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 Eclipse in the Park 2017. On Monday, August 21, 2017, a total eclipse of the sun will sweep across the United States from approximately noon until 3:00 PM (Central Time). This is the first total solar eclipse to affect the continental U.S. since 1979, and 20 of Tennessee's state parks fall in the path of totality.. Join us for Total Eclipse in the Park celebrations the weekend prior and stick around for viewing celebrations on August 21.