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.
Visit us on: August 21, 2017 â Great American Eclipse (Total Solar Eclipse) The total phase of this total solar eclipse will be visible from a narrow path spanning all across the USA from the East Coast to the West Coast (see map below), weather permitting. In the surrounding areas, people will see a partial solar eclipse.