visible over most of North America and covered 44 percent of the Arizona sun. Michael Chow/The Republic.
Many visitors traveled to the Pacific Northwest to view the eclipse, since it would be the last chance to view a total solar eclipse in the United States for almost four decades. The next over the United States will be the total solar eclipse of August 21, 2017. Although the path of totality passed through Portland, Oregon in early morning, it was not directly observable from the Portland area due to overcast skies. The path of totality passed through Winnipeg, Manitoba in the early afternoon.