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.
On August 21, 2017, the first total solar eclipse since 1991 will be viewable in Jackson Hole, Wyoming. Where will you be on Monday August 21, 2017? I know that may seem like a silly question, but on this date, you could experience one of the most breathtaking sights on earth. On August 21, 2017, the first total solar eclipse since 1991 will be viewable in Jackson Hole, Wyoming.