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.
The only total eclipses that have happened in the last 40 years in America were in 1979 (in the NW part of the country only) and 1991 (Hawaii only). Anything else you saw was a partial or an annular eclipse, and those are NOTHING compared to the absolutely amazing spectacle of a total eclipse!!!