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.
A partial solar eclipse visible over most of North America will cover 44 percent of the Arizona sun for a short period in mid- to late afternoon. The eclipse is scheduled to begin at 2:21 p.m. Arizona time, with the partial eclipse at maximum coverage at 3:37 p.m. The eclipse will be over at 4:45 p.m.