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.
Total solar eclipses in the USA. If you miss the total solar eclipse of August 21, 2017 â first such eclipse in contiguous U.S. since 1979 â youâll have to wait until 2024 to see the next one. Eleven images capture various phases of the 2001 total eclipse from start to finish.